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Zhengjun Xing 9a0b36266f perf stat: Add topdown metrics in the default perf stat on the hybrid machine 
Topdown metrics are missed in the default perf stat on the hybrid machine,
add Topdown metrics in default perf stat for hybrid systems.

Currently, we support the perf metrics Topdown for the p-core PMU in the
perf stat default, the perf metrics Topdown support for e-core PMU will be
implemented later separately. Refactor the code adds two x86 specific
functions. Widen the size of the event name column by 7 chars, so that all
metrics after the "#" become aligned again.

The perf metrics topdown feature is supported on the cpu_core of ADL. The
dedicated perf metrics counter and the fixed counter 3 are used for the
topdown events. Adding the topdown metrics doesn't trigger multiplexing.

Before:

 # ./perf  stat  -a true

 Performance counter stats for 'system wide':

             53.70 msec cpu-clock                 #   25.736 CPUs utilized
                80      context-switches          #    1.490 K/sec
                24      cpu-migrations            #  446.951 /sec
                52      page-faults               #  968.394 /sec
         2,788,555      cpu_core/cycles/          #   51.931 M/sec
           851,129      cpu_atom/cycles/          #   15.851 M/sec
         2,974,030      cpu_core/instructions/    #   55.385 M/sec
           416,919      cpu_atom/instructions/    #    7.764 M/sec
           586,136      cpu_core/branches/        #   10.916 M/sec
            79,872      cpu_atom/branches/        #    1.487 M/sec
            14,220      cpu_core/branch-misses/   #  264.819 K/sec
             7,691      cpu_atom/branch-misses/   #  143.229 K/sec

       0.002086438 seconds time elapsed

After:

 # ./perf stat  -a true

 Performance counter stats for 'system wide':

             61.39 msec cpu-clock                        #   24.874 CPUs utilized
                76      context-switches                 #    1.238 K/sec
                24      cpu-migrations                   #  390.968 /sec
                52      page-faults                      #  847.097 /sec
         2,753,695      cpu_core/cycles/                 #   44.859 M/sec
           903,899      cpu_atom/cycles/                 #   14.725 M/sec
         2,927,529      cpu_core/instructions/           #   47.690 M/sec
           428,498      cpu_atom/instructions/           #    6.980 M/sec
           581,299      cpu_core/branches/               #    9.470 M/sec
            83,409      cpu_atom/branches/               #    1.359 M/sec
            13,641      cpu_core/branch-misses/          #  222.216 K/sec
             8,008      cpu_atom/branch-misses/          #  130.453 K/sec
        14,761,308      cpu_core/slots/                  #  240.466 M/sec
         3,288,625      cpu_core/topdown-retiring/       #     22.3% retiring
         1,323,323      cpu_core/topdown-bad-spec/       #      9.0% bad speculation
         5,477,470      cpu_core/topdown-fe-bound/       #     37.1% frontend bound
         4,679,199      cpu_core/topdown-be-bound/       #     31.7% backend bound
           646,194      cpu_core/topdown-heavy-ops/      #      4.4% heavy operations       #     17.9% light operations
         1,244,999      cpu_core/topdown-br-mispredict/  #      8.4% branch mispredict      #      0.5% machine clears
         3,891,800      cpu_core/topdown-fetch-lat/      #     26.4% fetch latency          #     10.7% fetch bandwidth
         1,879,034      cpu_core/topdown-mem-bound/      #     12.7% memory bound           #     19.0% Core bound

       0.002467839 seconds time elapsed

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220721065706.2886112-6-zhengjun.xing@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-07-29 13:43:34 -03:00
arch s390 updates for 5.19 2022-07-26 10:03:53 -07:00
block block: fix missing blkcg_bio_issue_init 2022-07-14 10:54:49 -06:00
certs certs: make system keyring depend on x509 parser 2022-07-24 12:53:55 -07:00
crypto crypto: s390 - do not depend on CRYPTO_HW for SIMD implementations 2022-07-06 20:04:06 -07:00
Documentation * Check for invalid flags to KVM_CAP_X86_USER_SPACE_MSR 2022-07-23 10:22:26 -07:00
drivers - Make retbleed mitigations 64-bit only (32-bit will need a bit more 2022-07-24 09:40:17 -07:00
fs Thirteen hotfixes, Eight are cc:stable and the remainder are for post-5.18 2022-07-26 19:38:46 -07:00
include Thirteen hotfixes, Eight are cc:stable and the remainder are for post-5.18 2022-07-26 19:38:46 -07:00
init gcc-12: disable '-Warray-bounds' universally for now 2022-06-09 10:11:12 -07:00
ipc ipc: Free mq_sysctls if ipc namespace creation failed 2022-06-22 17:47:41 -05:00
kernel A single fix to correct a wrong BUG_ON() condition for deboosted tasks. 2022-07-24 09:50:53 -07:00
lib ubsan: disable UBSAN_DIV_ZERO for clang 2022-07-14 15:45:26 -07:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm Thirteen hotfixes, Eight are cc:stable and the remainder are for post-5.18 2022-07-26 19:38:46 -07:00
net net/sched: cls_api: Fix flow action initialization 2022-07-20 10:54:27 +01:00
samples Fixes and minor clean ups for tracing: 2022-07-12 16:17:40 -07:00
scripts scripts/gdb: Fix gdb 'lx-symbols' command 2022-07-21 10:40:55 -07:00
security lockdown: Fix kexec lockdown bypass with ima policy 2022-07-20 09:56:48 -07:00
sound ASoC: Drop Rockchip BCLK management for v5.19 2022-07-15 12:31:07 +02:00
tools perf stat: Add topdown metrics in the default perf stat on the hybrid machine 2022-07-29 13:43:34 -03:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: x86: disable preemption around the call to kvm_arch_vcpu_{un|}blocking 2022-06-09 10:52:20 -04:00
.clang-format clang-format: Fix space after for_each macros 2022-05-20 19:27:16 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap Thirteen hotfixes, Eight are cc:stable and the remainder are for post-5.18 2022-07-26 19:38:46 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: mark ARM/PALM TREO SUPPORT orphan 2022-07-07 15:17:00 +02:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Pin control fixes for the v5.19 kernel cycle: 2022-07-22 12:24:04 -07:00
Makefile Linux 5.19-rc8 2022-07-24 13:26:27 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.