Messages in this thread | | | Date | Thu, 25 Jun 2015 21:09:58 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH V6 08/17] perf tools: Add Intel PT support |
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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.hunter@intel.com> Date: Fri May 29 16:33:39 2015 +0300
perf tools: Add Intel BTS support
- Arnaldo
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