lkml.org 
[lkml]   [2004]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] Work around for periodic do_gettimeofday hang
From
Date
On Thu, 2004-11-25 at 09:20 +0100, Arjan van de Ven wrote:
> HZ=1000 costs you 1% HPC performance, and for slower machines probably more. Also some hw (with slow smm) really doesn't likeit.

I actually profiled the timer ISR on a 600Mhz C3. It runs for 22 usec.
So with HZ=1000 the residency of the timer interrupt is 2.2%.

Lee

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:08    [W:0.047 / U:0.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site