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Date: Thu, 3 Mar 2016 11:38:08 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
Andi Kleen <ak@...ux.intel.com>,
Brendan Gregg <brendan.d.gregg@...il.com>,
David Ahern <dsahern@...il.com>, He Kuang <hekuang@...wei.com>,
Jeff Bastian <jbastian@...hat.com>,
Jeremie Galarneau <jeremie.galarneau@...icios.com>,
Jiri Olsa <jolsa@...nel.org>,
Josh Boyer <jwboyer@...oraproject.org>,
Lai Jiangshan <jiangshanlai@...il.com>,
Li Zefan <lizefan@...wei.com>,
Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <peterz@...radead.org>, pi3orama@....com,
Stephane Eranian <eranian@...gle.com>,
Steven Rostedt <rostedt@...dmis.org>,
Taeung Song <treeze.taeung@...il.com>,
Thomas Gleixner <tglx@...utronix.de>,
Wang Nan <wangnan0@...wei.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [GIT PULL 00/11] perf/core improvements and fixes
Em Thu, Mar 03, 2016 at 09:21:30AM +0100, Ingo Molnar escreveu:
> Hm, there's a 'perf stat' regression that I can see:
>
> Before:
> # 1.59 stalled cycles per insn
> 1,818,488,088 branches # 151.667 M/sec
>
> After:
>
> triton:~/tip> perf stat -a sleep 1
>
> 24166678 branches # 2.016 M/sec
>
> ... see how the numbers became human-unreadable, losing the big-number separator?
>
> I suspect it's due to the following commit:
>
> fa184776ac27 perf stat: Check existence of frontend/backed stalled cycles
Ok, I inserted Jiri's patch fixing the problem just before the commit
(fa184776ac27) that triggers it, so that we don't break bisection for
human-readable numbers in 'perf stat'.
Its all in a new signed tag, that combines the two outstanding ones
(perf-core-for-mingo-20160229 + perf-core-for-mingo-20160302), please
consider pulling.
- Arnaldo
The following changes since commit 675965b00d734c985e4285f5bec7e524d15fc4e1:
perf: Export perf_event_sysfs_show() (2016-02-29 09:35:27 +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-20160303
for you to fetch changes up to fb4605ba47e772ff9d62d1d54218a832ec8b3e1d:
perf stat: Check for frontend stalled for metrics (2016-03-03 11:10:40 -0300)
----------------------------------------------------------------
perf/core improvements and fixes:
User visible:
- Check existence of frontend/backed stalled cycles in 'perf stat' (Andi Kleen)
- Implement CSV metrics output in 'perf stat' (Andi Kleen)
- Support metrics in 'perf stat' --per-core/socket mode (Andi Kleen)
- Avoid installing .o files from tools/lib/ into the python extension (Jiri Olsa)
- Rename the tracepoint '/format' field that carries the syscall ID from 'nr',
that is also the name of some syscalls arguments, to "__syscall_nr", to
avoid having multiple fields with the same name, that was breaking the
python script skeleton generator from perf.data files (Taeung Song)
- Support converting data from bpf events in 'perf data' (Wang Nan)
- Fix segfault in 'perf test' hists related entries (Arnaldo Carvalho de Melo)
- Fix output of %llu for 64 bit values read on 32 bit machines in libtraceevent (Steven Rostedt)
- Fix time stamp rounding issue in libtraceevent (Chaos.Chen)
Infrastructure:
- Fix setlocale() breakage in the pmu parsing code (Jiri Olsa)
- Split libtraceevent's pevent_print_event() (Steven Rostedt)
- Librarize some 'perf record' bits to allow handling multiple perf.data
files per session (Wang Nan)
- Ensure return non-zero rc when mmap fails in 'perf record' (Wang Nan)
- Fix double free on 'command_line' in a error path in 'perf script' (Colin Ian King)
- Initialize struct sigaction 'sa_flags' field in a 'perf test' entry (Colin Ian King)
- Fix various build warnings in turbostat, detected with gcc6 (Colin Ian King)
- Use .s extension for preprocessed assembler code (Masahiro Yamada)
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
----------------------------------------------------------------
Andi Kleen (4):
perf stat: Check existence of frontend/backed stalled cycles
perf stat: Implement CSV metrics output
perf stat: Support metrics in --per-core/socket mode
perf stat: Check for frontend stalled for metrics
Arnaldo Carvalho de Melo (1):
perf test: Fix hists related entries
Chaos.Chen (1):
tools lib traceevent: Fix time stamp rounding issue
Colin Ian King (3):
perf script: Fix double free on command_line
perf tests: Initialize sa.sa_flags
tools/power turbostat: fix various build warnings
Jiri Olsa (2):
perf tools: Fix python extension build
perf tools: Fix locale handling in pmu parsing
Masahiro Yamada (1):
tools build: Use .s extension for preprocessed assembler code
Steven Rostedt (1):
tools lib traceevent: Split pevent_print_event() into specific functionality functions
Steven Rostedt (Red Hat) (2):
tools lib traceevent: Set int_array fields to NULL if freeing from error
tools lib traceevent: Fix output of %llu for 64 bit values read on 32 bit machines
Taeung Song (2):
perf trace: Check and discard not only 'nr' but also '__syscall_nr'
tracing/syscalls: Rename "/format" tracepoint field name "nr" to "__syscall_nr:
Wang Nan (6):
perf data: Support converting data from bpf_perf_event_output()
perf data: Explicitly set byte order for integer types
perf record: Use WARN_ONCE to replace 'if' condition
perf record: Extract synthesize code to record__synthesize()
perf record: Introduce record__finish_output() to finish a perf.data
perf record: Ensure return non-zero rc when mmap fail
kernel/trace/trace_syscalls.c | 16 +-
tools/build/Makefile.build | 2 +-
tools/lib/traceevent/event-parse.c | 146 ++++++++++++++----
tools/lib/traceevent/event-parse.h | 13 ++
tools/perf/arch/x86/tests/rdpmc.c | 1 +
tools/perf/builtin-record.c | 168 ++++++++++++---------
tools/perf/builtin-stat.c | 158 +++++++++++++++++--
tools/perf/builtin-trace.c | 8 +-
tools/perf/util/data-convert-bt.c | 118 ++++++++++++++-
tools/perf/util/pmu.c | 13 ++
.../util/scripting-engines/trace-event-python.c | 4 +-
tools/perf/util/setup.py | 4 +
tools/perf/util/sort.c | 37 +++--
tools/perf/util/stat-shadow.c | 18 ++-
tools/perf/util/stat.h | 1 +
tools/power/x86/turbostat/turbostat.c | 8 +-
16 files changed, 566 insertions(+), 149 deletions(-)
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