On Wed, Nov 25, 2009 at 01:14:01PM -0700, Andrew Shewmaker wrote: > 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: > > > 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.
Hi, The 2.6.27 kernel had a lot of new networking code in there. And some of the network performance issues carry forward into the 2.6.28 kernel. I would suggest you go to the 2.6.29 kernel. BTW, centos 5 runs a modified ext3 filesystem. So, that is an issue you'll need to come to terms with in moving to other kernels. FYI, fedora core 12 runs the 2.6.31 kernel. Good luck with it. Karen -- Karen Shaeffer Neuralscape, Palo Alto, Ca. 94306 shaef...@neuralscape.com http://www.neuralscape.com _______________________________________________ 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
