Re: HT bug in some Intel CPUs ?

[Greg Oster <oster%cs.usask.ca@localhost>]

Manuel Bouyer writes:
> On Thu, Aug 06, 2009 at 09:40:22AM -0600, Greg Oster wrote:
> > I'll see if I can schedule a quick downtime and turn off 
> > hyperthreading...
> 
> that would be good; as the box is also SMP it'd be even better
> to make sure HT is a problem.
> 
> 
> > But yes, it's the "may be other issues" I'm mostly 
> > concerned about :-}
> 
> Some have reported issues with processes stuck in tstile.

I've seen that on this box... hence my concern that just turning off 
hyperthreading won't necessarily help...

> I've never seen it myself, neither on ftp.fr.netbsd.org
> nor ftp.lip6.fr which is a mirror for several major linux distros, and
> gets an average of 10 http requests/s and quite important ftp traffic
> too. Both hosts are SMP. ftp.fr has an athlon x2, ftp.lip6.fr
> has 2 3.4Ghz Xeon, but with HT turned off (I can't remember if
> I turned it off on purpose, or if I just forgot to turn it on).
> Both have been stable for the last 3 months (exept power failures).
> 
> -- 
> Manuel Bouyer <bouyer%antioche.eu.org@localhost>
>      NetBSD: 26 ans d'experience feront toujours la difference
> --

Later...

Greg Oster