On Wed, Sep 14, 2011 at 13:28, Bruno Wolff III <br...@wolff.to> wrote:
> On Wed, Sep 14, 2011 at 13:46:40 -0700, > Adam Williamson <awill...@redhat.com> wrote: > > > > They weren't; see my numbers in the related bug > > (https://bugzilla.redhat.com/show_bug.cgi?id=735268 ). The debug > > overhead appears to have gotten much heavier in 3.1. > > I added myself to that bug, though I wasn't really seeing that much of > a slow down in graphics. (I have an rv280 which might not have the issue > that later radeon cards were having.) My issue seems to be related to > disk I/O. I am not sure if it is heavier cpu use in journalling, raid or > encryption or if the actual I/O is slower. But it seems that I/O heavy > activities such as yum updates and kernel builds are taking several times > longer than they were a few weeks ago (in rawhide). > > I'm using the latest rawhide kernel. During times of heavy I/O the system becomes very unresponsive. The cursor will stop moving long enough to count to between 5 and 10. I know it happens with heavy network I/O so it might be the particular driver in my case. Not sure if the slow-down is true for other types of I/O. This has been true for all of the recent rawhide kernels. darrell
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