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perf report: Allow limiting the number of entries to print in callchains

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Works by adding a third parameter to the '-g' argument, after the graph
type and minimum percentage, for example:

[root@doppio linux-2.6-tip]# perf report -g fractal,0.5,2

Will show only the first two symbols where at least 0.5% of the samples
took place.

All the other symbols that don't fall outside these constraints will be
put together in the last entry, prefixed with "[...]" and the total
percentage for them.

Suggested-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2010-05-09 20:28:10 -03:00
parent 1f626bc368
commit 232a5c948d
3 changed files with 15 additions and 1 deletions
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5
tools/perf/builtin-report.c
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@@ -343,7 +343,7 @@ static int
parse_callchain_opt(const struct option *opt __used, const char *arg,
int unset)
{
char *tok;
char *tok, *tok2;
char *endptr;
/*
@@ -388,10 +388,13 @@ parse_callchain_opt(const struct option *opt __used, const char *arg,
if (!tok)
goto setup;
tok2 = strtok(NULL, ",");
callchain_param.min_percent = strtod(tok, &endptr);
if (tok == endptr)
return -1;
if (tok2)
callchain_param.print_limit = strtod(tok2, &endptr);
setup:
if (register_callchain_param(&callchain_param) < 0) {
fprintf(stderr, "Can't register callchain params\n");