lkml.org 
[lkml]   [2012]   [Oct]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 1/2] perf tools: add event modifier to request exclusive PMU access
On Mon, Oct 22, 2012 at 03:20:51PM +0200, Stephane Eranian wrote:
> This patch adds the x modifier for events. It allows users to
> request exclusive PMU access (attr->exclusive):
>
> perf stat -e cycles:x ......
> or
> perf stat -e cpu/cycles/x ....
>
> Exclusive mode is a feature of perf_events which was not yet
> supported by the perf tool. Some events may require exclusive
> PMU access (like on Intel SandyBridge).

You probably should add it also to be readable from sysfs

(like I did with precise in my haswell patchkit)

Then the SNB version of instructions-p can just force this
without the user having to do anything special.

-Andi


\
 
 \ /
  Last update: 2012-10-22 16:21    [W:0.084 / U:0.180 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site