[lkml]   [2011]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] sched: reorder root_domain to remove 64 bit alignment padding
On Fri, 2011-07-15 at 12:44 +0200, Peter Zijlstra wrote:
> On Fri, 2011-07-15 at 11:41 +0100, Richard Kennedy wrote:
> > Reorder root_domain to remove 8 bytes of alignment padding on 64 bit
> > builds, this shrinks the size from 1736 to 1728 bytes, therefore using
> > one fewer cachelines.
> depends a bit on how insane struct cpupri is, but yeah, good compaction.
> Thanks!

Thanks Peter,

argh -- I hadn't spotted that cpupri used NR_CPUS and was so variable in
size. I guess there won't be much benefit then, as the distros seem to
always set NR_CPUS to some insanely huge value ;)


 \ /
  Last update: 2011-07-15 13:25    [from the cache]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site