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Message-ID: <20120906173139.GA15756@krava.brq.redhat.com> Date: Thu, 6 Sep 2012 19:31:39 +0200 From: Jiri Olsa <jolsa@...hat.com> To: linux-kernel@...r.kernel.org Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>, Corey Ashford <cjashfor@...ux.vnet.ibm.com>, Frederic Weisbecker <fweisbec@...il.com>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Andi Kleen <andi@...stfloor.org>, David Ahern <dsahern@...il.com>, Namhyung Kim <namhyung@...nel.org> Subject: Re: [RFC 00/12] perf diff: Factor diff command forgot to mention git repo: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/linux.git perf/diff8 branch jirka On Thu, Sep 06, 2012 at 05:46:54PM +0200, Jiri Olsa wrote: > hi, > this patchset factors the perf diff command to be usable for > differential profiling following paper from Paul McKenney: > (thanks to Arnaldo for sharing it with me). > > http://www2.rdrop.com/users/paulmck/scalability/paper/profiling.2002.06.04.pdf > > The 'perf diff' and 'std/hist' code is now changed to allow computations > mentioned in the paper. Two of them are implemented within this patchset: > 1) ratio differential profiling > 2) weighted differential profiling > > The standard ratio delta computation stays as default. > > To sum it up: > - perf diff displays output for matching event pairs within 2 given perf.data files > - stdio ui code is factored to allow easy insertion of new data column > - added perf diff '-b' option to display only matched hist entries > (hist entries found in both files) > - added perf diff '-c' option to choose diff computation, > support for: > delta: the current default one > ratio: ratio differential profile > wdiff: weighted differential profile > - added perf diff '-c+' option to sort entries based on the computation data > - added perf diff '-F' option to show formula used to compute the data > - added perf diff '-p' option to display hist entries periods > > > Attached patches: > 01/12 perf diff: Make diff command work with evsel hists > 02/12 perf tools: Replace sort's standalone field_sep with symbol_conf.field_sep > 03/12 perf hists: Add struct hists pointer to struct hist_entry > 04/12 perf diff: Refactor diff displacement possition info > 05/12 perf diff: Refactor stdio ui data columns output > 06/12 perf diff: Add -b option for perf diff to display paired entries only > 07/12 perf diff: Add ratio computation way to compare hist entries > 08/12 perf diff: Add option to sort entries based on diff computation > 09/12 perf diff: Add weighted diff computation way to compare hist entries > 10/12 perf diff: Add -p option to display period values for hist entries > 11/12 perf diff: Add -F option to display formula for computation > 12/12 perf diff: Add -F option for ratio computation > > > I'm still testing this, trying to find out useful outputs/computations/options, > so looking for any ideas and recommendations ;) > > thanks, > jirka > > > Eamples: > > display default profile > ----------------------------------------------------------------------------------- > $ ./perf diff > # Event 'cache-misses:u' > # > # Baseline Delta Shared Object Symbol > # ........ ........ .................. ................................. > # > 0.00% +63.54% libc-2.15.so [.] __dcigettext > 0.00% +5.38% libc-2.15.so [.] _dl_addr > 0.00% +5.30% libc-2.15.so [.] __register_atfork > 0.31% +3.94% [kernel.kallsyms] [k] page_fault > 0.00% +4.07% ld-2.15.so [.] check_match.11335 > 0.00% +3.65% ld-2.15.so [.] version_check_doit > 0.00% +3.56% ld-2.15.so [.] _dl_fixup > 0.00% +3.05% ld-2.15.so [.] _dl_map_object > 0.00% +2.90% [kernel.kallsyms] [k] system_call > 3.94% -1.53% [kernel.kallsyms] [k] device_not_available > 0.00% +1.21% libc-2.15.so [.] __GI___libc_write > 0.00% +0.54% libc-2.15.so [.] __memcpy_ssse3_back > 0.00% +0.11% libc-2.15.so [.] execvp > 7.71% -7.69% ld-2.15.so [.] _dl_start > 0.03% -0.02% libpthread-2.15.so [.] __read_nocancel > 0.20% -0.18% perf [.] perf_evlist__prepare_workload > > > > display ratio profile > ----------------------------------------------------------------------------------- > $ ./perf diff -cratio > # Event 'cache-misses:u' > # > # Baseline Ratio Shared Object Symbol > # ........ .............. .................. ................................. > # > 0.00% 0.000 libc-2.15.so [.] __dcigettext > 0.00% 0.000 libc-2.15.so [.] _dl_addr > 0.00% 0.000 libc-2.15.so [.] __register_atfork > 0.31% 15.450 [kernel.kallsyms] [k] page_fault > 0.00% 0.000 ld-2.15.so [.] check_match.11335 > 0.00% 0.000 ld-2.15.so [.] version_check_doit > 0.00% 0.000 ld-2.15.so [.] _dl_fixup > 0.00% 0.000 ld-2.15.so [.] _dl_map_object > 0.00% 0.000 [kernel.kallsyms] [k] system_call > 3.94% 0.678 [kernel.kallsyms] [k] device_not_available > 0.00% 0.000 libc-2.15.so [.] __GI___libc_write > 0.00% 0.000 libc-2.15.so [.] __memcpy_ssse3_back > 0.00% 0.000 libc-2.15.so [.] execvp > 7.71% 0.002 ld-2.15.so [.] _dl_start > 0.03% 0.500 libpthread-2.15.so [.] __read_nocancel > 0.20% 0.077 perf [.] perf_evlist__prepare_workload > > > > display ratio profile only with entries matched in both files > ----------------------------------------------------------------------------------- > $ ./perf diff -cratio -b > > # Event 'cache-misses:u' > # > # Baseline Ratio Shared Object Symbol > # ........ .............. .................. ................................. > # > 0.31% 15.450 [kernel.kallsyms] [k] page_fault > 3.94% 0.678 [kernel.kallsyms] [k] device_not_available > 7.71% 0.002 ld-2.15.so [.] _dl_start > 0.03% 0.500 libpthread-2.15.so [.] __read_nocancel > 0.20% 0.077 perf [.] perf_evlist__prepare_workload > > > > display ratio profile only with entries matched in both files and sorted > ----------------------------------------------------------------------------------- > $ ./perf diff -c+ratio -b > > # Event 'cache-misses:u' > # > # Baseline Ratio Shared Object Symbol > # ........ .............. .................. ................................. > # > 0.31% 15.450 [kernel.kallsyms] [k] page_fault > 3.94% 0.678 [kernel.kallsyms] [k] device_not_available > 0.03% 0.500 libpthread-2.15.so [.] __read_nocancel > 0.20% 0.077 perf [.] perf_evlist__prepare_workload > 7.71% 0.002 ld-2.15.so [.] _dl_start > > > > display weighted profile with weights w1=1 w2=2, with formula, sorted, matching > entries only and with periods displayed > ----------------------------------------------------------------------------------- > $ ./perf diff -c+wdiff:1,2 -F -b -p > > # Baseline Weighted diff Formula Baseline Period Period Shared Object Symbol > # ........ ............. .................................................. ............... ............ .................. ................................. > # > 0.31% +598 (309 * 2) - (20 * 1) 20 309 [kernel.kallsyms] [k] page_fault > 3.94% +92 (175 * 2) - (258 * 1) 258 175 [kernel.kallsyms] [k] device_not_available > 0.03% +0 (1 * 2) - (2 * 1) 2 1 libpthread-2.15.so [.] __read_nocancel > 0.20% -11 (1 * 2) - (13 * 1) 13 1 perf [.] perf_evlist__prepare_workload > 7.71% -503 (1 * 2) - (505 * 1) 505 1 ld-2.15.so [.] _dl_start > > > Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net> > Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl> > Cc: Ingo Molnar <mingo@...e.hu> > Cc: Paul Mackerras <paulus@...ba.org> > Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com> > Cc: Frederic Weisbecker <fweisbec@...il.com> > Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com> > Cc: Andi Kleen <andi@...stfloor.org> > Cc: David Ahern <dsahern@...il.com> > Cc: Namhyung Kim <namhyung@...nel.org> > > --- > tools/perf/Documentation/perf-diff.txt | 63 ++++++++++ > tools/perf/builtin-diff.c | 488 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------ > tools/perf/builtin-report.c | 6 +- > tools/perf/builtin-top.c | 6 +- > tools/perf/ui/stdio/hist.c | 574 ++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------------- > tools/perf/ui/stdio/hist.h | 26 ++++ > tools/perf/util/evsel.h | 7 ++ > tools/perf/util/hist.c | 7 +- > tools/perf/util/hist.h | 24 +++- > tools/perf/util/session.h | 4 +- > tools/perf/util/sort.c | 6 +- > tools/perf/util/sort.h | 22 +++- > 12 files changed, 957 insertions(+), 276 deletions(-) -- 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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