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perf report: Add callchain value option

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Now -g/--call-graph option supports how to display callchain values.
Possible values are 'percent', 'period' and 'count'.  The percent is
same as before and it's the default behavior.  The period displays the
raw period value rather than the percentage.  The count displays the
number of occurrences.

  $ perf report --no-children --stdio -g percent
  ...
    39.93%  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--28.63%-- start_secondary
               |
                --11.30%-- rest_init

  $ perf report --no-children --show-total-period --stdio -g period
  ...
    39.93%   13018705  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--9334403-- start_secondary
               |
                --3684302-- rest_init

  $ perf report --no-children --show-nr-samples --stdio -g count
  ...
    39.93%     80  swapper  [kernel.vmlinux]  [k] intel_idel
            |
            ---intel_idle
               cpuidle_enter_state
               cpuidle_enter
               call_cpuidle
               cpu_startup_entry
               |
               |--57-- start_secondary
               |
                --23-- rest_init

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1447047946-1691-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2015-11-09 14:45:41 +09:00
committed by Arnaldo Carvalho de Melo
parent 5e47f8ff40
commit f2af008695
6 changed files with 84 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
tools/perf/util/callchain.c
View File

@@ -83,6 +83,23 @@ static int parse_callchain_sort_key(const char *value)
return -1;
}
static int parse_callchain_value(const char *value)
{
if (!strncmp(value, "percent", strlen(value))) {
callchain_param.value = CCVAL_PERCENT;
return 0;
}
if (!strncmp(value, "period", strlen(value))) {
callchain_param.value = CCVAL_PERIOD;
return 0;
}
if (!strncmp(value, "count", strlen(value))) {
callchain_param.value = CCVAL_COUNT;
return 0;
}
return -1;
}
static int
__parse_callchain_report_opt(const char *arg, bool allow_record_opt)
{
@@ -106,7 +123,8 @@ __parse_callchain_report_opt(const char *arg, bool allow_record_opt)
if (!parse_callchain_mode(tok) ||
!parse_callchain_order(tok) ||
!parse_callchain_sort_key(tok)) {
!parse_callchain_sort_key(tok) ||
!parse_callchain_value(tok)) {
/* parsing ok - move on to the next */
try_stack_size = false;
goto next;
@@ -820,13 +838,27 @@ char *callchain_node__scnprintf_value(struct callchain_node *node,
{
double percent = 0.0;
u64 period = callchain_cumul_hits(node);
unsigned count = callchain_cumul_counts(node);
if (callchain_param.mode == CHAIN_FOLDED)
if (callchain_param.mode == CHAIN_FOLDED) {
period = node->hit;
if (total)
percent = period * 100.0 / total;
count = node->count;
}
scnprintf(bf, bfsize, "%.2f%%", percent);
switch (callchain_param.value) {
case CCVAL_PERIOD:
scnprintf(bf, bfsize, "%"PRIu64, period);
break;
case CCVAL_COUNT:
scnprintf(bf, bfsize, "%u", count);
break;
case CCVAL_PERCENT:
default:
if (total)
percent = period * 100.0 / total;
scnprintf(bf, bfsize, "%.2f%%", percent);
break;
}
return bf;
}
@@ -835,13 +867,25 @@ int callchain_node__fprintf_value(struct callchain_node *node,
{
double percent = 0.0;
u64 period = callchain_cumul_hits(node);
unsigned count = callchain_cumul_counts(node);
if (callchain_param.mode == CHAIN_FOLDED)
if (callchain_param.mode == CHAIN_FOLDED) {
period = node->hit;
if (total)
percent = period * 100.0 / total;
count = node->count;
}
return percent_color_fprintf(fp, "%.2f%%", percent);
switch (callchain_param.value) {
case CCVAL_PERIOD:
return fprintf(fp, "%"PRIu64, period);
case CCVAL_COUNT:
return fprintf(fp, "%u", count);
case CCVAL_PERCENT:
default:
if (total)
percent = period * 100.0 / total;
return percent_color_fprintf(fp, "%.2f%%", percent);
}
return 0;
}
static void free_callchain_node(struct callchain_node *node)