Weird "nice" behavior

Louis LeBlanc FreeBSD at keyslapper.net
Wed Jul 6 19:19:09 GMT 2005


On 07/06/05 02:55 PM, Kris Kennaway sat at the `puter and typed:
> On Wed, Jul 06, 2005 at 02:26:22PM -0400, Lowell Gilbert wrote:
> > "Scott I. Remick" <scott at sremick.net> writes:
> > 
> > > I'm seeing something strange/annoying tonight... maybe someone could help
> > > explain why it's happening.
> > > 
> > > FreeBSD 5.4-RELEASE
> > > <SNIP>
> > 
> > Sounds like you're blocked on I/O, not CPU.  
> > SCSI drives with tagged queueing would probably perform better.
> 
> Also look for Jeff Roberson's patch that addresses this performance
> problem, which was sent (and committed) to -current a month or so ago,
> and which I think I forwarded to -stable.

I haven't noticed this problem myself (and I'm using 5.4 RELEASE),
probably because I'm not using SCSI, but I am curious about the patch
committal.  If I understand right, this patch is not currently
committed to the RELENG_5_4 branch, that not being the same as STABLE
or CURRENT.

Since this is a performance issue that many (like the OP) would
consider serious, is there any chance this patch would make it to
RELENG_5_4?

I ask this purely out of curiosity, not to see whether I (or anyone
else) agrees or disagrees with it. :)

Thanks!
Lou
-- 
Louis LeBlanc                          FreeBSD-at-keyslapper-DOT-net
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