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perf hists: Allow for max_stack greater than PERF_MAX_STACK_DEPTH

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Use the max_stack value instead of PERF_MAX_STACK_DEPTH so that
arbitrary-sized callchains can be supported.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-17-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-09-25 16:15:47 +03:00 committed by Arnaldo Carvalho de Melo
parent 188bb5e2ce
commit 96b40f3c05
2 changed files with 5 additions and 2 deletions
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6
tools/perf/util/hist.c
View File

@ -695,7 +695,7 @@ iter_finish_normal_entry(struct hist_entry_iter *iter,
}
static int
iter_prepare_cumulative_entry(struct hist_entry_iter *iter __maybe_unused,
iter_prepare_cumulative_entry(struct hist_entry_iter *iter,
struct addr_location *al __maybe_unused)
{
struct hist_entry **he_cache;
@ -707,7 +707,7 @@ iter_prepare_cumulative_entry(struct hist_entry_iter *iter __maybe_unused,
* cumulated only one time to prevent entries more than 100%
* overhead.
*/
he_cache = malloc(sizeof(*he_cache) * (PERF_MAX_STACK_DEPTH + 1));
he_cache = malloc(sizeof(*he_cache) * (iter->max_stack + 1));
if (he_cache == NULL)
return -ENOMEM;
@ -868,6 +868,8 @@ int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
if (err)
return err;
iter->max_stack = max_stack_depth;
err = iter->ops->prepare_entry(iter, al);
if (err)
goto out;

1
tools/perf/util/hist.h
View File

@ -90,6 +90,7 @@ struct hist_entry_iter {
int curr;
bool hide_unresolved;
int max_stack;
struct perf_evsel *evsel;
struct perf_sample *sample;