Messages in this thread | | | Date | Thu, 12 Sep 2013 22:33:58 +0200 | From | Ingo Molnar <> | Subject | Re: [GIT PULL] perf fixes |
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* Linus Torvalds <torvalds@linux-foundation.org> wrote:
> On Thu, Sep 12, 2013 at 11:10 AM, Linus Torvalds > <torvalds@linux-foundation.org> wrote: > > > > But at least the "make install" problem is repeatable, though. > > And now this new problem is repeatable too: > > # On a fully built kernel tree > perf record -g -e cycles:pp make -j > > results in > > [ perf record: Woken up 27 times to write data ] > [ perf record: Captured and wrote 7.980 MB perf.data (~348659 samples) ] > 0x1b4e0 [0]: failed to process type: -1970637019 > > where that number changes randomly, ie I get > > 0x28dc58 [0]: failed to process type: 99257493 > 0x4100 [0]: failed to process type: -1144359783 > 0x29050 [0]: failed to process type: -972156963 > .. > > looks like perhaps some uninitialized variable somewhere? > > Recording performance profiles of other (simpler?) loads still seems to > work. So it's something about that "make -j" that makes it crap out > (note that the tree is fully built, so not a lot actually gets *done*, > and the thing only takes a few seconds)
Hm, just to make sure, are you running a (very fresh) kernel that has this fix included:
d008d5258e9c perf: Fix up MMAP2 buffer space reservation
?
Thanks,
Ingo
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