lkml.org 
[lkml]   [2003]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.0-test2-mm3 osdl-aim-7 regression
Con Kolivas wrote:

>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.
>
>
What is the need for this round robining? Don't processes get a calculated
timeslice anyway?


-
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:0.061 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site