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Date: Tue, 3 Mar 2015 07:20:18 +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>, Andi Kleen <ak@...ux.intel.com>, Borislav Petkov <bp@...e.de>, David Ahern <david.ahern@...cle.com>, Don Zickus <dzickus@...hat.com>, Frederic Weisbecker <fweisbec@...il.com>, He Kuang <hekuang@...wei.com>, "H . Peter Anvin" <hpa@...or.com>, Jiri Olsa <jolsa@...hat.com>, Kaixu Xia <xiakaixu@...wei.com>, Kan Liang <kan.liang@...el.com>, Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>, Namhyung Kim <namhyung@...nel.org>, Naohiro Aota <naota@...sp.net>, Peter Zijlstra <peterz@...radead.org>, Stephane Eranian <eranian@...gle.com>, "Suzuki K . Poulose" <suzuki.poulose@....com>, Thomas Gleixner <tglx@...utronix.de>, Arnaldo Carvalho de Melo <acme@...hat.com> Subject: Re: [GIT PULL 00/20] perf/core improvements and fixes * Arnaldo Carvalho de Melo <acme@...nel.org> wrote: > Hi Ingo, > > This one has the thread reference counting, that I tested using 'perf probe': > > perf probe -x ~/bin/perf 'thread__delete:4 thread refcnt=thread->refcnt tid=thread->tid' > perf probe -x ~/bin/perf 'thread__get:1 thread refcnt=thread->refcnt tid=thread->tid' > perf probe -x ~/bin/perf 'thread__put:6 thread refcnt=thread->refcnt tid=thread->tid' > perf record -o thread_refcnt.data -g -e probe_perf:thread__put,probe_perf:thread__get_1,probe_perf:thread__delete perf top > > with that I checked and in the end the refcount reaches zero and > thread__delete is called, as expected, using 'perf script', looking at the > callchains, etc, did the same for 'perf sched lat' and 'trace' also seems to > work. > > David, Namhyung, please holler if you find something fishy with this > thread refcnt stuff, as it is something that is related to previous/current > work by you guys, > > Ah, I also merged perf/urgent so that it is buildable in more systems.o > > There is also the revert for that is_power_of_2 "simplification" in perf_mmap, > that hasn't made it to perf/urgent nor upstream, its something only in perf/core, sorry > about that one, should have caught that :-\ > > Please consider pulling, > > - Arnaldo > The following changes since commit 33be4ef116511f1079c4c3bf4b5547faf7439301: > > Merge 'tip/perf/urgent' into perf/core to pick fixes (2015-03-02 11:45:49 -0300) > > are available in the git repository at: > > > git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo > > for you to fetch changes up to ae536acfacb65a4a9858c32b12361e09f84f4157: > > perf sched: No need to keep the session around (2015-03-03 00:17:12 -0300) > > ---------------------------------------------------------------- > perf/core improvements and fixes: > > User visible: > > - Warn if given uprobe event accesses memory on older kernel (Masami Hiramatsu) > > - 'perf record' Documentation fixes (Namhyung Kim) > > - Report unsupported events properly in 'perf stat' (Suzuki K. Poulose) > > Infrastructure: > > - Avoid FORK after COMM when synthesizing records for pre-existing threads (Arnaldo Carvalho de Melo) > > - Reference count struct thread (Arnaldo Carvalho de Melo) > > - No need to keep the session around in 'perf sched', thread refcounting removes that need (Arnaldo Carvalho de Melo) > > - Initialize cpu set in pthread_attr_setaffinity_np feature test (Adrian Hunter) > > - Only include tsc file for x86 (David Ahern) > > - Compare JOBS to 0 after grep (David Ahern) > > - Improve feature detection messages (Ingo Molnar) > > - Revert "perf: Remove the extra validity check on nr_pages" (Kan Liang) > > - Remove bias offset to find probe point by address (Masami Hiramatsu) > > - Fix build error on ARCH=i386/x86_64/sparc64 )Namhyung Kim) > > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> > > ---------------------------------------------------------------- > Adrian Hunter (1): > perf tools: Initialize cpu set in pthread_attr_setaffinity_np feature test > > Arnaldo Carvalho de Melo (3): > perf tools: Fix FORK after COMM when synthesizing records for pre-existing threads > perf tools: Reference count struct thread > perf sched: No need to keep the session around > > David Ahern (2): > perf tools: Only include tsc file for x86 > perf tools: Compare JOBS to 0 after grep > > Ingo Molnar (7): > perf tools: Add PERF-FEATURES to the .gitignore file > perf tools: Remove annoying extra message from the features build > perf tools: Improve Python feature detection messages > perf tools: Improve libperl detection message > perf tools: Improve libbfd detection message > perf tools: Improve feature test debuggability > perf tools: Improve 'libbabel' feature check failure message > > Kan Liang (1): > Revert "perf: Remove the extra validity check on nr_pages" > > Masami Hiramatsu (2): > perf probe: Warn if given uprobe event accesses memory on older kernel > perf probe: Remove bias offset to find probe point by address > > Namhyung Kim (3): > perf tools: Fix build error on ARCH=i386/x86_64/sparc64 > perf record: Get rid of -l option from Documentation > perf record: Document --group option > > Suzuki K. Poulose (1): > perf stat: Report unsupported events properly > > kernel/events/core.c | 2 +- > tools/perf/.gitignore | 1 + > tools/perf/Documentation/perf-record.txt | 12 ++++-- > tools/perf/Makefile | 2 +- > tools/perf/builtin-sched.c | 26 +++++-------- > tools/perf/builtin-stat.c | 5 ++- > tools/perf/builtin-trace.c | 7 +++- > tools/perf/config/Makefile | 17 ++++----- > tools/perf/config/Makefile.arch | 27 +++---------- > tools/perf/config/feature-checks/Makefile | 16 ++++---- > .../test-pthread-attr-setaffinity-np.c | 4 +- > tools/perf/config/utilities.mak | 3 +- > tools/perf/ui/browsers/hists.c | 6 +-- > tools/perf/util/Build | 2 +- > tools/perf/util/build-id.c | 5 ++- > tools/perf/util/event.c | 34 ++++++++++++----- > tools/perf/util/hist.c | 2 + > tools/perf/util/hist.h | 2 +- > tools/perf/util/machine.c | 44 +++++++++++----------- > tools/perf/util/machine.h | 1 - > tools/perf/util/probe-event.c | 23 +++++++++++ > tools/perf/util/probe-finder.c | 5 +-- > tools/perf/util/session.c | 6 --- > tools/perf/util/thread.c | 14 +++++++ > tools/perf/util/thread.h | 13 +++++++ > 25 files changed, 164 insertions(+), 115 deletions(-) Pulled, thanks a lot Arnaldo! Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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