[lkml]   [2012]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] perf tools: fix guest mode monitoring on AMD
On Mon, Feb 27, 2012 at 06:52:25PM +0100, Stephane Eranian wrote:
> Yeah, but that causes simple commands such as "perf stat -e cycles ls"
> to return 0 count.
> So either you get a segfault or you get zero count. There is something
> else going on here...

Hmm, looks like the counters will not do any counting when EFER.SVME==0
and HO==1 or GO==1 is set in the counters :(
A solution would be to mask out these bits in the perf-ctrl register
when EFER.SVME=0

I'll try to come up with a fix soon.


 \ /
  Last update: 2012-02-27 19:25    [W:0.057 / U:13.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site