lkml.org 
[lkml]   [2010]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH 2/3 v2] perf: Implement Nehalem uncore pmu
From
Date
On Fri, 2010-11-26 at 09:18 +0100, Stephane Eranian wrote:

> In the perf_event model, given that any one of the 4 cores can be used
> to program uncore events, you have no choice but to broadcast to all
> 4 cores. Each has to demultiplex and figure out which of its counters
> have overflowed.

Not really, you can redirect all these events to the first online cpu of
the node.

You can re-write event->cpu in pmu::event_init(), and register cpu
hotplug notifiers to migrate the state around.




\
 
 \ /
  Last update: 2010-11-26 12:27    [W:0.160 / U:0.892 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site