lkml.org 
[lkml]   [2005]   [Jun]   [21]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: -mm -> 2.6.13 merge status (HZ -> 250?)
FromLee Revell <>
DateTue, 21 Jun 2005 12:26:31 -0400
On Mon, 2005-06-20 at 23:54 -0700, Andrew Morton wrote:
> CONFIG_HZ for x86 and ia64: changes default HZ to 250, make HZ
> Kconfigurable.
> 
>     Will merge (will switch default to 1000 Hz later if that seems
> necessary) 

How about delaying this until the high res timers patches are ready?
That way you can save power and avoid the latency regression, in fact it
would be a huge improvement from user POV.

Consider a program with a 5ms RT constraint, like a game or mplayer.
Currently it uses the RTC on 2.4/HZ=100 systems and usleep() on
2.6/HZ=1000.  Allowing HZ to regress to 250 would force us to handle
2.4, 2.6.1 - 2.6.12, and 2.6.13+ separately.  It would be a huge mess.

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: 2005-06-21 16:50    [from the cache]
©2003-2008