On Wed, Nov 25, 2009 at 12:34 PM, Greg Lindahl <lind...@pbm.com> wrote: > On Wed, Nov 25, 2009 at 12:37:01PM +0100, Bogdan Costescu wrote: > >> A much newer kernel from Fedora usually requires newer utils as well > > Yeah, last time I did this I didn't rpm-ize the kernel, and that saved > me quite a bit of work. I snagged the .config file out of Fedora, but > didn't grab any patches. > > Since you guys seem determined to speculate about what feature I need, > it's the new scheduler, CFS, which appeared in 2.6.23.
In case you were considering the 2.6.25 kernel that shipped with Fedora 9, I recommend against it. I know there have been studies showing that it is a nice kernel with regard to low interrupt noise, but I have regularly seen it lock up while running MPI apps. 2.6.27 hasn't had the same issue, but we have seen 10-20% regression in IP network performance. -- Andrew Shewmaker _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
