diff options
author | Jiri Olsa <jolsa@redhat.com> | 2012-10-05 16:44:41 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-10-05 14:06:54 -0300 |
commit | 7aaf6b35512382329c5b2dd46b42f2bf12a5fff0 (patch) | |
tree | a0523500216e2224547bfe4c3e49630826fcbcf0 /tools/perf/builtin-diff.c | |
parent | a06d143e7cfaa10626f3ad0127a9b9169f900add (diff) | |
download | linux-7aaf6b35512382329c5b2dd46b42f2bf12a5fff0.tar.gz linux-7aaf6b35512382329c5b2dd46b42f2bf12a5fff0.tar.bz2 linux-7aaf6b35512382329c5b2dd46b42f2bf12a5fff0.zip |
perf diff: Add ratio computation way to compare hist entries
Adding -c option to select computation method with the current 'Delta'
computation as default. Current possible values are of this option are:
'delta' and 'ratio'.
Adding 'ratio' as new computation way to compare hist entries. If
specified the 'Ratio' column is displayed with value 'r' computed as:
r = A->period / B->period
with:
- A/B being matching hist entry from first/second file specified
(or perf.data/perf.data.old) respectively.
- period being the hist entry period value
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1349448287-18919-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-diff.c')
-rw-r--r-- | tools/perf/builtin-diff.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 1063c31e507c..e90c06aea4d4 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -26,6 +26,41 @@ static bool force; static bool show_displacement; static bool show_baseline_only; +enum { + COMPUTE_DELTA, + COMPUTE_RATIO, + COMPUTE_MAX, +}; + +const char *compute_names[COMPUTE_MAX] = { + [COMPUTE_DELTA] = "delta", + [COMPUTE_RATIO] = "ratio", +}; + +static int compute; + +static int setup_compute(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + int *cp = (int *) opt->value; + unsigned i; + + if (!str) { + *cp = COMPUTE_DELTA; + return 0; + } + + for (i = 0; i < COMPUTE_MAX; i++) + if (!strcmp(str, compute_names[i])) { + *cp = i; + return 0; + } + + pr_err("Failed: '%s' is not computation method " + "(use 'delta' or 'ratio').\n", str); + return -EINVAL; +} + static int hists__add_entry(struct hists *self, struct addr_location *al, u64 period) { @@ -262,6 +297,9 @@ static const struct option options[] = { "Show position displacement relative to baseline"), OPT_BOOLEAN('b', "baseline-only", &show_baseline_only, "Show only items with match in baseline"), + OPT_CALLBACK('c', "compute", &compute, "delta,ratio (default delta)", + "Entries differential computation selection", + setup_compute), OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), @@ -290,9 +328,19 @@ static void ui_init(void) /* No overhead column. */ perf_hpp__column_enable(PERF_HPP__OVERHEAD, false); - /* Display baseline/delta/displacement columns. */ + /* Display baseline/delta/ratio/displacement columns. */ perf_hpp__column_enable(PERF_HPP__BASELINE, true); - perf_hpp__column_enable(PERF_HPP__DELTA, true); + + switch (compute) { + case COMPUTE_DELTA: + perf_hpp__column_enable(PERF_HPP__DELTA, true); + break; + case COMPUTE_RATIO: + perf_hpp__column_enable(PERF_HPP__RATIO, true); + break; + default: + BUG_ON(1); + }; if (show_displacement) perf_hpp__column_enable(PERF_HPP__DISPL, true); |