lkml.org 
[lkml]   [2016]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 0/4] sched,time: fix irq time accounting with nohz_idle
From
Date
On Tue, 2016-07-05 at 16:02 +0300, Nikolay Borisov wrote:
>
> On 06/30/2016 10:35 PM, riel@redhat.com wrote:
> > Currently irq time accounting only works in these cases:
> > 1) purely ticke based accounting
> > 2) nohz_full accounting, but only on housekeeping & nohz_full CPUs
> > 3) architectures with native vtime accounting
> >
> > On nohz_idle CPUs, which are probably the majority nowadays,
> > irq time accounting is currently broken. This leads to systems
> > reporting a dramatically lower amount of irq & softirq time than
> > is actually spent handling them, with all the time spent while the
> > system is in the idle task being accounted as idle.
>
> Is this supposed to alleviate the issue reported here:
> http://www.gossamer-threads.com/lists/linux/kernel/2169180

Indeed, it is.

--

All Rights Reversed.[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2016-07-05 15:41    [W:0.132 / U:1.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site