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perf diff: Add ratio computation way to compare hist entries

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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>
This commit is contained in:
Jiri Olsa 2012-10-05 16:44:41 +02:00 • committed by Arnaldo Carvalho de Melo
parent a06d143e7c
commit 7aaf6b3551
4 changed files with 112 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

52
tools/perf/builtin-diff.c
View file

@ -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);