Messages in this thread | | | Date | Tue, 5 Mar 2019 13:34:23 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH v4 0/3] perf diff: Add new filter options |
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On Tue, Mar 05, 2019 at 09:05:40PM +0800, Jin Yao wrote: > 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
Acked-by: Jiri Olsa <jolsa@kernel.org>
thanks, jirka
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