d5e33ce06b
33299 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Namhyung Kim
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d5e33ce06b |
perf srcline: Conditionally suppress addr2line warnings
It has symbol_conf.disable_add2line_warn to suppress some warnings. Let's make it consistent with others. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20221215192817.2734573-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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3b27222dd6 |
perf srcline: Skip srcline if .debug_line is missing
The srcline info is from the .debug_line section. No need to setup addr2line subprocess if the section is missing. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20221215192817.2734573-5-namhyung@kernel.org Cc: Peter Zijlstra <peterz@infradead.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: LKML <linux-kernel@vger.kernel.org> Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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06ea72a42d |
perf symbol: Add filename__has_section()
The filename__has_section() is to check if the given section name is in the binary. It'd be used for checking debug info for srcline. Committer notes: Added missing __maybe_unused to the unused filename__has_section() arguments in tools/perf/util/symbol-minimal.c. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20221215192817.2734573-4-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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ea335ef3dd |
perf srcline: Do not return NULL for srcline
The code assumes non-NULL srcline value always, let's return the usual
SRCLINE_UNKNOWN ("??:0") string instead.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221215192817.2734573-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Michael Petlan
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b50d691e50 |
perf test: Fix "all PMU test" to skip parametrized events
Parametrized events are not only a powerpc domain. They occur on other
platforms too (e.g. aarch64). They should be ignored in this testcase,
since proper setup of the parameters is out of scope of this script.
Let's not filter them out by PMU name, but rather based on the fact that
they expect a parameter.
Fixes:
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Changbin Du
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0c0a0db87e |
perf tools: Add .DELETE_ON_ERROR special Makefile target to clean up partially updated files on error.
As kbuild, this adds .DELETE_ON_ERROR special target to clean up partially updated files on error. A known issue is the empty vmlinux.h generted by bpftool if it failed to dump btf info. Reviewed-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Changbin Du <changbin.du@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20221217225151.90387-1-changbin.du@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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cb459c89b7 |
perf test: Update 'perf lock contention' test
Add more tests for the new filters. $ sudo perf test contention -v 87: kernel lock contention analysis test : --- start --- test child forked, pid 412379 Testing perf lock record and perf lock contention Testing perf lock contention --use-bpf Testing perf lock record and perf lock contention at the same time Testing perf lock contention --threads Testing perf lock contention --lock-addr Testing perf lock contention --type-filter Testing perf lock contention --lock-filter test child finished with 0 ---- end ---- kernel lock contention analysis test: Ok Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Blake Jones <blakejones@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221219201732.460111-7-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Namhyung Kim
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5e3febe7b7 |
perf lock contention: Support lock addr/name filtering for BPF
Likewise, add addr_filter BPF hash map and check it with the lock
address.
$ sudo ./perf lock con -ab -L tasklist_lock -- ./perf bench sched messaging
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 10 groups == 400 processes run
Total time: 0.169 [sec]
contended total wait max wait avg wait type caller
18 174.09 us 25.31 us 9.67 us rwlock:W do_exit+0x36d
5 32.34 us 10.87 us 6.47 us rwlock:R do_wait+0x8b
4 15.41 us 4.73 us 3.85 us rwlock:W release_task+0x6e
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Blake Jones <blakejones@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221219201732.460111-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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511e19b9e2 |
perf lock contention: Add -L/--lock-filter option
The -L/--lock-filter option is to filter only given locks. The locks
can be specified by address or name (if exists).
$ sudo ./perf lock record -a sleep 1
$ sudo ./perf lock con -l
contended total wait max wait avg wait address symbol
57 1.11 ms 42.83 us 19.54 us ffff9f4140059000
15 280.88 us 23.51 us 18.73 us ffffffff9d007a40 jiffies_lock
1 20.49 us 20.49 us 20.49 us ffffffff9d0d50c0 rcu_state
1 9.02 us 9.02 us 9.02 us ffff9f41759e9ba0
$ sudo ./perf lock con -L jiffies_lock,rcu_state
contended total wait max wait avg wait type caller
15 280.88 us 23.51 us 18.73 us spinlock tick_sched_do_timer+0x93
1 20.49 us 20.49 us 20.49 us spinlock __softirqentry_text_start+0xeb
$ sudo ./perf lock con -L ffff9f4140059000
contended total wait max wait avg wait type caller
38 779.40 us 42.83 us 20.51 us spinlock worker_thread+0x50
11 216.30 us 39.87 us 19.66 us spinlock queue_work_on+0x39
8 118.13 us 20.51 us 14.77 us spinlock kthread+0xe5
Committer testing:
# uname -a
Linux quaco 6.0.12-200.fc36.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Dec 8 17:15:53 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
# perf lock record
^C[ perf record: Woken up 1 times to write data ]
# perf lock con -L jiffies_lock,rcu_state
contended total wait max wait avg wait type caller
# perf lock con
contended total wait max wait avg wait type caller
1 9.06 us 9.06 us 9.06 us spinlock call_timer_fn+0x24
# perf lock con -L call
ignore unknown symbol: call
contended total wait max wait avg wait type caller
1 9.06 us 9.06 us 9.06 us spinlock call_timer_fn+0x24
#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Blake Jones <blakejones@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221219201732.460111-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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529772c4df |
perf lock contention: Support lock type filtering for BPF
Likewise, add type_filter BPF hash map and check it when user gave a
lock type filter.
$ sudo ./perf lock con -ab -Y rwlock -- ./perf bench sched messaging
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 10 groups == 400 processes run
Total time: 0.203 [sec]
contended total wait max wait avg wait type caller
15 156.19 us 19.45 us 10.41 us rwlock:W do_exit+0x36d
1 11.12 us 11.12 us 11.12 us rwlock:R do_wait+0x8b
1 5.09 us 5.09 us 5.09 us rwlock:W release_task+0x6e
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Blake Jones <blakejones@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221219201732.460111-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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b4a7eff93c |
perf lock contention: Add -Y/--type-filter option
The -Y/--type-filter option is to filter the result for specific lock
types only. It can accept comma-separated values. Note that it would
accept type names like one in the output. spinlock, mutex, rwsem:R and
so on.
For RW-variant lock types, it converts the name to the both variants.
In other words, "rwsem" is same as "rwsem:R,rwsem:W". Also note that
"mutex" has two different encoding - one for sleeping wait, another for
optimistic spinning. Add "mutex-spin" entry for the lock_type_table so
that we can add it for "mutex" under the table.
$ sudo ./perf lock record -a -- ./perf bench sched messaging
$ sudo ./perf lock con -E 5 -Y spinlock
contended total wait max wait avg wait type caller
802 1.26 ms 11.73 us 1.58 us spinlock __wake_up_common_lock+0x62
13 787.16 us 105.44 us 60.55 us spinlock remove_wait_queue+0x14
12 612.96 us 78.70 us 51.08 us spinlock prepare_to_wait+0x27
114 340.68 us 12.61 us 2.99 us spinlock try_to_wake_up+0x1f5
83 226.38 us 9.15 us 2.73 us spinlock folio_lruvec_lock_irqsave+0x5e
Committer notes:
Make get_type_flag() return UINT_MAX for error instad of -1UL, as that
function returns 'unsigned int' and we store the value on a 'unsigned
int' 'flags' variable which makes clang unhappy:
35 98.23 fedora:37 : FAIL clang version 15.0.6 (Fedora 15.0.6-1.fc37)
builtin-lock.c:2012:14: error: result of comparison of constant 18446744073709551615 with expression of type 'unsigned int' is always true [-Werror,-Wtautological-constant-out-of-range-compare]
if (flags != -1UL) {
~~~~~ ^ ~~~~
builtin-lock.c:2021:14: error: result of comparison of constant 18446744073709551615 with expression of type 'unsigned int' is always true [-Werror,-Wtautological-constant-out-of-range-compare]
if (flags != -1UL) {
~~~~~ ^ ~~~~
builtin-lock.c:2037:14: error: result of comparison of constant 18446744073709551615 with expression of type 'unsigned int' is always true [-Werror,-Wtautological-constant-out-of-range-compare]
if (flags != -1UL) {
~~~~~ ^ ~~~~
3 errors generated.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Blake Jones <blakejones@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221219201732.460111-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Namhyung Kim
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59119c09ae |
perf lock contention: Factor out lock_type_table
Move it out of get_type_str() so that we can reuse the table for others later. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Blake Jones <blakejones@google.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221219201732.460111-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Yang Jihong
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8b269b7555 |
perf probe: Check -v and -q options in the right place
Check the -q and -v options first to return earlier on error.
Before:
# perf probe -q -v test
probe-definition(0): test
symbol:test file:(null) line:0 offset:0 return:0 lazy:(null)
0 arguments
Error: -v and -q are exclusive.
After:
# perf probe -q -v test
Error: -v and -q are exclusive.
Fixes:
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Yang Jihong
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7c0a6144f9 |
perf tools: Fix usage of the verbose variable
The data type of the verbose variable is integer and can be negative, replace improperly used cases in a unified manner: 1. if (verbose) => if (verbose > 0) 2. if (!verbose) => if (verbose <= 0) 3. if (XX && verbose) => if (XX && verbose > 0) 4. if (XX && !verbose) => if (XX && verbose <= 0) Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Yang Jihong <yangjihong1@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Carsten Haitzler <carsten.haitzler@arm.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <martin.lau@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Link: https://lore.kernel.org/r/20221220035702.188413-3-yangjihong1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Yang Jihong
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188ac720d3 |
perf debug: Set debug_peo_args and redirect_to_stderr variable to correct values in perf_quiet_option()
When perf uses quiet mode, perf_quiet_option() sets the 'debug_peo_args'
variable to -1, and display_attr() incorrectly determines the value of
'debug_peo_args'. As a result, unexpected information is displayed.
Before:
# perf record --quiet -- ls > /dev/null
------------------------------------------------------------
perf_event_attr:
size 128
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|PERIOD
read_format ID|LOST
disabled 1
inherit 1
mmap 1
comm 1
freq 1
enable_on_exec 1
task 1
precise_ip 3
sample_id_all 1
exclude_guest 1
mmap2 1
comm_exec 1
ksymbol 1
bpf_event 1
------------------------------------------------------------
...
After:
# perf record --quiet -- ls > /dev/null
#
redirect_to_stderr is a similar problem.
Fixes:
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Arnaldo Carvalho de Melo
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b235e5b51f |
tools headers UAPI: Sync linux/kvm.h with the kernel sources
To pick the changes in:
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Arnaldo Carvalho de Melo
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6d5edd15c9 |
tools headers UAPI: Sync powerpc syscall table with the kernel sources
To pick the changes in these csets:
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Arnaldo Carvalho de Melo
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a66558dcb1 |
tools arch x86: Sync the msr-index.h copy with the kernel sources
To pick up the changes in: |
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Arnaldo Carvalho de Melo
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eeac18e2bf |
tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
To pick up the changes in: |
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Arnaldo Carvalho de Melo
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43a3ce77ae |
tools headers UAPI: Sync linux/fscrypt.h with the kernel sources
To pick the changes from: |
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Arnaldo Carvalho de Melo
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51c4f2bf53 |
tools headers cpufeatures: Sync with the kernel sources
To pick the changes from: |
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Arnaldo Carvalho de Melo
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0bc1d0e2c1 |
tools headers disabled-cpufeatures: Sync with the kernel sources
To pick the changes from:
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Arnaldo Carvalho de Melo
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30d647f5ba |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Arnaldo Carvalho de Melo
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66dfc517e8 |
perf python: Don't stop building if python setuptools isn't installed
The python3-setuptools package is needed to build the python binding, so
that one can use things like:
# ~acme/git/perf/tools/perf/python/twatch.py
cpu: 6, pid: 4573, tid: 2184618 { type: exit, pid: 4573, ppid: 4172, tid: 2184618, ptid: 4172, time: 12563190090107}
cpu: 24, pid: 4573, tid: 4573 { type: fork, pid: 4573, ppid: 4573, tid:
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Linus Torvalds
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5f6e430f93 |
powerpc updates for 6.2
- Add powerpc qspinlock implementation optimised for large system scalability and
paravirt. See the merge message for more details.
- Enable objtool to be built on powerpc to generate mcount locations.
- Use a temporary mm for code patching with the Radix MMU, so the writable mapping is
restricted to the patching CPU.
- Add an option to build the 64-bit big-endian kernel with the ELFv2 ABI.
- Sanitise user registers on interrupt entry on 64-bit Book3S.
- Many other small features and fixes.
Thanks to: Aboorva Devarajan, Angel Iglesias, Benjamin Gray, Bjorn Helgaas, Bo Liu, Chen
Lifu, Christoph Hellwig, Christophe JAILLET, Christophe Leroy, Christopher M. Riedl, Colin
Ian King, Deming Wang, Disha Goel, Dmitry Torokhov, Finn Thain, Geert Uytterhoeven,
Gustavo A. R. Silva, Haowen Bai, Joel Stanley, Jordan Niethe, Julia Lawall, Kajol Jain,
Laurent Dufour, Li zeming, Miaoqian Lin, Michael Jeanson, Nathan Lynch, Naveen N. Rao,
Nayna Jain, Nicholas Miehlbradt, Nicholas Piggin, Pali Rohár, Randy Dunlap, Rohan McLure,
Russell Currey, Sathvika Vasireddy, Shaomin Deng, Stephen Kitt, Stephen Rothwell, Thomas
Weißschuh, Tiezhu Yang, Uwe Kleine-König, Xie Shaowen, Xiu Jianfeng, XueBing Chen, Yang
Yingliang, Zhang Jiaming, ruanjinjie, Jessica Yu, Wolfram Sang.
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Merge tag 'powerpc-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Add powerpc qspinlock implementation optimised for large system
scalability and paravirt. See the merge message for more details
- Enable objtool to be built on powerpc to generate mcount locations
- Use a temporary mm for code patching with the Radix MMU, so the
writable mapping is restricted to the patching CPU
- Add an option to build the 64-bit big-endian kernel with the ELFv2
ABI
- Sanitise user registers on interrupt entry on 64-bit Book3S
- Many other small features and fixes
Thanks to Aboorva Devarajan, Angel Iglesias, Benjamin Gray, Bjorn
Helgaas, Bo Liu, Chen Lifu, Christoph Hellwig, Christophe JAILLET,
Christophe Leroy, Christopher M. Riedl, Colin Ian King, Deming Wang,
Disha Goel, Dmitry Torokhov, Finn Thain, Geert Uytterhoeven, Gustavo A.
R. Silva, Haowen Bai, Joel Stanley, Jordan Niethe, Julia Lawall, Kajol
Jain, Laurent Dufour, Li zeming, Miaoqian Lin, Michael Jeanson, Nathan
Lynch, Naveen N. Rao, Nayna Jain, Nicholas Miehlbradt, Nicholas Piggin,
Pali Rohár, Randy Dunlap, Rohan McLure, Russell Currey, Sathvika
Vasireddy, Shaomin Deng, Stephen Kitt, Stephen Rothwell, Thomas
Weißschuh, Tiezhu Yang, Uwe Kleine-König, Xie Shaowen, Xiu Jianfeng,
XueBing Chen, Yang Yingliang, Zhang Jiaming, ruanjinjie, Jessica Yu,
and Wolfram Sang.
* tag 'powerpc-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (181 commits)
powerpc/code-patching: Fix oops with DEBUG_VM enabled
powerpc/qspinlock: Fix 32-bit build
powerpc/prom: Fix 32-bit build
powerpc/rtas: mandate RTAS syscall filtering
powerpc/rtas: define pr_fmt and convert printk call sites
powerpc/rtas: clean up includes
powerpc/rtas: clean up rtas_error_log_max initialization
powerpc/pseries/eeh: use correct API for error log size
powerpc/rtas: avoid scheduling in rtas_os_term()
powerpc/rtas: avoid device tree lookups in rtas_os_term()
powerpc/rtasd: use correct OF API for event scan rate
powerpc/rtas: document rtas_call()
powerpc/pseries: unregister VPA when hot unplugging a CPU
powerpc/pseries: reset the RCU watchdogs after a LPM
powerpc: Take in account addition CPU node when building kexec FDT
powerpc: export the CPU node count
powerpc/cpuidle: Set CPUIDLE_FLAG_POLLING for snooze state
powerpc/dts/fsl: Fix pca954x i2c-mux node names
cxl: Remove unnecessary cxl_pci_window_alignment()
selftests/powerpc: Fix resource leaks
...
|
||
|
Linus Torvalds
|
1ea9d333ba |
- A few late-breaking minor fixups
- Two minor feature patches which were awkwardly dependent on mm-nonmm. I need to set up a new branch to handle such things. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCY56V1wAKCRDdBJ7gKXxA juVQAP9pr5XBx880RJEil6skMCxYJmae8LvYShhvxJi9keot7QEA3wZRlGcllw/3 fiHcsaBlXqtXBWUbtnMezcdP6gb3TQo= =8T1p -----END PGP SIGNATURE----- Merge tag 'mm-stable-2022-12-17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull more mm updates from Andrew Morton: - A few late-breaking minor fixups - Two minor feature patches which were awkwardly dependent on mm-nonmm. I need to set up a new branch to handle such things. * tag 'mm-stable-2022-12-17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: MAINTAINERS: zram: zsmalloc: Add an additional co-maintainer mm/kmemleak: use %pK to display kernel pointers in backtrace mm: use stack_depot for recording kmemleak's backtrace maple_tree: update copyright dates for test code maple_tree: fix mas_find_rev() comment mm/gup_test: free memory allocated via kvcalloc() using kvfree() |
||
|
Linus Torvalds
|
aa4800e31c |
perf tools changes for v6.2: 1st batch
Libraries:
- Drop the old copy of libtraceevent in tools/lib/traceevent/ now that all major distros
ship it from its external repository.
This is now just another feature detection, emitting a warning when the
libtraceevent-dev[el] package isn't installed, disabling the build of perf features
and tools that strictly require parsing things from tracefs while keeping
the core functionality present and working with a subset of the events, the
most used ones like CPU cycles, hardware cache and also vendor events, etc.
This was tested with lots of containers for Fedora, Debian, OpenSUSE, Alpine Linux,
Ubuntu, with cross builds, etc.
Build:
- Update to C standard to gnu11, like was done for the kernel.
- Install the tools/lib/ libraries locally instead of having headers searched
directly from the source code directories, to help the cases where we can
build either from in-kernel source libraries or from the same library shipped
as a distro package, as is the case with libbpf and was the case with
libtraceevent.
perf stat:
- Do not delay the workload with --delay, the delay is just for starting to count
the events, to skip noise at workload startup.
- When we have events for each cgroup, the metric should be printed for each
cgroup separately.
$ perf stat -a --for-each-cgroup system.slice,user.slice --metric-only sleep 1
Performance counter stats for 'system wide':
GHz insn per cycle branch-misses of all branches
system.slice 3.792 0.61 3.24%
user.slice 3.661 2.32 0.37%
- Fix printing field separator in CSV metrics output.
- Fix --metric-only --json output.
- Fix summary output in CSV with --metric-only.
- Update event group check for support of uncore event.
perf test:
- Stop requiring a C toolchain in shell tests, instead add a workload option that has
all the previously C snippets built as part of 'perf test -w' that then get used in
the 'perf test' shell scripts.
- Add event group test for events in multiple PMUs
- The "kernel lock contention analysis" test should not print warnings in quiet mode.
- Add attr tests for ARM64's new VG register.
- Fix record test on KVM guests, as using precise flag with the
br_inst_retired.near_call event causes the test fail on KVM guests, even when
the guests have PMU forwarding enabled and the event itself is supported, so just
remove the precise flag from the event.
- Add mechanism for skipping attr tests on specific kernel versions where it is known that
these checks will fail.
- Skip watchpoint tests if no watchpoints available.
- Add more Intel PT 'perf test' entries: hybrid CPUs, split the packet decoder
into a suite of subtests.
perf script:
- Introduce task analyzer python script, where one first records some events:
Recording can be done in two ways:
$ perf script record tasks-analyzer -- sleep 10
$ perf record -e sched:sched_switch -a -- sleep 10
The script can parse any perf.data files, as long as it has sched:sched_switch events,
other events will be ignored.
The most simple report use case is to just call the script without arguments.
Runtime is the time the task was running on the CPU, Time Out-In is the time
between the process being scheduled *out* and scheduled back *in*. So the last
time span between two executions:
$ perf script report tasks-analyzer
Switched-In Switched-Out CPU PID TID Comm Runtime Time Out-In
15576.658891407 15576.659156086 4 2412 2428 gdbus 265 1949
15576.659111320 15576.659455410 0 2412 2412 gnome-shell 344 2267
15576.659491326 15576.659506173 2 74 74 kworker/2:1 15 13145
15576.659506173 15576.659825748 2 2858 2858 gnome-terminal- 320 63263
15576.659871270 15576.659902872 6 20932 20932 kworker/u16:0 32 2314582
15576.659909951 15576.659945501 3 27264 27264 sh 36 -1
15576.659853285 15576.659971052 7 27265 27265 perf 118 5050741
[...]
perf lock:
- Allow concurrent record and report to support live monitoring of kernel lock
contention without BPF:
# perf lock record -a -o- sleep 1 | perf lock contention -i-
contended total wait max wait avg wait type caller
2 10.27 us 6.17 us 5.13 us spinlock load_balance+0xc03
1 5.29 us 5.29 us 5.29 us rwlock:W ep_scan_ready_list+0x54
1 4.12 us 4.12 us 4.12 us spinlock smpboot_thread_fn+0x116
1 3.28 us 3.28 us 3.28 us mutex pipe_read+0x50
- Implement -t/--threads option when using BPF:
$ sudo ./perf lock contention -abt -E 5 sleep 1
contended total wait max wait avg wait pid comm
1 740.66 ms 740.66 ms 740.66 ms 1950 nv_queue
3 305.50 ms 298.19 ms 101.83 ms 1884 nvidia-modeset/
1 25.14 us 25.14 us 25.14 us 2725038 EventManager_De
12 23.09 us 9.30 us 1.92 us 0 swapper
1 20.18 us 20.18 us 20.18 us 2725033 EventManager_De
- Add -l/--lock-addr to aggregate per-lock-instance contention:
$ sudo ./perf lock contention -abl sleep 1
contended total wait max wait avg wait address symbol
1 36.28 us 36.28 us 36.28 us ffff92615d6448b8
9 10.91 us 1.84 us 1.21 us ffffffffbaed50c0 rcu_state
1 10.49 us 10.49 us 10.49 us ffff9262ac4f0c80
8 4.68 us 1.67 us 585 ns ffffffffbae07a40 jiffies_lock
3 3.03 us 1.45 us 1.01 us ffff9262277861e0
1 924 ns 924 ns 924 ns ffff926095ba9d20
1 436 ns 436 ns 436 ns ffff9260bfda4f60
perf record:
- Add remaining branch filters: "no_cycles", "no_flags" & "hw_index", to be
used with hardware such as Intel's LBR that allows things like stitching
stacks of two samples to overcome the limits of the number of LBR registers.
Symbol resolution:
- Handle .debug files created with 'objcopy --only-keep-debug', where program
headers are zeroed and thus can't be used for adjustments, use the info in
the runtime_ss (runtime ELF) instead.
perf trace:
- Add BPF based augmenter for the 'perf_event_open's 'struct perf_event_attr' argument.
- Add BPF based augmenter for the 'clock_gettime's 'struct timespec' argument.
- In both cases the syscall tracepoint has just the pointer value, we
need to hook a BPF program to collect the pointer contents, and then,
in userspace, pretty print it in 'perf trace'.
perf list:
- Introduce JSON output of events.
- Streamline how the expression specifying what events should be shown is handled,
fixing several corner cases, such as the metric filter that is specified as a glob
but was using strstr().
perf probe:
- Fix to avoid crashing if DW_AT_decl_file is NULL, coping with clang generating
DWARF5 like that.
- Use dwarf_attr_integrate() as generic DWARF attr accessor as it supersedes dwarf_attr(),
supporting abstact origin DIEs.
perf inject:
- Set PERF_RECORD_MISC_BUILD_ID_SIZE in the PERF_RECORD_HEADER_BUILD_ID so that
perf.data readers can get the real build-id size and avoid trailing zeros.
perf data:
- Add tracepoint fields when converting a perf.data file to JSON.
arm64:
- Fix mksyscalltbl, don't lose syscalls due to sort -nu.
- Add Arm Neoverse V2 PMU events.
riscv:
- Add riscv sbi firmware std event files.
- Add Sifive U74 vendor events (JSON) file.
- Add some more events and metrics for Alderlake/Alderlake-N.
Documentation:
- Add data documentation for the PMU structs in the C source code.
Miscellaneous:
- Periodic sanitization of headers, adding missing includes, removing needless ones,
creating new ones, etc.
- Use sig_atomic_t for signal handlers to avoid undefined behaviour in all perf
tools.
- Fixes for libbpf 1.0+ compatibility (maps, etc) on 'perf trace' BPF examples.
- Remove some old perf bpf examples, leave the best ones that demonstrate how
to associate BPF functions to points in the kernel.
- Make quiet mode consistent between tools.
- Use dedicated non-atomic clear/set bit helpers.
- Use "grep -E" instead of "egrep" as recommended by warning emitted by GNU
grep since at least version 3.8.
- Complete list of supported subcommands in the 'perf daemon' help message.
- Update John Garry's email address for arm64 perf tooling on the MAINTAINERS file,
he moved from Huawei to Oracle.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-for-v6.2-1-2022-12-16' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools updates from Arnaldo Carvalho de Melo:
"Libraries:
- Drop the old copy of libtraceevent in tools/lib/traceevent/ now
that all major distros ship it from its external repository.
This is now just another feature detection, emitting a warning when
the libtraceevent-dev[el] package isn't installed, disabling the
build of perf features and tools that strictly require parsing
things from tracefs while keeping the core functionality present
and working with a subset of the events, the most used ones like
CPU cycles, hardware cache and also vendor events, etc.
This was tested with lots of containers for Fedora, Debian,
OpenSUSE, Alpine Linux, Ubuntu, with cross builds, etc.
Build:
- Update to C standard to gnu11, like was done for the kernel.
- Install the tools/lib/ libraries locally instead of having headers
searched directly from the source code directories, to help the
cases where we can build either from in-kernel source libraries or
from the same library shipped as a distro package, as is the case
with libbpf and was the case with libtraceevent.
perf stat:
- Do not delay the workload with --delay, the delay is just for
starting to count the events, to skip noise at workload startup.
- When we have events for each cgroup, the metric should be printed
for each cgroup separately.
$ perf stat -a --for-each-cgroup system.slice,user.slice --metric-only sleep 1
Performance counter stats for 'system wide':
GHz insn per cycle branch-misses of all branches
system.slice 3.792 0.61 3.24%
user.slice 3.661 2.32 0.37%
- Fix printing field separator in CSV metrics output.
- Fix --metric-only --json output.
- Fix summary output in CSV with --metric-only.
- Update event group check for support of uncore event.
perf test:
- Stop requiring a C toolchain in shell tests, instead add a workload
option that has all the previously C snippets built as part of
'perf test -w' that then get used in the 'perf test' shell scripts.
- Add event group test for events in multiple PMUs
- The "kernel lock contention analysis" test should not print
warnings in quiet mode.
- Add attr tests for ARM64's new VG register.
- Fix record test on KVM guests, as using precise flag with the
br_inst_retired.near_call event causes the test fail on KVM guests,
even when the guests have PMU forwarding enabled and the event
itself is supported, so just remove the precise flag from the
event.
- Add mechanism for skipping attr tests on specific kernel versions
where it is known that these checks will fail.
- Skip watchpoint tests if no watchpoints available.
- Add more Intel PT 'perf test' entries: hybrid CPUs, split the
packet decoder into a suite of subtests.
perf script:
- Introduce task analyzer python script, where one first records some events:
Recording can be done in two ways:
$ perf script record tasks-analyzer -- sleep 10
$ perf record -e sched:sched_switch -a -- sleep 10
The script can parse any perf.data files, as long as it has
sched:sched_switch events, other events will be ignored.
The most simple report use case is to just call the script without
arguments.
Runtime is the time the task was running on the CPU, Time Out-In is
the time between the process being scheduled *out* and scheduled
back *in*. So the last time span between two executions:
$ perf script report tasks-analyzer
Switched-In Switched-Out CPU PID TID Comm Runtime Time Out-In
15576.658891407 15576.659156086 4 2412 2428 gdbus 265 1949
15576.659111320 15576.659455410 0 2412 2412 gnome-shell 344 2267
15576.659491326 15576.659506173 2 74 74 kworker/2:1 15 13145
15576.659506173 15576.659825748 2 2858 2858 gnome-terminal- 320 63263
15576.659871270 15576.659902872 6 20932 20932 kworker/u16:0 32 2314582
15576.659909951 15576.659945501 3 27264 27264 sh 36 -1
15576.659853285 15576.659971052 7 27265 27265 perf 118 5050741
[...]
perf lock:
- Allow concurrent record and report to support live monitoring of
kernel lock contention without BPF:
# perf lock record -a -o- sleep 1 | perf lock contention -i-
contended total wait max wait avg wait type caller
2 10.27 us 6.17 us 5.13 us spinlock load_balance+0xc03
1 5.29 us 5.29 us 5.29 us rwlock:W ep_scan_ready_list+0x54
1 4.12 us 4.12 us 4.12 us spinlock smpboot_thread_fn+0x116
1 3.28 us 3.28 us 3.28 us mutex pipe_read+0x50
- Implement -t/--threads option when using BPF:
$ sudo ./perf lock contention -abt -E 5 sleep 1
contended total wait max wait avg wait pid comm
1 740.66 ms 740.66 ms 740.66 ms 1950 nv_queue
3 305.50 ms 298.19 ms 101.83 ms 1884 nvidia-modeset/
1 25.14 us 25.14 us 25.14 us 2725038 EventManager_De
12 23.09 us 9.30 us 1.92 us 0 swapper
1 20.18 us 20.18 us 20.18 us 2725033 EventManager_De
- Add -l/--lock-addr to aggregate per-lock-instance contention:
$ sudo ./perf lock contention -abl sleep 1
contended total wait max wait avg wait address symbol
1 36.28 us 36.28 us 36.28 us ffff92615d6448b8
9 10.91 us 1.84 us 1.21 us ffffffffbaed50c0 rcu_state
1 10.49 us 10.49 us 10.49 us ffff9262ac4f0c80
8 4.68 us 1.67 us 585 ns ffffffffbae07a40 jiffies_lock
3 3.03 us 1.45 us 1.01 us ffff9262277861e0
1 924 ns 924 ns 924 ns ffff926095ba9d20
1 436 ns 436 ns 436 ns ffff9260bfda4f60
perf record:
- Add remaining branch filters: "no_cycles", "no_flags" & "hw_index",
to be used with hardware such as Intel's LBR that allows things
like stitching stacks of two samples to overcome the limits of the
number of LBR registers.
Symbol resolution:
- Handle .debug files created with 'objcopy --only-keep-debug', where
program headers are zeroed and thus can't be used for adjustments,
use the info in the runtime_ss (runtime ELF) instead.
perf trace:
- Add BPF based augmenter for the 'perf_event_open's 'struct
perf_event_attr' argument.
- Add BPF based augmenter for the 'clock_gettime's 'struct timespec'
argument.
- In both cases the syscall tracepoint has just the pointer value, we
need to hook a BPF program to collect the pointer contents, and
then, in userspace, pretty print it in 'perf trace'.
perf list:
- Introduce JSON output of events.
- Streamline how the expression specifying what events should be
shown is handled, fixing several corner cases, such as the metric
filter that is specified as a glob but was using strstr().
perf probe:
- Fix to avoid crashing if DW_AT_decl_file is NULL, coping with clang
generating DWARF5 like that.
- Use dwarf_attr_integrate() as generic DWARF attr accessor as it
supersedes dwarf_attr(), supporting abstact origin DIEs.
perf inject:
- Set PERF_RECORD_MISC_BUILD_ID_SIZE in the PERF_RECORD_HEADER_BUILD_ID
so that perf.data readers can get the real build-id size and avoid
trailing zeroes.
perf data:
- Add tracepoint fields when converting a perf.data file to JSON.
arm64:
- Fix mksyscalltbl, don't lose syscalls due to sort -nu.
- Add Arm Neoverse V2 PMU events.
riscv:
- Add riscv sbi firmware std event files.
- Add Sifive U74 vendor events (JSON) file.
- Add some more events and metrics for Alderlake/Alderlake-N.
Documentation:
- Add data documentation for the PMU structs in the C source code.
Miscellaneous:
- Periodic sanitization of headers, adding missing includes, removing
needless ones, creating new ones, etc.
- Use sig_atomic_t for signal handlers to avoid undefined behaviour
in all perf tools.
- Fixes for libbpf 1.0+ compatibility (maps, etc) on 'perf trace' BPF
examples.
- Remove some old perf bpf examples, leave the best ones that
demonstrate how to associate BPF functions to points in the kernel.
- Make quiet mode consistent between tools.
- Use dedicated non-atomic clear/set bit helpers.
- Use "grep -E" instead of "egrep" as recommended by warning emitted
by GNU grep since at least version 3.8.
- Complete list of supported subcommands in the 'perf daemon' help
message.
- Update John Garry's email address for arm64 perf tooling on the
MAINTAINERS file, he moved from Huawei to Oracle"
* tag 'perf-tools-for-v6.2-1-2022-12-16' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (239 commits)
libperf: Fix install_pkgconfig target
perf tools: Use "grep -E" instead of "egrep"
perf stat: Do not delay the workload with --delay
perf evlist: Remove group option.
perf build: Fix python/perf.so library's name
perf test arm64: Add attr tests for new VG register
perf test: Add mechanism for skipping attr tests on kernel versions
perf test: Add mechanism for skipping attr tests on auxiliary vector values
perf test: Add ability to test exit code for attr tests
perf test: add new task-analyzer tests
perf script: task-analyzer add csv support
perf script: Introduce task analyzer python script
perf cs-etm: Print auxtrace info even if OpenCSD isn't linked
perf cs-etm: Cleanup cs_etm__process_auxtrace_info()
perf cs-etm: Tidy up auxtrace info header printing
perf cs-etm: Remove unused stub methods
perf cs-etm: Print unknown header version as an error
perf test: Update perf lock contention test
perf lock contention: Add -l/--lock-addr option
perf lock contention: Implement -t/--threads option for BPF
...
|
||
Alexander Gordeev
|
4ff17c448a |
libperf: Fix install_pkgconfig target
Commit
|
||
|
Arnaldo Carvalho de Melo
|
1a931707ad |
Merge remote-tracking branch 'torvalds/master' into perf/core
To resolve a trivial merge conflict with
|
||
|
Linus Torvalds
|
58bcac11fd |
USB/Thunderbolt driver changes for 6.2-rc1
Here is the large set of USB and Thunderbolt driver changes for 6.2-rc1.
Overall, thanks to the removal of a driver, more lines were removed than
added, a nice change. Highlights include:
- removal of the sisusbvga driver that was not used by anyone anymore
- minor thunderbolt driver changes and tweaks
- chipidea driver updates
- usual set of typec driver features and hardware support added
- musb minor driver fixes
- fotg210 driver fixes, bringing that hardware back from the "dead"
- minor dwc3 driver updates
- addition, and then removal, of a list.h helper function for many USB
and other subsystem drivers, that ended up breaking the build. That
will come back for 6.3-rc1, it missed this merge window.
- usual xhci updates and enhancements
- usb-serial driver updates and support for new devices
- other minor USB driver updates
All of these have been in linux-next for a while with no reported
problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB and Thunderbolt driver updates from Greg KH:
"Here is the large set of USB and Thunderbolt driver changes for
6.2-rc1. Overall, thanks to the removal of a driver, more lines were
removed than added, a nice change. Highlights include:
- removal of the sisusbvga driver that was not used by anyone anymore
- minor thunderbolt driver changes and tweaks
- chipidea driver updates
- usual set of typec driver features and hardware support added
- musb minor driver fixes
- fotg210 driver fixes, bringing that hardware back from the "dead"
- minor dwc3 driver updates
- addition, and then removal, of a list.h helper function for many
USB and other subsystem drivers, that ended up breaking the build.
That will come back for 6.3-rc1, it missed this merge window.
- usual xhci updates and enhancements
- usb-serial driver updates and support for new devices
- other minor USB driver updates
All of these have been in linux-next for a while with no reported
problems"
* tag 'usb-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (153 commits)
usb: gadget: uvc: Rename bmInterfaceFlags -> bmInterlaceFlags
usb: dwc2: power on/off phy for peripheral mode in dual-role mode
usb: dwc2: disable lpm feature on Rockchip SoCs
dt-bindings: usb: mtk-xhci: add support for mt7986
usb: dwc3: core: defer probe on ulpi_read_id timeout
usb: ulpi: defer ulpi_register on ulpi_read_id timeout
usb: misc: onboard_usb_hub: add Genesys Logic GL850G hub support
dt-bindings: usb: Add binding for Genesys Logic GL850G hub controller
dt-bindings: vendor-prefixes: add Genesys Logic
usb: fotg210-udc: fix potential memory leak in fotg210_udc_probe()
usb: typec: tipd: Set mode of operation for USB Type-C connector
usb: gadget: udc: drop obsolete dependencies on COMPILE_TEST
usb: musb: remove extra check in musb_gadget_vbus_draw
usb: gadget: uvc: Prevent buffer overflow in setup handler
usb: dwc3: qcom: Fix memory leak in dwc3_qcom_interconnect_init
usb: typec: wusb3801: fix fwnode refcount leak in wusb3801_probe()
usb: storage: Add check for kcalloc
USB: sisusbvga: use module_usb_driver()
USB: sisusbvga: rename sisusb.c to sisusbvga.c
USB: sisusbvga: remove console support
...
|
||
Liam Howlett
|
9102b78b6f |
maple_tree: update copyright dates for test code
Add the span to the year of the development. Link: https://lkml.kernel.org/r/20221025173709.2718725-1-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
|
Linus Torvalds
|
8fa590bf34 |
ARM64:
* Enable the per-vcpu dirty-ring tracking mechanism, together with an option to keep the good old dirty log around for pages that are dirtied by something other than a vcpu. * Switch to the relaxed parallel fault handling, using RCU to delay page table reclaim and giving better performance under load. * Relax the MTE ABI, allowing a VMM to use the MAP_SHARED mapping option, which multi-process VMMs such as crosvm rely on (see merge commit |
||
|
Linus Torvalds
|
94a855111e |
- Add the call depth tracking mitigation for Retbleed which has
been long in the making. It is a lighterweight software-only fix for Skylake-based cores where enabling IBRS is a big hammer and causes a significant performance impact. What it basically does is, it aligns all kernel functions to 16 bytes boundary and adds a 16-byte padding before the function, objtool collects all functions' locations and when the mitigation gets applied, it patches a call accounting thunk which is used to track the call depth of the stack at any time. When that call depth reaches a magical, microarchitecture-specific value for the Return Stack Buffer, the code stuffs that RSB and avoids its underflow which could otherwise lead to the Intel variant of Retbleed. This software-only solution brings a lot of the lost performance back, as benchmarks suggest: https://lore.kernel.org/all/20220915111039.092790446@infradead.org/ That page above also contains a lot more detailed explanation of the whole mechanism - Implement a new control flow integrity scheme called FineIBT which is based on the software kCFI implementation and uses hardware IBT support where present to annotate and track indirect branches using a hash to validate them - Other misc fixes and cleanups -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmOZp5EACgkQEsHwGGHe VUrZFxAAvi/+8L0IYSK4mKJvixGbTFjxN/Swo2JVOfs34LqGUT6JaBc+VUMwZxdb VMTFIZ3ttkKEodjhxGI7oGev6V8UfhI37SmO2lYKXpQVjXXnMlv/M+Vw3teE38CN gopi+xtGnT1IeWQ3tc/Tv18pleJ0mh5HKWiW+9KoqgXj0wgF9x4eRYDz1TDCDA/A iaBzs56j8m/FSykZHnrWZ/MvjKNPdGlfJASUCPeTM2dcrXQGJ93+X2hJctzDte0y Nuiw6Y0htfFBE7xoJn+sqm5Okr+McoUM18/CCprbgSKYk18iMYm3ZtAi6FUQZS1A ua4wQCf49loGp15PO61AS5d3OBf5D3q/WihQRbCaJvTVgPp9sWYnWwtcVUuhMllh ZQtBU9REcVJ/22bH09Q9CjBW0VpKpXHveqQdqRDViLJ6v/iI6EFGmD24SW/VxyRd 73k9MBGrL/dOf1SbEzdsnvcSB3LGzp0Om8o/KzJWOomrVKjBCJy16bwTEsCZEJmP i406m92GPXeaN1GhTko7vmF0GnkEdJs1GVCZPluCAxxbhHukyxHnrjlQjI4vC80n Ylc0B3Kvitw7LGJsPqu+/jfNHADC/zhx1qz/30wb5cFmFbN1aRdp3pm8JYUkn+l/ zri2Y6+O89gvE/9/xUhMohzHsWUO7xITiBavewKeTP9GSWybWUs= =cRy1 -----END PGP SIGNATURE----- Merge tag 'x86_core_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 core updates from Borislav Petkov: - Add the call depth tracking mitigation for Retbleed which has been long in the making. It is a lighterweight software-only fix for Skylake-based cores where enabling IBRS is a big hammer and causes a significant performance impact. What it basically does is, it aligns all kernel functions to 16 bytes boundary and adds a 16-byte padding before the function, objtool collects all functions' locations and when the mitigation gets applied, it patches a call accounting thunk which is used to track the call depth of the stack at any time. When that call depth reaches a magical, microarchitecture-specific value for the Return Stack Buffer, the code stuffs that RSB and avoids its underflow which could otherwise lead to the Intel variant of Retbleed. This software-only solution brings a lot of the lost performance back, as benchmarks suggest: https://lore.kernel.org/all/20220915111039.092790446@infradead.org/ That page above also contains a lot more detailed explanation of the whole mechanism - Implement a new control flow integrity scheme called FineIBT which is based on the software kCFI implementation and uses hardware IBT support where present to annotate and track indirect branches using a hash to validate them - Other misc fixes and cleanups * tag 'x86_core_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (80 commits) x86/paravirt: Use common macro for creating simple asm paravirt functions x86/paravirt: Remove clobber bitmask from .parainstructions x86/debug: Include percpu.h in debugreg.h to get DECLARE_PER_CPU() et al x86/cpufeatures: Move X86_FEATURE_CALL_DEPTH from bit 18 to bit 19 of word 11, to leave space for WIP X86_FEATURE_SGX_EDECCSSA bit x86/Kconfig: Enable kernel IBT by default x86,pm: Force out-of-line memcpy() objtool: Fix weak hole vs prefix symbol objtool: Optimize elf_dirty_reloc_sym() x86/cfi: Add boot time hash randomization x86/cfi: Boot time selection of CFI scheme x86/ibt: Implement FineIBT objtool: Add --cfi to generate the .cfi_sites section x86: Add prefix symbols for function padding objtool: Add option to generate prefix symbols objtool: Avoid O(bloody terrible) behaviour -- an ode to libelf objtool: Slice up elf_create_section_symbol() kallsyms: Revert "Take callthunks into account" x86: Unconfuse CONFIG_ and X86_FEATURE_ namespaces x86/retpoline: Fix crash printing warning x86/paravirt: Fix a !PARAVIRT build warning ... |
||
|
Linus Torvalds
|
ad76bf1ff1 |
memblock: extend test coverage
* add tests that trigger reallocation of memblock structures from
memblock itself via memblock_double_array()
* add tests for memblock_alloc_exact_nid_raw() that verify that requested
node and memory range constraints are respected.
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Merge tag 'memblock-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock updates from Mike Rapoport:
"Extend test coverage:
- add tests that trigger reallocation of memblock structures from
memblock itself via memblock_double_array()
- add tests for memblock_alloc_exact_nid_raw() that verify that
requested node and memory range constraints are respected"
* tag 'memblock-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
memblock tests: remove completed TODO item
memblock tests: add generic NUMA tests for memblock_alloc_exact_nid_raw
memblock tests: add bottom-up NUMA tests for memblock_alloc_exact_nid_raw
memblock tests: add top-down NUMA tests for memblock_alloc_exact_nid_raw
memblock tests: introduce range tests for memblock_alloc_exact_nid_raw
memblock test: Update TODO list
memblock test: Add test to memblock_reserve() 129th region
memblock test: Add test to memblock_add() 129th region
|
||
Tiezhu Yang
|
818448e9cf |
perf tools: Use "grep -E" instead of "egrep"
The latest version of grep claims the egrep is now obsolete so the build now contains warnings that look like: egrep: warning: egrep is obsolescent; using grep -E fix this up by moving the related file to use "grep -E" instead. sed -i "s/egrep/grep -E/g" `grep egrep -rwl tools/perf` Here are the steps to install the latest grep: wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz tar xf grep-3.8.tar.gz cd grep-3.8 && ./configure && make sudo make install export PATH=/usr/local/bin:$PATH Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Acked-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/1668762999-9297-1-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Namhyung Kim
|
c587e77e10 |
perf stat: Do not delay the workload with --delay
The -D/--delay option is to delay the measure after the program starts.
But the current code goes to sleep before starting the program so the
program is delayed too. This is not the intention, let's fix it.
Before:
$ time sudo ./perf stat -a -e cycles -D 3000 sleep 4
Events disabled
Events enabled
Performance counter stats for 'system wide':
4,326,949,337 cycles
4.007494118 seconds time elapsed
real 0m7.474s
user 0m0.356s
sys 0m0.120s
It ran the workload for 4 seconds and gave the 3 second delay. So it
should skip the first 3 second and measure the last 1 second only. But
as you can see, it delays 3 seconds and ran the workload after that for
4 seconds. So the total time (real) was 7 seconds.
After:
$ time sudo ./perf stat -a -e cycles -D 3000 sleep 4
Events disabled
Events enabled
Performance counter stats for 'system wide':
1,063,551,013 cycles
1.002769510 seconds time elapsed
real 0m4.484s
user 0m0.385s
sys 0m0.086s
The bug was introduced when it changed enablement of system-wide events
with a command line workload. But it should've considered the initial
delay case. The code was reworked since then (in
|
||
Ian Rogers
|
5f8f95673f |
perf evlist: Remove group option.
The group option predates grouping events using curly braces added in
commit
|
||
|
Linus Torvalds
|
08cdc21579 |
iommufd for 6.2
iommufd is the user API to control the IOMMU subsystem as it relates to managing IO page tables that point at user space memory. It takes over from drivers/vfio/vfio_iommu_type1.c (aka the VFIO container) which is the VFIO specific interface for a similar idea. We see a broad need for extended features, some being highly IOMMU device specific: - Binding iommu_domain's to PASID/SSID - Userspace IO page tables, for ARM, x86 and S390 - Kernel bypassed invalidation of user page tables - Re-use of the KVM page table in the IOMMU - Dirty page tracking in the IOMMU - Runtime Increase/Decrease of IOPTE size - PRI support with faults resolved in userspace Many of these HW features exist to support VM use cases - for instance the combination of PASID, PRI and Userspace IO Page Tables allows an implementation of DMA Shared Virtual Addressing (vSVA) within a guest. Dirty tracking enables VM live migration with SRIOV devices and PASID support allow creating "scalable IOV" devices, among other things. As these features are fundamental to a VM platform they need to be uniformly exposed to all the driver families that do DMA into VMs, which is currently VFIO and VDPA. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRRRCHOFoQz/8F5bUaFwuHvBreFYQUCY5ct7wAKCRCFwuHvBreF YZZ5AQDciXfcgXLt0UBEmWupNb0f/asT6tk717pdsKm8kAZMNAEAsIyLiKT5HqGl s7fAu+CQ1pr9+9NKGevD+frw8Solsw4= =jJkd -----END PGP SIGNATURE----- Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd Pull iommufd implementation from Jason Gunthorpe: "iommufd is the user API to control the IOMMU subsystem as it relates to managing IO page tables that point at user space memory. It takes over from drivers/vfio/vfio_iommu_type1.c (aka the VFIO container) which is the VFIO specific interface for a similar idea. We see a broad need for extended features, some being highly IOMMU device specific: - Binding iommu_domain's to PASID/SSID - Userspace IO page tables, for ARM, x86 and S390 - Kernel bypassed invalidation of user page tables - Re-use of the KVM page table in the IOMMU - Dirty page tracking in the IOMMU - Runtime Increase/Decrease of IOPTE size - PRI support with faults resolved in userspace Many of these HW features exist to support VM use cases - for instance the combination of PASID, PRI and Userspace IO Page Tables allows an implementation of DMA Shared Virtual Addressing (vSVA) within a guest. Dirty tracking enables VM live migration with SRIOV devices and PASID support allow creating "scalable IOV" devices, among other things. As these features are fundamental to a VM platform they need to be uniformly exposed to all the driver families that do DMA into VMs, which is currently VFIO and VDPA" For more background, see the extended explanations in Jason's pull request: https://lore.kernel.org/lkml/Y5dzTU8dlmXTbzoJ@nvidia.com/ * tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd: (62 commits) iommufd: Change the order of MSI setup iommufd: Improve a few unclear bits of code iommufd: Fix comment typos vfio: Move vfio group specific code into group.c vfio: Refactor dma APIs for emulated devices vfio: Wrap vfio group module init/clean code into helpers vfio: Refactor vfio_device open and close vfio: Make vfio_device_open() truly device specific vfio: Swap order of vfio_device_container_register() and open_device() vfio: Set device->group in helper function vfio: Create wrappers for group register/unregister vfio: Move the sanity check of the group to vfio_create_group() vfio: Simplify vfio_create_group() iommufd: Allow iommufd to supply /dev/vfio/vfio vfio: Make vfio_container optionally compiled vfio: Move container related MODULE_ALIAS statements into container.c vfio-iommufd: Support iommufd for emulated VFIO devices vfio-iommufd: Support iommufd for physical VFIO devices vfio-iommufd: Allow iommufd to be used in place of a container fd vfio: Use IOMMU_CAP_ENFORCE_CACHE_COHERENCY for vfio_file_enforced_coherent() ... |
||
|
Ian Rogers
|
caec54705a |
perf build: Fix python/perf.so library's name
Since Python 3.3 extensions have a suffix encoding platform and version information. For example, the perf extension was previously perf.so but now maybe perf.cpython-310-x86_64-linux-gnu.so. Compute the extension using Python and then use this in the target name. Doing this avoids the "perf.so" target always being rebuilt. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com> Cc: Eelco Chaudron <echaudro@redhat.com> Cc: German Gomez <german.gomez@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Kim Phillips <kim.phillips@amd.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Riccardo Mancini <rickyman7@gmail.com> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Shaomin Deng <dengshaomin@cdjrlc.com> Cc: Stephane Eranian <eranian@google.com> Cc: Timothy Hayes <timothy.hayes@arm.com> Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221213232651.1269909-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
James Clark
|
9440ebdc33 |
perf test arm64: Add attr tests for new VG register
Ensure that the availability of the VG register behaves as expected depending on the kernel version and SVE support. Signed-off-by: James Clark <james.clark@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221213114739.2312862-5-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
James Clark
|
ee26adf627 |
perf test: Add mechanism for skipping attr tests on kernel versions
The first two version numbers are used since that is where the ABI changes happen, so seems to be the most useful for now. 'Until' is exclusive and 'since' is inclusive so that the same version number can be used to mark a point where the change comes into effect. This allows keeping the tests in a state where new tests will also pass on older kernels if the existence of a new feature isn't explicitly broadcast by the kernel. For example extended user regs are currently discovered by trial and error calls to perf_event_open. Signed-off-by: James Clark <james.clark@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221213114739.2312862-4-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
James Clark
|
c3a8f85351 |
perf test: Add mechanism for skipping attr tests on auxiliary vector values
This can be used to skip tests or provide different test values on different platforms. For example to run a test only where Arm SVE is present add this to the config section: auxv = auxv["AT_HWCAP"] & 0x200000 == 0x200000 The value is a freeform Python expression that is evaled in the context of a map called "auxv" that contains the decoded auxiliary vector. Signed-off-by: James Clark <james.clark@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221213114739.2312862-3-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
James Clark
|
a8f26192ca |
perf test: Add ability to test exit code for attr tests
Currently the return value is used to skip the test, but sometimes it can be useful to test if a certain command should return a certain exit code. Signed-off-by: James Clark <james.clark@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20221213114739.2312862-2-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
Petar Gligoric
|
e8478b84d6 |
perf test: add new task-analyzer tests
Provide task-analyzer test cases for all possible arguments and a subset of possible combinations. 12 Tests in total. test_basic: - cmd:"perf script report task-analyzer" - Fundamental test of script without arguments. - Check for standard output. test_ns_rename: - cmd:"perf script report task-analyzer --ns --rename-comms-by-tids 0:random" - Standard task with timestamps in nanoseconds and comm renamed. - Check for standard output. test_ms_filtertasks_highlight: - cmd:"perf script report task-analyzer --ms --filter-tasks perf --highlight-tasks perf" - Standard task with timestamps in milliseconds, task filtered out and highlighted. - Check for standard output. test_extended_times_timelimit_limittasks: - cmd "perf script report task-analyzer --extended-times --time-limit :99999" - Standard task with additional schedule out/in info and timlimit active at 99999. - Check for extended table output. test_summary: - cmd:"perf script report task-analyzer --summary" - Standard task with additional summary output. - Check for summary print. test_summary_extended: - cmd:"perf script report task-analyzer --summary-extended" - Standard task with summary and additional schedule in/out info. - Chceck for extended table print. test_summaryonly: - cmd:"perf script report task-analyzer --summary-only" - Only summary should be printed. - Check for summary print. test_extended_times_summary_ns: - cmd:"perf script report task-analyzer --extended-times --summary --ns" - Standard task with extended schedule in/out information and summary in ns. - Check for extended table and summary. test_csv: - cmd:"perf script report task-analyzer --csv csv" - Print standard task to csv file in csv format. - Check for csv format. test_csv_extended_times: - cmd:"perf script report task-analyzer --csv csv --extended-times" - Print standard task to csv file in csv format with additional schedule in/out information. - Check for additional information and csv format. test_csvsummary: - cmd:"perf script report task-analyzer --csv-summary csvsummary" - Print summary to csvsummary file in csv format. - Check for csv format. test_csvsummary_extended: - cmd:"perf script report task-analyzer --csv-summary csvsummary --summary-extended" - Print summary to csvsummary file in csv format with additional schedule in/out information. - Check for additional information and csv format. Suggested-by: Ian Rogers <irogers@google.com> Signed-off-by: Petar Gligoric <petar.gligoric@rohde-schwarz.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20221206154406.41941-4-petar.gligor@gmail.com Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
||
|
Petar Gligoric
|
fdd0f81f05 |
perf script: task-analyzer add csv support
This patch adds the possibility to write the trace and the summary as csv files
to a user specified file. A format as such simplifies further data processing.
This is achieved by having ";" as separators instead of spaces and solely one
header per file.
Additional parameters are being considered, like in the normal usage of the
script. Colors are turned off in the case of a csv output, thus the highlight
option is also being ignored.
Usage:
Write standard task to csv file:
$ perf script report tasks-analyzer --csv <file>
write limited output to csv file in nanoseconds:
$ perf script report tasks-analyzer --csv <file> --ns --limit-to-tasks 1337
Write summary to a csv file:
$ perf script report tasks-analyzer --csv-summary <file>
Write summary to csv file with additional schedule information:
$ perf script report tasks-analyzer --csv-summary <file> --summary-extended
Write both summary and standard task to a csv file:
$ perf script report tasks-analyzer --csv --csv-summary
The following examples illustrate what is possible with the CSV output. The
first command sequence will record all scheduler switch events for 10 seconds,
the task-analyzer calculates task information like runtimes as CSV. A small
python snippet using pandas and matplotlib will visualize the most frequent
task (e.g. kworker/1:1) runtimes - each runtime as a bar in a bar chart:
$ perf record -e sched:sched_switch -a -- sleep 10
$ perf script report tasks-analyzer --ns --csv tasks.csv
$ cat << EOF > /tmp/freq-comm-runtimes-bar.py
import pandas as pd
import matplotlib.pyplot as plt
df = pd.read_csv("tasks.csv", sep=';')
most_freq_comm = df["COMM"].value_counts().idxmax()
most_freq_runtimes = df[df["COMM"]==most_freq_comm]["Runtime"]
plt.title(f"Runtimes for Task {most_freq_comm} in Nanoseconds")
plt.bar(range(len(most_freq_runtimes)), most_freq_runtimes)
plt.show()
$ python3 /tmp/freq-comm-runtimes-bar.py
As a seconds example, the subsequent script generates a pie chart of all
accumulated tasks runtimes for 10 seconds of system recordings:
$ perf record -e sched:sched_switch -a -- sleep 10
$ perf script report tasks-analyzer --csv-summary task-summary.csv
$ cat << EOF > /tmp/accumulated-task-pie.py
import pandas as pd
from matplotlib.pyplot import pie, axis, show
df = pd.read_csv("task-summary.csv", sep=';')
sums = df.groupby(df["Comm"])["Accumulated"].sum()
axis("equal")
pie(sums, labels=sums.index);
show()
EOF
$ python3 /tmp/accumulated-task-pie.py
A variety of other visualizations are possible in matplotlib and other
environments. Of course, pandas, numpy and co. also allow easy
statistical analysis of the data!
Signed-off-by: Petar Gligoric <petar.gligoric@rohde-schwarz.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221206154406.41941-3-petar.gligor@gmail.com
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
||
Hagen Paul Pfeifer
|
e76aff0523 |
perf script: Introduce task analyzer python script
Introduce a new 'perf script' to analyze task scheduling behavior.
During the task analysis, some data is always needed - which goes beyond
the simple time of switching on and off a task (process/thread). This
concerns for example the runtime of a process or the frequency with
which the process was called. This script serves to simplify this
recurring analyze process. It immediately provides the user with helpful
task characteristic information about the tasks runtimes.
Usage:
Recorded can be in two ways:
$ perf script record tasks-analyzer -- sleep 10
$ perf record -e sched:sched_switch -a -- sleep 10
The script can parse all perf.data files, most important: sched:sched_switch
events are mandatory, other events will be ignored.
Most simple report use case is to just call the script without arguments:
$ perf script report tasks-analyzer
Switched-In Switched-Out CPU PID TID Comm Runtime Time Out-In
15576.658891407 15576.659156086 4 2412 2428 gdbus 265 1949
15576.659111320 15576.659455410 0 2412 2412 gnome-shell 344 2267
15576.659491326 15576.659506173 2 74 74 kworker/2:1 15 13145
15576.659506173 15576.659825748 2 2858 2858 gnome-terminal- 320 63263
15576.659871270 15576.659902872 6 20932 20932 kworker/u16:0 32 2314582
15576.659909951 15576.659945501 3 27264 27264 sh 36 -1
15576.659853285 15576.659971052 7 27265 27265 perf 118 5050741
[...]
What is not shown here are the ASCII color sequences. For example, if
the task consists of only one thread, the TID is grayed out.
Runtime is the time the task was running on the CPU, Time Out-In is the
time between the process being scheduled *out* and scheduled back *in*.
So the last time span between two executions. If -1 is printed, then the
task simply ran the first time in the measurements - a Out-In delta
could not be calculated.
In addition to the chronological representation, there is a summary on
task level. This output can be additionally switched on via the
--summary option and provides information such as max, min & average
runtime per process. The maximum runtime is often important for
debugging. The call looks like this:
$ perf script report tasks-analyzer --summary
Summary
Task Information Runtime Information
PID TID Comm Runs Accumulated Mean Median Min Max Max At
14 14 ksoftirqd/0 13 334 26 15 9 127 15571.621211956
15 15 rcu_preempt 133 1778 13 13 2 33 15572.581176024
16 16 migration/0 3 49 16 13 12 24 15571.608915425
20 20 migration/1 3 34 11 13 8 13 15571.639101555
25 25 migration/2 3 32 11 12 9 12 15575.639239896
[...]
Besides these two options, there are a number of other options that change the
output and behavior. This can be queried via --help. Options worth mentioning include:
- filter-tasks - filter out unneeded tasks, --filter-task 1337,/sbin/init
- highlight-tasks - more pleasant focusing, --highlight-tasks 1:red,mutt:yellow
- extended-times - show combinations of elapsed times between schedule in/schedule out
- summary-extended - summary with additional information, like maximum delta time statistics
- rename-comms-by-tids - handy for inexpressive processnames like python, --rename 1337:my-python-app
- ms - show timestamps in milliseconds, nanoseconds is also possible (--ns)
- time-limit - limit the analyzer to a time range, --time-limit 15576.0:15576.1
Script is tested and prime time ready for python2 & python3:
- make PYTHON=python3 prefix=/usr/local install
- make PYTHON=python2 prefix=/usr/local install
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221206154406.41941-2-petar.gligor@gmail.com
Signed-off-by: Petar Gligoric <petar.gligoric@rohde-schwarz.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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James Clark
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55c1de9973 |
perf cs-etm: Print auxtrace info even if OpenCSD isn't linked
Printing the info doesn't have any dependency on OpenCSD, and neither does recording Coresight data. Because it's sometimes useful to look at the info for debugging, it makes sense to be able to see it on the same platform that the recording was made on. So pull the auxtrace info printing parts into a new file that is always compiled into Perf. Signed-off-by: James Clark <james.clark@arm.com> Cc: Al Grant <Al.Grant@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20221212155513.2259623-6-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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James Clark
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fd63091f2a |
perf cs-etm: Cleanup cs_etm__process_auxtrace_info()
hdr is a copy of 3 values of ptr and doesn't need to be long lived. So just use ptr instead which means the malloc and the extra error path can be removed to simplify things. Signed-off-by: James Clark <james.clark@arm.com> Cc: Al Grant <Al.Grant@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20221212155513.2259623-5-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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James Clark
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b00204f5c2 |
perf cs-etm: Tidy up auxtrace info header printing
cs_etm__print_auxtrace_info() is called twice in case there is an error somewhere in cs_etm__process_auxtrace_info(), but all the info is already available at the beginning so just print it there instead. Also use u64 and the already cast ptr variable to make it more consistent with the rest of the etm code. Signed-off-by: James Clark <james.clark@arm.com> Cc: Al Grant <Al.Grant@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20221212155513.2259623-4-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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James Clark
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fe55ba1832 |
perf cs-etm: Remove unused stub methods
These aren't used outside of cs-etm so don't need stubs. Leave cs_etm__process_auxtrace_info() which is used externally, and add an error message so that it's obvious to users why it causes errors. Signed-off-by: James Clark <james.clark@arm.com> Cc: Al Grant <Al.Grant@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Will Deacon <will@kernel.org> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20221212155513.2259623-3-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |