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Message-ID: <20160531072457.GA8975@gmail.com> Date: Tue, 31 May 2016 09:24:57 +0200 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>, Alexei Starovoitov <ast@...nel.org>, Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>, Andi Kleen <ak@...ux.intel.com>, Brendan Gregg <brendan.d.gregg@...il.com>, David Ahern <dsahern@...il.com>, Frederic Weisbecker <fweisbec@...il.com>, He Kuang <hekuang@...wei.com>, Hemant Kumar <hemant@...ux.vnet.ibm.com>, Jiri Olsa <jolsa@...hat.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Masami Hiramatsu <mhiramat@...nel.org>, Milian Wolff <milian.wolff@...b.com>, Namhyung Kim <namhyung@...nel.org>, Peter Zijlstra <peterz@...radead.org>, pi3orama@....com, Stephane Eranian <eranian@...gle.com>, Taeung Song <treeze.taeung@...il.com>, Thomas Gleixner <tglx@...utronix.de>, Vince Weaver <vincent.weaver@...ne.edu>, Wang Nan <wangnan0@...wei.com>, Zefan Li <lizefan@...wei.com>, Arnaldo Carvalho de Melo <acme@...hat.com> Subject: Re: [GIT PULL 00/12] perf/core improvements and fixes * Arnaldo Carvalho de Melo <acme@...nel.org> wrote: > Hi Ingo, > > Please consider pulling, > > - Arnaldo > > The following changes since commit 711460514b1c80494f14001bdf30dd70fd401a8f: > > Merge tag 'perf-urgent-for-mingo-20160527' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent (2016-05-29 20:15:37 +0200) > > are available in the git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-20160530 > > for you to fetch changes up to 01412261d99497021353c4b1d67e8df6c9cdc3c6: > > perf buildid-cache: Use path/to/bin/buildid/elf instead of path/to/bin/buildid (2016-05-30 13:15:03 -0300) > > ---------------------------------------------------------------- > perf/core improvements and fixes: > > User visible/kernel ABI: > > - Per event callchain limit: Recently we introduced a sysctl to tune the > max-stack for all events for which callchains were requested: > > $ sysctl kernel.perf_event_max_stack > kernel.perf_event_max_stack = 127 > > Now this patch introduces a way to configure this per event, i.e. this > becomes possible: > > $ perf record -e sched:*/max-stack=2/ -e block:*/max-stack=10/ -a > > allowing finer tuning of how much buffer space callchains use. > > This uses an u16 from the reserved space at the end, leaving another > u16 for future use. > > There has been interest in even finer tuning, namely to control the > max stack for kernel and userspace callchains separately. Further > discussion is needed, we may for instance use the remaining u16 for > that and when it is present, assume that the sample_max_stack introduced > in this patch applies for the kernel, and the u16 left is used for > limiting the userspace callchain. (Arnaldo Carvalho de Melo) > > Infrastructure: > > - Adopt get_main_thread from db-export.c (Andi Kleen) > > - More prep work for backward ring buffer support (Wang Nan) > > - Prep work for supporting SDT (Statically Defined Tracing) > tracepoints (Masami Hiramatsu) > > - Add arch/*/include/generated/ to .gitignore (Taeung Song) > > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> > > ---------------------------------------------------------------- > Andi Kleen (1): > perf thread: Adopt get_main_thread from db-export.c > > Arnaldo Carvalho de Melo (2): > perf core: Per event callchain limit > perf tools: Per event max-stack settings > > Masami Hiramatsu (3): > perf symbols: Introduce filename__readable to check readability > perf symbols: Cleanup the code flow of dso__find_kallsyms > perf buildid-cache: Use path/to/bin/buildid/elf instead of path/to/bin/buildid > > Taeung Song (1): > perf tools: Add arch/*/include/generated/ to .gitignore > > Wang Nan (5): > perf record: Robustify perf_event__synth_time_conv() > perf evlist: Don't poll and mmap overwritable events > perf evlist: Check 'base' pointer before checking refcnt when put a mmap > perf evlist: Choose correct reading direction according to evlist->backward > tools: Pass arg to fdarray__filter's call back function > > include/linux/perf_event.h | 2 +- > include/uapi/linux/perf_event.h | 6 ++- > kernel/bpf/stackmap.c | 2 +- > kernel/events/callchain.c | 14 ++++- > kernel/events/core.c | 5 +- > tools/lib/api/fd/array.c | 5 +- > tools/lib/api/fd/array.h | 3 +- > tools/perf/.gitignore | 1 + > tools/perf/arch/x86/util/tsc.c | 2 + > tools/perf/builtin-record.c | 9 +++- > tools/perf/tests/fdarray.c | 8 +-- > tools/perf/util/build-id.c | 115 ++++++++++++++++++++++++++++++---------- > tools/perf/util/build-id.h | 2 + > tools/perf/util/callchain.h | 1 + > tools/perf/util/db-export.c | 13 +---- > tools/perf/util/dso.h | 5 ++ > tools/perf/util/evlist.c | 43 +++++++++++---- > tools/perf/util/evlist.h | 2 + > tools/perf/util/evsel.c | 16 +++++- > tools/perf/util/evsel.h | 2 + > tools/perf/util/parse-events.c | 8 +++ > tools/perf/util/parse-events.h | 1 + > tools/perf/util/parse-events.l | 1 + > tools/perf/util/session.c | 2 + > tools/perf/util/symbol.c | 71 ++++++++++++------------- > tools/perf/util/thread.c | 11 ++++ > tools/perf/util/thread.h | 2 + > 27 files changed, 252 insertions(+), 100 deletions(-) Pulled, thanks a lot Arnaldo! Ingo
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