lkml.org 
[lkml]   [2017]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [RFC PATCH v2 0/7] x86/idle: add halt poll support
Date
Yang Zhang <yang.zhang.wz@gmail.com> writes:

> Some latency-intensive workload will see obviously performance
> drop when running inside VM. The main reason is that the overhead
> is amplified when running inside VM. The most cost i have seen is
> inside idle path.

You could test with https://lkml.org/lkml/2017/7/9/204
which optimizes these idle paths with a fast path.

If that works it would be a far better solution than
explicit tunables and basically giving up by polling.

-Andi

\
 
 \ /
  Last update: 2017-08-29 15:03    [W:1.878 / U:0.484 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site