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perf auxtrace: Add option to synthesize branch stacks on samples

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Add AUX area tracing option 'l' to synthesize branch stacks on samples
just like sample type PERF_SAMPLE_BRANCH_STACK.  This is taken into use
by Intel PT in a subsequent patch.

Based-on-patch-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-9-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 16:15:39 +03:00
committed by Arnaldo Carvalho de Melo
parent 35ca01c117
commit 601897b54c
3 changed files with 28 additions and 0 deletions
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4
tools/perf/util/auxtrace.h
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@@ -63,7 +63,9 @@ enum itrace_period_type {
* @calls: limit branch samples to calls (can be combined with @returns)
* @returns: limit branch samples to returns (can be combined with @calls)
* @callchain: add callchain to 'instructions' events
* @last_branch: add branch context to 'instruction' events
* @callchain_sz: maximum callchain size
* @last_branch_sz: branch context size
* @period: 'instructions' events period
* @period_type: 'instructions' events period type
*/
@@ -79,7 +81,9 @@ struct itrace_synth_opts {
bool calls;
bool returns;
bool callchain;
bool last_branch;
unsigned int callchain_sz;
unsigned int last_branch_sz;
unsigned long long period;
enum itrace_period_type period_type;
};