From 2ab046cd01e33a854798a3e245c9e3f32b950a7d Mon Sep 17 00:00:00 2001 From: Jin Yao Date: Fri, 8 Dec 2017 21:13:46 +0800 Subject: perf script: Support time percent and multiple time ranges perf script has a --time option to limit the time range of output. It only supports absolute time. Now this option is extended to support multiple time ranges and support the percent of time. For example: 1. Select the first and second 10% time slices: perf script --time 10%/1,10%/2 2. Select from 0% to 10% and 30% to 40% slices: perf script --time 0%-10%,30%-40% Changelog: v6: Fix the merge issue with latest perf/core branch. No functional changes. v5: Add checking of first/last sample time to detect if it's recorded in perf.data. If it's not recorded, returns error message to user. v4: Remove perf_time__skip_sample, only uses perf_time__ranges_skip_sample v3: Since the definitions of first_sample_time/last_sample_time are moved from perf_session to perf_evlist so change the related code. Signed-off-by: Jin Yao Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Kan Liang Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1512738826-2628-7-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-script.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'tools/perf/Documentation/perf-script.txt') diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 974ceb12c7f3..7b622a812a72 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -329,6 +329,22 @@ include::itrace.txt[] stop time is not given (i.e, time string is 'x.y,') then analysis goes to end of file. + Also support time percent with multipe time range. Time string is + 'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'. The maximum number of slices is 10. + + For example: + Select the second 10% time slice + perf script --time 10%/2 + + Select from 0% to 10% time slice + perf script --time 0%-10% + + Select the first and second 10% time slices + perf script --time 10%/1,10%/2 + + Select from 0% to 10% and 30% to 40% slices + perf script --time 0%-10%,30%-40% + --max-blocks:: Set the maximum number of program blocks to print with brstackasm for each sample. -- cgit v1.2.3