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Date: Tue, 5 Mar 2019 21:05:40 +0800 From: Jin Yao <yao.jin@...ux.intel.com> To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com, alexander.shishkin@...ux.intel.com Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com, Jin Yao <yao.jin@...ux.intel.com> Subject: [PATCH v4 0/3] perf diff: Add new filter options This patch series creates following new filter options for perf diff. --time: It supports time percent with multipe time ranges. Time string is 'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'. For example: Select the second 10% time slice to diff: perf diff --time 10%/2 Select from 0% to 10% time slice to diff: perf diff --time 0%-10% Select the first and the second 10% time slices to diff: perf diff --time 10%/1,10%/2 Select from 0% to 10% and 30% to 40% slices to diff: perf diff --time 0%-10%,30%-40% It also supports to analyze samples within given time window as: <start>,<stop>. Times have the format seconds.microseconds. If start is not given (i.e., time string is ',x.y') then analysis starts at the beginning of the file. If stop time is not given (i.e, time string is 'x.y,') then analysis goes to end of file. Time string is 'a1.b1,c1.d1:a2.b2,c2.d2'. Use ':' to separate timestamps for different perf.data files. For example, we get the timestamp information from perf script. perf script -i perf.data.old mgen 13940 [000] 3946.361400: ... perf script -i perf.data mgen 13940 [000] 3971.150589 ... perf diff --time 3946.361400,:3971.150589, It analyzes the perf.data.old from the timestamp 3946.361400 to the end of perf.data.old and analyzes the perf.data from the timestamp 3971.150589 to the end of perf.data. --cpu: Only diff samples for the list of CPUs provided. Multiple CPUs can be provided as a comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default is to report samples on all CPUs. For example: perf diff --cpu 0,1 It only diff the samples for CPU0 and CPU1. --pid: Only diff samples for given process ID (comma separated list). --tid: Only diff samples for given thread ID (comma separated list). For example, perf diff --tid 13965 It only diff the samples for thread 13965. v4: --- Update abstime_str_dup(), let it return error if strdup is failed, and update __cmd_diff() accordingly. Only the patch "perf diff: Support --time filter option" is impacted Others are no logical changes. Jin Yao (3): perf diff: Support --time filter option perf diff: Support --cpu filter option perf diff: Support --pid/--tid filter options tools/perf/Documentation/perf-diff.txt | 52 ++++++++++ tools/perf/builtin-diff.c | 168 ++++++++++++++++++++++++++++++--- 2 files changed, 206 insertions(+), 14 deletions(-) -- 2.7.4
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