Em Thu, Jun 25, 2015 at 08:56:34PM -0300, Arnaldo Carvalho de Melo escreveu:
> Will do the same tests with intel_pt as well, on a remote machine, add
> examples
> to the changeset logs and everything going well, aim for pushing for Ingo
> soon,
So, I asked for callchains, with:
perf record -g -e intel_bts// ls
And it got stuck somewhere, then I did a perf top to see where it was,
and got to:
96.24% perf [.] intel_bts_process_queue
Annotating I get to:
1.17 │1a0:┌─→mov 0x8(%r13),%rdx
│ │ test %rdx,%rdx
98.83 │ └──je 1a0
Which is an endless loop! Source code for intel_bts_process_buffer(),
inlined there:
while (sz > sizeof(struct branch)) {
if (!branch->from && !branch->to)
continue;
err = intel_bts_synth_branch_sample(btsq, branch);
if (err)
break;
branch += 1;
sz -= sizeof(struct branch);
}
Can you fix this, please, so that I can fold it into where it was
introduced, namely:
commit 439ad895a2aecea09416206f023336297cc72efe
Author: Adrian Hunter <adrian.hun...@intel.com>
Date: Fri May 29 16:33:39 2015 +0300
perf tools: Add Intel BTS support
- Arnaldo
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