Re: How to stress test? (and 2.0.x SMP yucks)

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 28 Dec 1998 02:14:48 +0000 (GMT)

Messages sorted by: [ date ][ thread ][ subject ][ author ]
Next message: Aaron Wrasman: "Re: ATI FB driver entry"
Previous message: Bjarni R. Einarsson: "How to stress test? (and 2.0.x SMP yucks)"

> dd if=/dev/urandom bs=1024k count=24 | gzip -c |zcat >/dev/null
>
> locks the machine up reeeal tight for 1-2 seconds, with incredibly delayed
> (or missing) responses from the console itself (just switching VTs could
> take 2-3 seconds). This is actually bad enough to be a primitive denial of
> service attack..

Thats not a 2.0.x SMP bug, its a urandom driver bug. SMP just makes it look
paticularly bad

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

Next message: Aaron Wrasman: "Re: ATI FB driver entry"
Previous message: Bjarni R. Einarsson: "How to stress test? (and 2.0.x SMP yucks)"