f913f3a655
New features:
- Add more triggers to switch the output file (perf.data.TIMESTAMP).
Now, in addition to switching to a different output file when
receiving a SIGUSR2, one can also specify file size and time based
triggers:
perf record -a --switch-output=signal
is equivalent to what we had before:
perf record -a --switch-output
While we can also ask for the file to be "sliced" by size, taking
into account that that will happen only when we get woken up by
the kernel, i.e. one has to take into account the --mmap-pages (the
size of the perf mmap ring buffer):
perf record -a --switch-output=2G
will break the perf.data output into multiple files limited to 2GB
of samples, right when generating the output.
For time based samples, alert() will be used, so to have 1 minute
limited perf.data output files:
perf record -a --switch-output=1m
(Jiri Olsa)
- Remove the need to use -e only for syscalls and --event only for
tracepoints/HW/SW/etc events, i.e. now one can use:
perf trace -e nanosleep,futex,sched:sched_switch ./workload
or:
perf trace --event nanosleep,futex,sched:sched_switch ./workload
And have it tracing raw_syscalls:sys_{enter,exit} for the nanosleep
and futex syscalls, formatting those as strace does while also
tracing sched:sched_switch, ordering it all into one strace like
output.
Using '!' as the first character in the -e/--event argument remains
a way to negate the list of syscalls, i.e. all syscalls except for
the ones specified, doesn't affect the other kinds of events.
E.g:
[root@jouet ~] # perf trace -e sched:sched_switch,nanosleep usleep 1
0.000 ( 0.028 ms): usleep/28150 nanosleep(rqtp: 0x7ffe4201b9f0) ...
0.028 ( ): sched:sched_switch:usleep:28150 [120] S ==> swapper/0:0 [120])
0.000 ( 0.065 ms): usleep/28150 ... [continued]: nanosleep()) = 0
[root@jouet ~]#
(Arnaldo Carvalho de Melo)
- 'perf kallsyms' toy tool to look for extended symbol information on
the running kernel and demonstrate the machine/thread/symbol APIs for
use in other tools, such as 'perf probe' (Arnaldo Carvalho de Melo)
Infrastructure:
- Add missing linux/kernel.h include to subcmd.h (Arnaldo Carvalho de Melo)
tools: Sync x86's vmx.h with the kernel
- Create libdir directory before installing libperf-jvmti.so (Laura Abbott)
- Fix typo in perf_evlist__start_workload() (Soramichi Akiyama)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=MfnZ
-----END PGP SIGNATURE-----
Merge tag 'perf-core-for-mingo-4.11-20170111' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
New features:
- Add more triggers to switch the output file (perf.data.TIMESTAMP).
Now, in addition to switching to a different output file when
receiving a SIGUSR2, one can also specify file size and time based
triggers:
perf record -a --switch-output=signal
is equivalent to what we had before:
perf record -a --switch-output
While we can also ask for the file to be "sliced" by size, taking
into account that that will happen only when we get woken up by
the kernel, i.e. one has to take into account the --mmap-pages (the
size of the perf mmap ring buffer):
perf record -a --switch-output=2G
will break the perf.data output into multiple files limited to 2GB
of samples, right when generating the output.
For time based samples, alert() will be used, so to have 1 minute
limited perf.data output files:
perf record -a --switch-output=1m
(Jiri Olsa)
- Remove the need to use -e only for syscalls and --event only for
tracepoints/HW/SW/etc events, i.e. now one can use:
perf trace -e nanosleep,futex,sched:sched_switch ./workload
or:
perf trace --event nanosleep,futex,sched:sched_switch ./workload
And have it tracing raw_syscalls:sys_{enter,exit} for the nanosleep
and futex syscalls, formatting those as strace does while also
tracing sched:sched_switch, ordering it all into one strace like
output.
Using '!' as the first character in the -e/--event argument remains
a way to negate the list of syscalls, i.e. all syscalls except for
the ones specified, doesn't affect the other kinds of events.
E.g:
[root@jouet ~] # perf trace -e sched:sched_switch,nanosleep usleep 1
0.000 ( 0.028 ms): usleep/28150 nanosleep(rqtp: 0x7ffe4201b9f0) ...
0.028 ( ): sched:sched_switch:usleep:28150 [120] S ==> swapper/0:0 [120])
0.000 ( 0.065 ms): usleep/28150 ... [continued]: nanosleep()) = 0
[root@jouet ~]#
(Arnaldo Carvalho de Melo)
- 'perf kallsyms' toy tool to look for extended symbol information on
the running kernel and demonstrate the machine/thread/symbol APIs for
use in other tools, such as 'perf probe' (Arnaldo Carvalho de Melo)
Infrastructure improvements:
- Add missing linux/kernel.h include to subcmd.h (Arnaldo Carvalho de Melo)
tools: Sync x86's vmx.h with the kernel
- Create libdir directory before installing libperf-jvmti.so (Laura Abbott)
- Fix typo in perf_evlist__start_workload() (Soramichi Akiyama)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.