question about softirqs

Peter Zijlstra a.p.zijlstra at chello.nl
Tue May 12 19:32:41 EST 2009


On Tue, 2009-05-12 at 11:23 +0200, Ingo Molnar wrote:
> 
> Yeah, that would be "nice". A single IRQ thread plus the process 
> context(s) doing networking might perform well.
> 
> Multiple IRQ threads (softirq and hardirq threads mixed) i'm not so 
> sure about - it's extra context-switching cost.

Sure, that was implied by the getting rid of softirqs ;-), on -rt we
currently suffer this hardirq/softirq thread ping-pong, it sucks.




More information about the Linuxppc-dev mailing list