lkml.org 
[lkml]   [2013]   [Sep]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [GIT PULL] perf fixes
From
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)

Linus


\
 
 \ /
  Last update: 2013-09-12 21:01    [W:1.500 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site