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Date: Thu, 12 Jan 2017 09:25:51 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...hat.com>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Ladi Prosek <lprosek@...hat.com>,
Laura Abbott <labbott@...hat.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Milian Wolff <milian.wolff@...b.com>,
Namhyung Kim <namhyung.kim@....com>,
Paolo Bonzini <pbonzini@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Soramichi AKIYAMA <akiyama@...oramichi.jp>,
Wang Nan <wangnan0@...wei.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [GIT PULL 00/13] perf/core improvements and fixes
* Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> Hi Ingo,
>
> Please consider pulling,
>
> - Arnaldo
>
> Test results at the end of this message, as usual.
>
> * The following description will move to the end in the next pull requests *
>
> The first ones are container (docker) based builds of tools/perf with and
> without libelf support, objtool where it is supported and samples/bpf/, ditto.
>
> Several are cross builds, the ones with -x-ARCH, and the android one, and those
> may not have all the features built, due to lack of multi-arch devel packages,
> available and being used so far on just a few, like
> debian:experimental-x-{arm64,mipsel}.
>
> The 'perf test' one will perform a variety of tests exercising
> tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf commands
> with a variety of command line event specifications to then intercept the
> sys_perf_event syscall to check that the perf_event_attr fields are set up as
> expected, among a variety of other unit tests.
>
> Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
> with a variety of feature sets, exercising the build with an incomplete set of
> features as well as with a complete one. It is planned to have it run on each
> of the containers mentioned above, using some container orchestration
> infrastructure. Get in contact if interested in helping having this in place.
>
> The following changes since commit ad5013d5699d30ded0cdbbc68b93b2aa28222c6e:
>
> perf/x86/intel: Use ULL constant to prevent undefined shift behaviour (2017-01-11 16:43:30 +0100)
>
> are available in the git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-4.11-20170111
>
> for you to fetch changes up to 675f52b23743f396c585fc9d135435be37f320d8:
>
> tools: Sync x86's vmx.h with the kernel (2017-01-11 16:48:02 -0300)
>
> ----------------------------------------------------------------
> perf/core improvements and fixes:
>
> 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@...et ~] # 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@...et ~]#
>
> (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@...hat.com>
>
> ----------------------------------------------------------------
> Arnaldo Carvalho de Melo (5):
> tools lib subcmd: Add missing linux/kernel.h include to subcmd.h
> perf machine: Add a kallsyms loading constructor
> perf kallsyms: Introduce tool to look for extended symbol information on the running kernel
> perf trace: Allow specifying list of syscalls and events in -e/--expr/--event
> tools: Sync x86's vmx.h with the kernel
>
> Jiri Olsa (6):
> perf tools: Add unit_number__scnprintf function
> perf record: Add struct switch_output
> perf record: Change switch-output option to take optional argument
> perf record: Add switch-output size option argument
> perf record: Add switch-output size warning
> perf record: Add switch-output time option argument
>
> Laura Abbott (1):
> perf jvmti: Create libdir directory before installing libperf-jvmti.so
>
> Soramichi Akiyama (1):
> perf evlist: Fix typo in perf_evlist__start_workload()
>
> tools/arch/x86/include/uapi/asm/vmx.h | 5 +
> tools/lib/subcmd/parse-options.h | 1 +
> tools/perf/Build | 1 +
> tools/perf/Documentation/perf-kallsyms.txt | 24 +++++
> tools/perf/Documentation/perf-record.txt | 14 ++-
> tools/perf/Documentation/perf-trace.txt | 8 +-
> tools/perf/Makefile.perf | 1 +
> tools/perf/builtin-help.c | 2 +-
> tools/perf/builtin-kallsyms.c | 67 +++++++++++++
> tools/perf/builtin-record.c | 154 ++++++++++++++++++++++++++---
> tools/perf/builtin-trace.c | 120 ++++++++++++++++------
> tools/perf/builtin.h | 1 +
> tools/perf/command-list.txt | 1 +
> tools/perf/perf.c | 1 +
> tools/perf/tests/Build | 1 +
> tools/perf/tests/builtin-test.c | 4 +
> tools/perf/tests/tests.h | 1 +
> tools/perf/tests/unit_number__scnprintf.c | 37 +++++++
> tools/perf/util/evlist.c | 12 ++-
> tools/perf/util/evlist.h | 2 +
> tools/perf/util/machine.c | 19 ++++
> tools/perf/util/machine.h | 1 +
> tools/perf/util/util.c | 13 +++
> tools/perf/util/util.h | 1 +
> 24 files changed, 439 insertions(+), 52 deletions(-)
> create mode 100644 tools/perf/Documentation/perf-kallsyms.txt
> create mode 100644 tools/perf/builtin-kallsyms.c
> create mode 100644 tools/perf/tests/unit_number__scnprintf.c
Pulled, thanks a lot Arnaldo!
Ingo
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