lkml.org 
[lkml]   [2016]   [Apr]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] x86/hpet: Reduce HPET counter read contention
On Thu, Apr 7, 2016 at 8:07 AM, Waiman Long <waiman.long@hpe.com> wrote:
> On 04/07/2016 12:58 AM, Andy Lutomirski wrote:
>> Reading the HPET is so slow that all the atomic ops in the world won't
>> make a dent. Why not just turn this optimization on unconditionally?
>>
>> --Andy
>
>
> I am constantly on the alert that we should not introduce regression on
> lesser systems like a single socket machine with a few cores. That is why I
> put the check to conditionally enable this optimization. I have no issue of
> taking that out and let it be the default as long as no one object.
>

Agreed. I just suspect it's actually faster on all systems.

This reminds me -- I need to send out my patch to disable the vdso
HPET code, which will make your change more effective. I'll cc you.

> Cheers,
> Longman



--
Andy Lutomirski
AMA Capital Management, LLC

\
 
 \ /
  Last update: 2016-04-08 02:41    [W:0.074 / U:0.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site