lkml.org 
[lkml]   [2003]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: kernbench-16 on 2.5.59 vs 2.5.59-mm6
On Mon, Jan 27, 2003 at 06:40:15PM +0100, Martin J. Bligh wrote:
> Going from 59 to 59-mm6, I get:
>
> Kernbench-16:
> Elapsed User System CPU
> 2.5.59 47.45 568.02 143.17 1498.17
> 2.5.59-mm6 47.18 567.15 138.62 1495.50
>
> Summary: Scheduler stuff seems like a wash (schedule -> do_schedule).
> Seems to be some sort of rearrangement of the dcache stuff which
> appears to be mildly beneficial (what's going in there?).
>
> diffprofile (+ gets worse, - gets better).
>
> 2023 do_schedule
> 485 dentry_open
> 289 .text.lock.file_table

Looks like you are getting hit by contention on files_lock. I have
been messing around with some code to split up the files_lock, but
I can't seem to get the locking in the tty layer right.

Hmm.. .text.lock.namei is probably dcache_lock. -mms no longer has
dcache_rcu, so not quite sure what helped you here.


Thanks
Dipankar
-
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 13:32    [W:0.019 / U:1.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site