lkml.org 
[lkml]   [2003]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: 2.6.0-test2-mm3 osdl-aim-7 regression
Date
On Thu, 7 Aug 2003 05:10, Cliff White wrote:
> > Binary searching (insert gratuitous rant about benchmarks that take more
> > than two minutes to complete) reveals that the slowdown is due to
> > sched-2.6.0-test2-mm2-A3.

This is most likely the round robinning of tasks every 25ms. The extra
overhead of nanosecond timing I doubt could make that size difference (but I
could be wrong). There is some tweaking of this round robinning in my code
which may help this, but it won't bring it back up to original performance I
believe. Two things to try are add my patches up to O12.3int first to see how
much (if at all!) it helps, and change TIMESLICE_GRANULARITY in sched.c to
(MAX_TIMESLICE) which basically disables it completely. If there is still a
drop in performance with this, the remainder is the extra locking/overhead in
nanosecond timing.

Con

-
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 13:47    [W:0.077 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site