Messages in this thread | | | Date | Wed, 4 Sep 2013 10:53:47 -0700 | Subject | Re: [GIT PULL] perf changes for v3.12 | From | Linus Torvalds <> |
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On Tue, Sep 3, 2013 at 6:29 AM, Ingo Molnar <mingo@kernel.org> wrote: > > Please pull the latest perf-core-for-linus git tree from:
I don't think this is new at all, but I just tried to do a perf record/report of "make -j64 test" on git:
It's a big perf.data file (1.6G), but after it has done the "processing time ordered events" thing it results in:
┌─Warning:───────────────────────────────────┐ │Processed 8672030 events and lost 71 chunks!│ │Check IO/CPU overload! │ │ │ │ │ │Press any key... │ └────────────────────────────────────────────┘
and then it just hangs using 100% CPU time. Pressing any key doesn't do anything.
It may well still be *doing* something, and maybe it will come back some day with results. But it sure doesn't show any indication that it will.
Try this (in a current git source tree: note, by "git" I actually mean git itself, not some random git repository)::
perf record -g -e cycles:pp make -j64 test >& out perf report
maybe you can reproduce it.
Linus
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