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Date: Wed, 27 Apr 2016 17:03:29 +0200 From: Ingo Molnar <mingo@...nel.org> To: Arnaldo Carvalho de Melo <acme@...nel.org> Cc: linux-kernel@...r.kernel.org, Arnaldo Carvalho de Melo <acme@...hat.com>, 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>, Andrey Ryabinin <aryabinin@...tuozzo.com>, Borislav Petkov <bp@...e.de>, Brendan Gregg <brendan.d.gregg@...il.com>, Chris Phlipot <cphlipot0@...il.com>, Colin Ian King <colin.king@...onical.com>, David Ahern <dsahern@...il.com>, Davidlohr Bueso <dbueso@...e.de>, Eric Engestrom <eric.engestrom@...tec.com>, Frederic Weisbecker <fweisbec@...il.com>, He Kuang <hekuang@...wei.com>, Hemant Kumar <hemant@...ux.vnet.ibm.com>, Hitoshi Mitake <mitake@....info.waseda.ac.jp>, Jiri Olsa <jolsa@...hat.com>, Kan Liang <kan.liang@...el.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Masami Hiramatsu <mhiramat@...nel.org>, Milian Wolff <milian.wolff@...b.com>, Namhyung Kim <namhyung@...nel.org>, "Naveen N . Rao" <naveen.n.rao@...ux.vnet.ibm.com>, Peter Zijlstra <peterz@...radead.org>, pi3orama@....com, Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>, Srikar Dronamraju <srikar@...ux.vnet.ibm.com>, Stephane Eranian <eranian@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, TJ <linux@....tj>, Vince Weaver <vincent.weaver@...ne.edu>, Wang Nan <wangnan0@...wei.com>, Zefan Li <lizefan@...wei.com> Subject: Re: [GIT PULL 00/30] perf/core improvements and fixes * Arnaldo Carvalho de Melo <acme@...nel.org> wrote: > From: Arnaldo Carvalho de Melo <acme@...hat.com> > > Hi Ingo, > > Please consider pulling, > > - Arnaldo > > The following changes since commit 67d61296ffcc850bffdd4466430cb91e5328f39a: > > Merge tag 'perf-core-for-mingo-20160419' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux (2016-04-23 14:50:39 +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-20160427 > > for you to fetch changes up to 4cb93446c587d56e2a54f4f83113daba2c0b6dee: > > perf tools: Set the maximum allowed stack from /proc/sys/kernel/perf_event_max_stack (2016-04-27 10:29:07 -0300) > > ---------------------------------------------------------------- > perf/core improvements and fixes: > > User visible: > > - perf trace --pf maj/min/all works with --call-graph: (Arnaldo Carvalho de Melo) > > Tracing write syscalls and major page faults with callchains while starting > firefox, limiting the stack to 5 frames: > > # perf trace -e write --pf maj --max-stack 5 firefox > 589.549 ( 0.014 ms): firefox/15377 write(fd: 4, buf: 0x7fff80acc898, count: 151) = 151 > [0xfaed] (/usr/lib64/libpthread-2.22.so) > fire_glxtest_process+0x5c (/usr/lib64/firefox/libxul.so) > InstallGdkErrorHandler+0x41 (/usr/lib64/firefox/libxul.so) > XREMain::XRE_mainInit+0x12c (/usr/lib64/firefox/libxul.so) > XREMain::XRE_main+0x1e4 (/usr/lib64/firefox/libxul.so) > 760.704 ( 0.000 ms): firefox/15332 majfault [gtk_tree_view_accessible_get_type+0x0] => /usr/lib64/libgtk-3.so.0.1800.9@...0850 (x.) > gtk_tree_view_accessible_get_type+0x0 (/usr/lib64/libgtk-3.so.0.1800.9) > gtk_tree_view_class_intern_init+0x1a54 (/usr/lib64/libgtk-3.so.0.1800.9) > g_type_class_ref+0x6dd (/usr/lib64/libgobject-2.0.so.0.4600.2) > [0x115378] (/usr/lib64/libgnutls.so.30.6.3) > > This automagically selects "--call-graph dwarf", use "--call-graph fp" on systems > where -fno-omit-frame-pointer was used to built the components of interest, to > incur in less overhead, or tune "--call-graph dwarf" appropriately, see 'perf record --help'. > > - Allow /proc/sys/kernel/perf_event_max_stack, that defaults to the old hard coded value > of PERF_MAX_STACK_DEPTH (127), useful for huge callstacks for things like Groovy, Ruby, etc, > and also to reduce overhead by limiting it to a smaller value, upcoming work will allow > this to be done per-event (Arnaldo Carvalho de Melo) > > - Make 'perf trace --min-stack' be honoured by --pf and --event (Arnaldo Carvalho de Melo) > > - Make 'perf evlist -v' decode perf_event_attr->branch_sample_type (Arnaldo Carvalho de Melo) > > # perf record --call lbr usleep 1 > # perf evlist -v > cycles:ppp: ... sample_type: IP|TID|TIME|CALLCHAIN|PERIOD|BRANCH_STACK, ... > branch_sample_type: USER|CALL_STACK|NO_FLAGS|NO_CYCLES > # > > - Clear dummy entry accumulated period, fixing such 'perf top/report' output > as: (Kan Liang) > > 4769.98% 0.01% 0.00% 0.01% tchain_edit [kernel] [k] update_fast_timekeeper > > - System calls with pid_t arguments gets them augmented with the COMM event > more thoroughly: > > # trace -e perf_event_open perf stat -e cycles -p 15608 > 6.876 ( 0.014 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15608 (hexchat), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 3 > 6.882 ( 0.005 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15639 (gmain), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 4 > 6.889 ( 0.005 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15640 (gdbus), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 5 > ^^^^^^^^^^^^^^^^^^ > ^C > > - Fix offline module name mismatch issue in 'perf probe' (Ravi Bangoria) > > - Fix module probe issue if no dwarf support in (Ravi Bangoria) > > Assorted fixes: > > - Fix off-by-one in write_buildid() (Andrey Ryabinin) > > - Fix segfault when printing callchains in 'perf script' (Chris Phlipot) > > - Replace assignment with comparison on assert check in 'perf test' entry (Colin Ian King) > > - Fix off-by-one comparison in intel-pt code (Colin Ian King) > > - Close target file on error path in 'perf probe' (Masami Hiramatsu) > > - Set default kprobe group name if not given in 'perf probe' (Masami Hiramatsu) > > - Avoid partial perf_event_header reads (Wang Nan) > > Infrastructure: > > - Update x86's syscall_64.tbl copy, adding preadv2 & pwritev2 (Arnaldo Carvalho de Melo) > > - Make the x86 clean quiet wrt syscall table removal (Jiri Olsa) > > Cleanups: > > - Simplify wrapper for LOCK_PI in 'perf bench futex' (Davidlohr Bueso) > > - Remove duplicate const qualifier (Eric Engestrom) > > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> > > ---------------------------------------------------------------- > Andrey Ryabinin (1): > perf buildid: Fix off-by-one in write_buildid() > > Arnaldo Carvalho de Melo (14): > perf trace: Extract evsel contructor from perf_evlist__add_pgfault > perf trace: Make --pf maj/min/all use callchains too > perf trace: Make --event honour --min-stack too > perf trace: Make --pf honour --min-stack too > perf evlist: Decode perf_event_attr->branch_sample_type > perf trace: Move perf_flags beautifier to tools/perf/trace/beauty/ > perf trace: Do not beautify the 'pid' parameter as a simple integer > tools lib api fs: Add helper to read string from procfs file > perf thread: Introduce method to set comm from /proc/pid/self > perf trace: Read thread's COMM from /proc when not set > perf tools: Update x86's syscall_64.tbl, adding preadv2 & pwritev2 > perf bench: Remove one more die() call > perf core: Allow setting up max frame stack depth via sysctl > perf tools: Set the maximum allowed stack from /proc/sys/kernel/perf_event_max_stack > > Chris Phlipot (1): > perf script: Fix segfault when printing callchains > > Colin Ian King (2): > perf tests: Replace assignment with comparison on assert check > perf intel-pt: Fix off-by-one comparison on maximum code > > Davidlohr Bueso (1): > perf bench futex: Simplify wrapper for LOCK_PI > > Eric Engestrom (1): > perf tools: Remove duplicate const qualifier > > Jiri Olsa (2): > perf tools: Make the x86 clean quiet > tools build: Fix perf_clean target > > Kan Liang (1): > perf hists: Clear dummy entry accumulated period > > Masami Hiramatsu (4): > perf probe: Close target file on error path > perf tools: Add lsdir() helper to read a directory > perf probe: Let probe_file__add_event return 0 if succeeded > perf probe: Set default kprobe group name if it is not given > > Ravi Bangoria (2): > perf probe: Fix offline module name missmatch issue > perf probe: Fix module probe issue if no dwarf support > > Wang Nan (1): > perf evlist: Enforce ring buffer reading > > Documentation/sysctl/kernel.txt | 14 ++ > arch/arm/kernel/perf_callchain.c | 2 +- > arch/arm64/kernel/perf_callchain.c | 4 +- > arch/metag/kernel/perf_callchain.c | 2 +- > arch/mips/kernel/perf_event.c | 4 +- > arch/powerpc/perf/callchain.c | 4 +- > arch/sparc/kernel/perf_event.c | 6 +- > arch/x86/events/core.c | 4 +- > arch/xtensa/kernel/perf_event.c | 4 +- > include/linux/perf_event.h | 8 +- > kernel/bpf/stackmap.c | 8 +- > kernel/events/callchain.c | 35 ++++- > kernel/sysctl.c | 12 ++ > tools/Makefile | 3 +- > tools/lib/api/fs/fs.c | 13 ++ > tools/lib/api/fs/fs.h | 2 + > tools/perf/Documentation/perf-report.txt | 2 +- > tools/perf/Documentation/perf-script.txt | 2 +- > tools/perf/Documentation/perf-top.txt | 2 +- > tools/perf/Documentation/perf-trace.txt | 2 +- > tools/perf/arch/x86/Makefile | 2 +- > tools/perf/arch/x86/entry/syscalls/syscall_64.tbl | 2 + > tools/perf/bench/futex-lock-pi.c | 2 +- > tools/perf/bench/futex.h | 6 +- > tools/perf/bench/mem-functions.c | 22 ++- > tools/perf/builtin-report.c | 4 +- > tools/perf/builtin-script.c | 16 +- > tools/perf/builtin-top.c | 4 +- > tools/perf/builtin-trace.c | 174 +++++++++++---------- > tools/perf/perf.c | 5 + > tools/perf/tests/event_update.c | 2 +- > tools/perf/tests/hists_cumulate.c | 2 +- > tools/perf/tests/hists_filter.c | 2 +- > tools/perf/tests/hists_output.c | 2 +- > tools/perf/trace/beauty/perf_event_open.c | 43 +++++ > tools/perf/trace/beauty/pid.c | 5 +- > tools/perf/util/build-id.c | 6 +- > tools/perf/util/evlist.c | 12 +- > tools/perf/util/evsel.c | 18 ++- > tools/perf/util/hist.c | 2 + > .../perf/util/intel-pt-decoder/intel-pt-decoder.c | 2 +- > tools/perf/util/machine.c | 6 +- > tools/perf/util/probe-event.c | 114 +++++++++++--- > tools/perf/util/probe-file.c | 3 +- > .../perf/util/scripting-engines/trace-event-perl.c | 2 +- > tools/perf/util/thread.c | 21 ++- > tools/perf/util/thread.h | 2 + > tools/perf/util/util.c | 36 +++++ > tools/perf/util/util.h | 4 + > 49 files changed, 475 insertions(+), 179 deletions(-) > create mode 100644 tools/perf/trace/beauty/perf_event_open.c Pulled, thanks a lot Arnaldo! Ingo
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