From 05484298cbfebbf8c8c55b000541a245bc286bec Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Thu, 24 Jan 2013 16:10:29 +0100 Subject: perf tools: Add support for weight v7 (modified) perf record has a new option -W that enables weightened sampling. Add sorting support in top/report for the average weight per sample and the total weight sum. This allows to both compare relative cost per event and the total cost over the measurement period. Add the necessary glue to perf report, record and the library. v2: Merge with new hist refactoring. v3: Fix manpage. Remove value check. Rename global_weight to weight and weight to local_weight. v4: Readd sort keys to manpage v5: Move weight to end v6: Move weight to template v7: Rename weight key. Original patch from Andi modified by Stephane Eranian to include ONLY the weight supporting code and apply to pristine 3.8.0-rc4. Signed-off-by: Andi Kleen Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1359040242-8269-6-git-send-email-eranian@google.com [ committer note: changed to cope with fc5871ed and the hists_link perf test entry ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-record.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tools/perf/Documentation/perf-record.txt') diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 938e8904f64d..d4da111ef53d 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -182,6 +182,12 @@ is enabled for all the sampling events. The sampled branch type is the same for The various filters must be specified as a comma separated list: --branch-filter any_ret,u,k Note that this feature may not be available on all processors. +-W:: +--weight:: +Enable weightened sampling. An additional weight is recorded per sample and can be +displayed with the weight and local_weight sort keys. This currently works for TSX +abort events and some memory events in precise mode on modern Intel CPUs. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] -- cgit v1.2.3