From: Evgeniy Polyakov <zbr@ioremap.net>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>, Chris Friesen <cfriesen@nortel.com>,
Thomas Gleixner <tglx@linutronix.de>,
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 09:55:11 +0400 [thread overview]
Message-ID: <20090513055511.GA8529@ioremap.net> (raw)
In-Reply-To: <1242119578.11251.321.camel@twins>
Hi.
On Tue, May 12, 2009 at 11:12:58AM +0200, Peter Zijlstra (a.p.zijlstra@chello.nl) wrote:
> Wouldn't the even better solution be to get rid of softirqs
> all-together?
And move tasklets into some thread context?
Only if we are ready to fix 7 times rescheduling regressions compared to
kernel threads (work queue actually). At least that's how tasklet
behaved compared to work queue 1.5 years ago in the simplest
and quite naive test where tasklet/work rescheduled iself number of
times:
http://marc.info/?l=linux-crypto-vger&m=119462472517405&w=2
--
Evgeniy Polyakov
WARNING: multiple messages have this Message-ID (diff)
From: Evgeniy Polyakov <zbr@ioremap.net>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: netdev@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
David Miller <davem@davemloft.net>,
linuxppc-dev@ozlabs.org, paulus@samba.org,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: question about softirqs
Date: Wed, 13 May 2009 09:55:11 +0400 [thread overview]
Message-ID: <20090513055511.GA8529@ioremap.net> (raw)
In-Reply-To: <1242119578.11251.321.camel@twins>
Hi.
On Tue, May 12, 2009 at 11:12:58AM +0200, Peter Zijlstra (a.p.zijlstra@chello.nl) wrote:
> Wouldn't the even better solution be to get rid of softirqs
> all-together?
And move tasklets into some thread context?
Only if we are ready to fix 7 times rescheduling regressions compared to
kernel threads (work queue actually). At least that's how tasklet
behaved compared to work queue 1.5 years ago in the simplest
and quite naive test where tasklet/work rescheduled iself number of
times:
http://marc.info/?l=linux-crypto-vger&m=119462472517405&w=2
--
Evgeniy Polyakov
next prev parent reply other threads:[~2009-05-13 5:55 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 [this message]
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
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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