From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>
Cc: linuxppc-dev@ozlabs.org, netdev@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
paulus@samba.org, Thomas Gleixner <tglx@linutronix.de>,
David Miller <davem@davemloft.net>
Subject: Re: question about softirqs
Date: Tue, 12 May 2009 11:32:41 +0200 [thread overview]
Message-ID: <1242120761.11251.324.camel@twins> (raw)
In-Reply-To: <20090512092348.GA29796@elte.hu>
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.
next prev parent reply other threads:[~2009-05-12 9:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <18948.63755.279732.294842@cargo.ozlabs.ibm.com>
[not found] ` <20090508.234815.127227651.davem@davemloft.net>
[not found] ` <4A086DB2.8040703@nortel.com>
[not found] ` <20090511.162436.193717082.davem@davemloft.net>
2009-05-12 0:43 ` question about softirqs Chris Friesen
2009-05-12 8:12 ` Ingo Molnar
2009-05-12 9:12 ` Peter Zijlstra
2009-05-12 9:23 ` Ingo Molnar
2009-05-12 9:32 ` Peter Zijlstra [this message]
2009-05-12 12:20 ` Steven Rostedt
2009-05-13 4:45 ` David Miller
2009-05-13 4:44 ` David Miller
2009-05-13 5:15 ` Paul Mackerras
2009-05-13 5:28 ` David Miller
2009-05-13 5:55 ` Evgeniy Polyakov
2009-05-12 15:18 ` Chris Friesen
2009-05-13 8:34 ` Andi Kleen
2009-05-13 13:23 ` Chris Friesen
2009-05-13 14:15 ` Andi Kleen
2009-05-13 14:17 ` Thomas Gleixner
2009-05-13 14:24 ` Andi Kleen
2009-05-13 14:54 ` Eric Dumazet
2009-05-13 15:02 ` Andi Kleen
2009-05-13 15:05 ` Chris Friesen
2009-05-13 15:54 ` Thomas Gleixner
2009-05-13 16:10 ` Chris Friesen
2009-05-13 17:01 ` Andi Kleen
2009-05-13 19:04 ` Chris Friesen
2009-05-13 19:13 ` Andi Kleen
2009-05-13 19:44 ` Chris Friesen
2009-05-13 19:53 ` Andi Kleen
2009-05-13 20:55 ` Thomas Gleixner
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