lkml.org 
[lkml]   [2012]   [May]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 07/41] cpuset: Set up interface for nohz flag
From
Date
On Wed, 2012-05-09 at 09:22 -0500, Christoph Lameter wrote: 
> On Wed, 9 May 2012, Mike Galbraith wrote:

> > > isolcpus are not part of load balancer domains.
> >
> > Yup, so if you have an application with an RT component, somewhat
> > sensitive, needs isolation from rest of a big box, but app also has
> > SCHED_OTHER components. isolcpus is a pain, everything has to be static
> > and nailed to the floor. Load just works when plugged into a cpuset.
>
> Well you have low latency requirements. If you code for lowest latency
> then you have to consider cache sizes, cache sharing etc etc. This means
> you will have to nail down everything anyways. Cpusets would just be
> another thing that one has to worry about.
>
> The loads definitely wont work right if just "plugged into a cpuset".

You're talking about serious RT/HPC. I'm talking about apps/loads with
modest requirements, like "Please keep that evil nVidia (this that the
other) thing the _hell_ away from me, I cannot deal with it's futzing
around in the kernel for a _full second_ at a time".

-Mike



\
 
 \ /
  Last update: 2012-05-09 17:41    [W:0.186 / U:0.988 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site