lkml.org 
[lkml]   [2013]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning
On Wed, Jan 09, 2013 at 06:20:35PM +0530, Raghavendra K T wrote:
> I ran kernbench on 32 core (mx3850) machine with 3.8-rc2 base.
> x base_3.8rc2
> + rik_backoff
> N Min Max Median Avg Stddev
> x 8 222.977 231.16 227.735 227.388 3.1512986
> + 8 218.75 232.347 229.1035 228.25425 4.2730225
> No difference proven at 95.0% confidence

I got similar results on smaller systems (1 socket, dual-cores and quad-cores)
when running Rik's latest series, no big difference for good nor for worse,
but I also think Rik's work is meant to address bigger systems with more cores
contending for any given spinlock.




\
 
 \ /
  Last update: 2013-01-10 04:21    [W:0.183 / U:0.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site