[lkml]   [2010]   [Dec]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC PATCH 0/3] directed yield for Pause Loop Exiting
On 12/11/2010 08:57 AM, Balbir Singh wrote:

> If the vpcu holding the lock runs more and capped, the timeslice
> transfer is a heuristic that will not help.

That indicates you really need the cap to be per guest, and
not per VCPU.

Having one VCPU spin on a lock (and achieve nothing), because
the other one cannot give up the lock due to hitting its CPU
cap could lead to showstoppingly bad performance.

All rights reversed

 \ /
  Last update: 2010-12-13 18:05    [W:0.086 / U:1.244 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site