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perf diff: Add option to sort entries based on diff computation

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Adding support to sort hist entries based on the outcome of selected
computation. It's now possible to specify '+' as a first character of
'-c' option value to make such sort.

Example:

  $ perf diff -c ratio -b
  # Event 'cache-misses'
  #
  #   Baseline           Ratio      Shared Object                            Symbol
  #   ........  ..............  .................  ................................
  #
        19.64%            0.69  [kernel.kallsyms]  [k] clear_page
         0.30%            0.17  [kernel.kallsyms]  [k] mm_alloc
         0.04%            0.20  [kernel.kallsyms]  [k] kmem_cache_alloc

  $ perf diff -c +ratio -b
  # Event 'cache-misses'
  #
  #   Baseline           Ratio      Shared Object                            Symbol
  #   ........  ..............  .................  ................................
  #
        19.64%            0.69  [kernel.kallsyms]  [k] clear_page
         0.04%            0.20  [kernel.kallsyms]  [k] kmem_cache_alloc
         0.30%            0.17  [kernel.kallsyms]  [k] mm_alloc

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/1349448287-18919-4-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2012-10-05 16:44:42 +02:00
committed by Arnaldo Carvalho de Melo
parent 7aaf6b3551
commit 96c47f1984
5 changed files with 167 additions and 18 deletions
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29
tools/perf/ui/hist.c
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@@ -242,24 +242,15 @@ static int hpp__width_delta(struct perf_hpp *hpp __maybe_unused)
static int hpp__entry_delta(struct perf_hpp *hpp, struct hist_entry *he)
{
struct hist_entry *pair = he->pair;
struct hists *pair_hists = pair ? pair->hists : NULL;
struct hists *hists = he->hists;
u64 old_total, new_total;
double old_percent = 0, new_percent = 0;
double diff;
const char *fmt = symbol_conf.field_sep ? "%s" : "%7.7s";
char buf[32] = " ";
double diff;
old_total = pair_hists ? pair_hists->stats.total_period : 0;
if (old_total > 0 && pair)
old_percent = 100.0 * pair->stat.period / old_total;
if (he->diff.computed)
diff = he->diff.period_ratio_delta;
else
diff = perf_diff__compute_delta(he);
new_total = hists->stats.total_period;
if (new_total > 0)
new_percent = 100.0 * he->stat.period / new_total;
diff = new_percent - old_percent;
if (fabs(diff) >= 0.01)
scnprintf(buf, sizeof(buf), "%+4.2F%%", diff);
@@ -280,12 +271,14 @@ static int hpp__width_ratio(struct perf_hpp *hpp __maybe_unused)
static int hpp__entry_ratio(struct perf_hpp *hpp, struct hist_entry *he)
{
struct hist_entry *pair = he->pair;
double new_period = he->stat.period;
double old_period = pair ? pair->stat.period : 0;
double ratio = pair ? new_period / old_period : 0;
const char *fmt = symbol_conf.field_sep ? "%s" : "%14s";
char buf[32] = " ";
double ratio;
if (he->diff.computed)
ratio = he->diff.period_ratio;
else
ratio = perf_diff__compute_ratio(he);
if (ratio > 0.0)
scnprintf(buf, sizeof(buf), "%+14.6F", ratio);