lkml.org 
[lkml]   [2012]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: sched: Avoid SMT siblings in select_idle_sibling() if possible
From
Date
On Mon, 2012-03-26 at 20:06 +0200, Peter Zijlstra wrote:

> The biggest regression came from tbench, wasn't that mostly a random
> number generator anyway?

That's dbench ;-) Tbench does wiggle around more than you'd like
though. I've never tracked, but in lots of running the thing, 2-3% you
can forget chasing, and I once bisected a 5% regression to an unrelated
change, reverted and re-applied the suspect a few times in disbelief,
and it tracked. You can't trust it _too_ much. I consider it a
reliable indicator that I'd better do more testing. If others agree,
it's a real regression, if not, it's those damn Elves 'n Gremlins ;-)

-Mike




\
 
 \ /
  Last update: 2012-03-27 15:59    [from the cache]
©2003-2011 Jasper Spaans