lkml.org 
[lkml]   [2010]   [Nov]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [rfc 3/3] perf, x86: P4 PMU -- export ABI part of event config to userspace
From
Date
On Wed, 2010-11-24 at 01:46 +0300, Cyrill Gorcunov wrote:
> plain text document attachment (x86-perf-export-abi)
> Due to tight 64 bit size of event config field (where we have to track
> pretty lot of info during event lifetime) some bits are to be exported
> via header into userspace.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
> CC: Lin Ming <ming.m.lin@intel.com>
> CC: Stephane Eranian <eranian@google.com>
> CC: Peter Zijlstra <peterz@infradead.org>
> ---
>
> Note that I don't like much the idea to export anything into userspace
> but it seems there is no other choise. So there is a minimum which should
> be exported.


Could you say what exactly is exposed to userspace and why?


\
 
 \ /
  Last update: 2010-11-24 09:35    [W:0.082 / U:0.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site