From: Andi Kleen <andi@firstfloor.org>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Thomas Gleixner <tglx@linutronix.de>,
Chris Friesen <cfriesen@nortel.com>, Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Steven Rostedt <rostedt@goodmis.org>,
David Miller <davem@davemloft.net>,
linuxppc-dev@ozlabs.org, paulus@samba.org,
netdev@vger.kernel.org
Subject: Re: question about softirqs
Date: Wed, 13 May 2009 17:02:42 +0200 [thread overview]
Message-ID: <20090513150242.GX19296@one.firstfloor.org> (raw)
In-Reply-To: <4A0ADF34.2040001@cosmosbay.com>
> I have one machine SMP flooded by network frames, CPU0 handling all
Yes that's the case softirqd is supposed to handle. When you
spend a significant part of your CPU time in softirq context it kicks
in to provide somewhat fair additional CPU time.
But most systems (like mine) don't do that.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
linuxppc-dev@ozlabs.org, netdev@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
David Miller <davem@davemloft.net>,
Andi Kleen <andi@firstfloor.org>,
paulus@samba.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: question about softirqs
Date: Wed, 13 May 2009 17:02:42 +0200 [thread overview]
Message-ID: <20090513150242.GX19296@one.firstfloor.org> (raw)
In-Reply-To: <4A0ADF34.2040001@cosmosbay.com>
> I have one machine SMP flooded by network frames, CPU0 handling all
Yes that's the case softirqd is supposed to handle. When you
spend a significant part of your CPU time in softirq context it kicks
in to provide somewhat fair additional CPU time.
But most systems (like mine) don't do that.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-05-13 14:57 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 22:51 question about softirqs Chris Friesen
2009-05-08 23:05 ` David Miller
2009-05-08 23:34 ` Paul Mackerras
2009-05-08 23:53 ` David Miller
2009-05-09 2:52 ` Benjamin Herrenschmidt
2009-05-09 3:31 ` Paul Mackerras
2009-05-09 6:48 ` David Miller
2009-05-11 18:25 ` Chris Friesen
2009-05-11 23:24 ` David Miller
2009-05-12 0:43 ` Chris Friesen
2009-05-12 8:12 ` Ingo Molnar
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
2009-05-12 12:20 ` Steven Rostedt
2009-05-12 12:20 ` Steven Rostedt
2009-05-13 4:45 ` David Miller
2009-05-13 4:44 ` David Miller
2009-05-13 4:44 ` David Miller
2009-05-13 5:15 ` Paul Mackerras
2009-05-13 5:15 ` Paul Mackerras
2009-05-13 5:28 ` David Miller
2009-05-13 5:28 ` David Miller
2009-05-13 5:55 ` Evgeniy Polyakov
2009-05-13 5:55 ` Evgeniy Polyakov
2009-05-12 15:18 ` Chris Friesen
2009-05-12 15:18 ` Chris Friesen
2009-05-13 8:34 ` Andi Kleen
2009-05-13 8:34 ` Andi Kleen
2009-05-13 13:23 ` Chris Friesen
2009-05-13 14:15 ` Andi Kleen
2009-05-13 14:15 ` Andi Kleen
2009-05-13 14:17 ` Thomas Gleixner
2009-05-13 14:17 ` Thomas Gleixner
2009-05-13 14:24 ` Andi Kleen
2009-05-13 14:24 ` Andi Kleen
2009-05-13 14:54 ` Eric Dumazet
2009-05-13 14:54 ` Eric Dumazet
2009-05-13 15:02 ` Andi Kleen [this message]
2009-05-13 15:02 ` Andi Kleen
2009-05-13 15:05 ` Chris Friesen
2009-05-13 15:54 ` Thomas Gleixner
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 19:04 ` Chris Friesen
2009-05-13 19:13 ` Andi Kleen
2009-05-13 19:13 ` Andi Kleen
2009-05-13 19:44 ` Chris Friesen
2009-05-13 19:53 ` Andi Kleen
2009-05-13 19:53 ` Andi Kleen
2009-05-13 20:55 ` Thomas Gleixner
2009-05-13 20:55 ` Thomas Gleixner
2009-05-11 23:34 ` Paul Mackerras
2009-05-09 0:28 ` Chris Friesen
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