From: Namhyung Kim <namhy...@kernel.org> The diff.compute config variable is to set the default compute method of perf diff command (-c option). Possible values 'delta' (default), 'delta-abs', 'ratio' and 'wdiff'.
Signed-off-by: Namhyung Kim <namhy...@kernel.org> Cc: Jiri Olsa <jo...@kernel.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Taeung Song <treeze.tae...@gmail.com> Link: http://lkml.kernel.org/r/20170210073614.24584-4-namhy...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/Documentation/perf-config.txt | 5 +++++ tools/perf/Documentation/perf-diff.txt | 5 +++-- tools/perf/builtin-diff.c | 16 +++++++++++++++- 3 files changed, 23 insertions(+), 3 deletions(-) diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index 49ab79d662fa..5b4fff3adc4b 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -505,6 +505,11 @@ diff.*:: Setting it to 1 will sort the result by delta (or other compute method selected). + diff.compute:: + This options sets the method for computing the diff result. + Possible values are 'delta', 'delta-abs', 'ratio' and + 'wdiff'. Default is 'delta'. + SEE ALSO -------- linkperf:perf[1] diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index 7c014c9934bb..7391299defef 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -86,8 +86,9 @@ OPTIONS -c:: --compute:: - Differential computation selection - delta,ratio,wdiff,delta-abs (default is delta). - See COMPARISON METHODS section for more info. + Differential computation selection - delta, ratio, wdiff, delta-abs + (default is delta). Default can be changed using diff.compute + config option. See COMPARISON METHODS section for more info. -p:: --period:: diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 181ff996e039..e68cc76bdc5a 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -86,7 +86,7 @@ const char *compute_names[COMPUTE_MAX] = { [COMPUTE_WEIGHTED_DIFF] = "wdiff", }; -static int compute; +static int compute = COMPUTE_DELTA; static int compute_2_hpp[COMPUTE_MAX] = { [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA, @@ -1299,6 +1299,20 @@ static int diff__config(const char *var, const char *value, sort_compute = perf_config_int(var, value); return 0; } + if (!strcmp(var, "diff.compute")) { + if (!strcmp(value, "delta")) { + compute = COMPUTE_DELTA; + } else if (!strcmp(value, "delta-abs")) { + compute = COMPUTE_DELTA_ABS; + } else if (!strcmp(value, "ratio")) { + compute = COMPUTE_RATIO; + } else if (!strcmp(value, "wdiff")) { + compute = COMPUTE_WEIGHTED_DIFF; + } else { + pr_err("Invalid compute method: %s\n", value); + return -1; + } + } return 0; } -- 2.9.3
