Re: BUG: Slowdown on 3000 socket-machines tracked down

Ben Greear
2005-03-11T19:13:40Z

Christian Schmid wrote:
> OHGAWD I GOT IT!!!!!!!!
>
> I admit, totally coincidentially but its really FIXED. Today I went to
> the puter scanning the servers by routine and wondered why the bandwidth
> is at 100% without any holes.
>
> The only thing I have done is I switched off hyper-threading because the
> server is at only 20% CPU anyway so I just disabled it.
>
> So its something with linux dealing with hyper-threading. YAY :)

For what it's worth, I was running dual-xeon systems with HT turned on.

But, I have a single process, single-threaded application, so there is not much
scheduling to be done. If you have a large number of threads or processes,
then it would make more sense for turning off HT to have an affect.

Ben

--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com