On Wed, Aug 19, 2015 at 3:11 PM, Andi Kleen <a...@linux.intel.com> wrote:
> On Wed, Aug 19, 2015 at 10:38:26AM +0200, Stephane Eranian wrote:
>> This patch improves perf script by enabling printing of the
>> branch stack via the 'brstack' argument to the field selection
>> option -F. The option is off by default and operates only if the
>> perf.data file has branch stack content.
>
> Thanks that's very useful. I wanted that several times.
>>
>> +static void print_sample_brstack(union perf_event *event __maybe_unused,
>> + struct perf_sample *sample,
>> + struct thread *thread __maybe_unused,
>> + struct perf_event_attr *attr __maybe_unused)
>> +{
>> + struct branch_stack *br = sample->branch_stack;
>> + u64 i;
>> +
>> + if (!(br && br->nr))
>> + return;
>> +
>> + for (i = 0; i < br->nr; i++) {
>> + printf(" 0x%"PRIx64"/0x%"PRIx64" ", br->entries[i].from,
>> br->entries[i].to);
>
> Should print the various flags too. Also tip just added cycles information.
>
Ok, I will add that in v2.
> Also it would be good to resolve the addresses to symbol + offset
But then, that becomes harder to post-process or even read with long
C++ signatures.
> (and perhaps have support for srcline too).
>
>
> -Andi
> --
> a...@linux.intel.com -- Speaking for myself only
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