lkml.org 
[lkml]   [2014]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 09/11] perf/x86/intel: Implement LRU monitoring ID allocation for CQM
On Wed, Sep 24, 2014 at 03:04:13PM +0100, Matt Fleming wrote:
> From: Matt Fleming <matt.fleming@intel.com>
>
> It's possible to run into issues with re-using unused monitoring IDs
> because there may be stale cachelines associated with that ID from a
> previous allocation. This can cause the LLC occupancy values to be
> inaccurate.
>
> To attempt to mitigate this problem we place the IDs on a least recently
> used list, essentially a FIFO. The basic idea is that the longer the
> time period between ID re-use the lower the probability that stale
> cachelines exist in the cache.

Do we want to provide a user configurable minumum guaranteed queue time?


\
 
 \ /
  Last update: 2014-10-08 12:21    [W:0.377 / U:0.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site