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

From: Ben Greear
Date: Fri Mar 11 2005 - 14:20:25 EST

Christian Schmid wrote:

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 Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at