lkml.org 
[lkml]   [2011]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: perf: kernel memory leak when inherit enabled
    On Mon, 14 Mar 2011, Vince Weaver wrote:

    > On Mon, 14 Mar 2011, Arnaldo Carvalho de Melo wrote:
    >
    > > Em Mon, Mar 14, 2011 at 06:27:19PM -0400, Vince Weaver escreveu:
    > > > On Fri, 11 Mar 2011, Vince Weaver wrote:
    > > > >
    > > > > While trying to use perf events with inherit enabled to profile some
    > > > > multi-threaded BLAS routines (using PAPI) I ended up out-of-memorying my
    > > > > machine. It turns out you can quickly leak gigabytes of kernel memory
    > > > > that isn't freed when the process exits.
    > > >
    > > > I've bisected this. There's a whole day I'll never see again. binutils
    > > > 2.21 and gcc-4.5 for the lose :(
    > > >
    > > > Anyway this memory leak with inherit was introduced in
    > > > 4fd38e4595e
    >
    > This changeset was reverted already in
    > e3174cfd2a1e28fff774681f00a0eef3d31da970
    > yet somehow that didn't fix the inherit mem-leak.

    I see, a new fix was made immediately after the revert,
    050735b08ca8a016bbace4445fa025b88fee770b
    which probably immediately re-introduced the problem, which is why
    git bisect didn't catch this. I'm away from my test machine so I'll
    have to wait until tomorrow before I can investigate more.

    Vince
    vweaver1@eecs.utk.edu


    \
     
     \ /
      Last update: 2011-03-15 03:29    [W:0.021 / U:30.924 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site