lkml.org 
[lkml]   [2019]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 0/2] genirq, proc: Speedup /proc/stat interrupt statistics
On Wed, 30 Jan 2019, Andrew Morton wrote:
> On Wed, 30 Jan 2019 13:31:30 +0100 Thomas Gleixner <tglx@linutronix.de> wrote:
>
> > Waiman reported that on large systems with a large amount of interrupts the
> > readout of /proc/stat takes a long time to sum up the interrupt
> > statistics. In principle this is not a problem. but for unknown reasons
> > some enterprise quality software reads /proc/stat with a high frequency.
> >
> > The reason for this is that interrupt statistics are accounted per cpu. So
> > the /proc/stat logic has to sum up the interrupt stats for each interrupt.
> >
> > The following series addresses this by making the interrupt statitics code
> > in the core generate the sum directly and by making the loop in the
> > /proc/stat read function smarter.
> >
>
> Has the speedup been quantified?

Waiman should be able to provide numbers


\
 
 \ /
  Last update: 2019-01-31 00:06    [W:0.104 / U:1.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site