lkml.org 
[lkml]   [2003]   [Apr]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.5.67-mm4
On Fri, Apr 18, 2003 at 01:45:36AM -0700, Andrew Morton wrote:
>
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.67/2.5.67-mm4/
>
> . A bunch of anticipatory scheduler patches.
>
> For the first time ever, AS is working well with both IDE and SCSI
> under all the usual tests.
>
> It works just fine on SCSI with zero TCQ tags, and with four TCQ tags.
> At eight tags, read-vs-write performace is starting to measurably drop off.
> At 32 tags it is about 2000x slower than at zero or four tags.
>
> My recommendation, as always, is to disable SCSI TCQ completely. If you
> really must, set it to four tags.

What about drivers that bypass de SCSI layer?
I administer a server with a Mylex RAID controller (DAC960)...

Regards,
Toon.
-
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 13:34    [W:0.072 / U:2.644 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site