[lkml]   [2008]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] x86: add the debugfs interface for the sysprof tool
    On Sat, 23 Feb 2008 16:54:49 +0200 "Pekka Enberg" <> wrote:

    > On Sat, Feb 23, 2008 at 10:11 AM, Andrew Morton
    > <> wrote:
    > > Seems a poor idea to me. Sure, oprofile is "hard to set up", but not if
    > > your distributor already did it for you.
    > >
    > > Sidebar: the code uses the utterly crappy register_timer_hook() which
    > >
    > > a) is woefully misnamed and
    > >
    > > b) is racy and
    > >
    > > c) will disrupt oprofile if it is being used. And vice versa.
    > I wonder if sysprof should hook to the same interrupt as oprofile then?

    oprofile uses register_timer_hook() for its oh-crap-nothing-else-works
    fallback iirc. It's a useful fallback: I used it a few centuries ago on
    some el-cheapo VIA CPU-based thing we had at Digeo.

    It's unclear to me whether all this stuff works with NO_HZ=y, btw. Didn't
    we just lose the regular timer interrupts which these clients depend upon?

     \ /
      Last update: 2008-02-23 20:05    [W:0.024 / U:29.296 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site