On Fri, Oct 28, 2005 at 08:57:44AM +0200, David Jander wrote: > > Hi all, > > Many people have said it before: 2.6 has a performance penalty specially for > embdedded systems. > But now that I have 2.6 running on our 100MHz MPC852T based board, I was > shocked to see the result: > The most simple task doing nothing but a closed loop of integer math runs at > _half_ the speed compared to kernel 2.4.25!!!!!
David, Do you have CONFIG_PIN_TLB enabled? If you do, please patch this in: http://www.kernel.org/git/?p=linux/kernel/git/marcelo/8xx-fixes;a=commitdiff;h=a41ba028534c45280170c05c23609ea84f34b38a And select DEBUG_PIN_TLBIE.
