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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-05-09 20:28:10 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-05-09 21:15:35 -0300
commit232a5c948da5e23dff27e48180abf4a4238f7602 (patch)
treebf17e2e428a77b656946e798e3b099dc09c658be /tools
parent1f626bc36847ac8dd192f055aed0f9678a781313 (diff)
downloadblackbird-op-linux-232a5c948da5e23dff27e48180abf4a4238f7602.tar.gz
blackbird-op-linux-232a5c948da5e23dff27e48180abf4a4238f7602.zip
perf report: Allow limiting the number of entries to print in callchains
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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-report.c5
-rw-r--r--tools/perf/util/callchain.h1
-rw-r--r--tools/perf/util/hist.c10
3 files changed, 15 insertions, 1 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 5e2f47f88ec6..642a6d8eb5dc 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -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");
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 0f4da093cbd8..1cba1f5504e7 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -34,6 +34,7 @@ typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_node *,
struct callchain_param {
enum chain_mode mode;
+ u32 print_limit;
double min_percent;
sort_chain_func_t sort;
};
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index e0c8a722e11f..0f154a530dfd 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -333,6 +333,7 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
u64 remaining;
size_t ret = 0;
int i;
+ uint entries_printed = 0;
if (callchain_param.mode == CHAIN_GRAPH_REL)
new_total = self->children_hit;
@@ -379,6 +380,8 @@ static size_t __callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
new_depth_mask | (1 << depth),
left_margin);
node = next;
+ if (++entries_printed == callchain_param.print_limit)
+ break;
}
if (callchain_param.mode == CHAIN_GRAPH_REL &&
@@ -404,6 +407,7 @@ static size_t callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
bool printed = false;
int i = 0;
int ret = 0;
+ u32 entries_printed = 0;
list_for_each_entry(chain, &self->val, list) {
if (!i++ && sort__first_dimension == SORT_SYM)
@@ -424,6 +428,9 @@ static size_t callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
ret += fprintf(fp, " %s\n", chain->ms.sym->name);
else
ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
+
+ if (++entries_printed == callchain_param.print_limit)
+ break;
}
ret += __callchain__fprintf_graph(fp, self, total_samples, 1, 1, left_margin);
@@ -462,6 +469,7 @@ static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
struct rb_node *rb_node;
struct callchain_node *chain;
size_t ret = 0;
+ u32 entries_printed = 0;
rb_node = rb_first(&self->sorted_chain);
while (rb_node) {
@@ -484,6 +492,8 @@ static size_t hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
break;
}
ret += fprintf(fp, "\n");
+ if (++entries_printed == callchain_param.print_limit)
+ break;
rb_node = rb_next(rb_node);
}
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