lkml.org 
[lkml]   [2008]   [Aug]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: loaded router, excessive getnstimeofday in oprofile
From
From: Denys Fedoryshchenko <denys@visp.net.lb>
Date: Thu, 28 Aug 2008 19:48:52 +0300

> So there is few good solutions available (IMHO):
> 1)Introduce some SO_REALTIMESTAMP (anyway even SO_TIMESTAMP not defined in any
> standard) for banks and ntp folks, who need them. And even give them timespec
> instead timeval, so they will be even more happy with resolution.
> 2)Provide sysctl,kernel boot, or even "build time" option for "banks" to have
> high resolution(and expensive) SO_TIMESTAMP.

The performance hit hurts, but changing the default to lower
resolution after it having been high resolution for 10+ years
is a regression and something we really can't do.


\
 
 \ /
  Last update: 2008-08-28 21:39    [W:0.101 / U:6.536 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site