From: Arjan van de Ven <arjanv@redhat.com>
To: Alex Bligh - linux-kernel <linux-kernel@alex.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Lse-tech] [RFC] [PATCH] Scalable Statistics Counters
Date: Fri, 7 Dec 2001 16:16:59 -0500 [thread overview]
Message-ID: <20011207161659.A22935@devserv.devel.redhat.com> (raw)
In-Reply-To: <3C0F6D99.8CF24014@redhat.com> <951177670.1007759364@[195.224.237.69]>
In-Reply-To: <951177670.1007759364@[195.224.237.69]>; from linux-kernel@alex.org.uk on Fri, Dec 07, 2001 at 09:09:25PM -0000
yOn Fri, Dec 07, 2001 at 09:09:25PM -0000, Alex Bligh - linux-kernel wrote:
>
>
> --On Thursday, 06 December, 2001 1:07 PM +0000 Arjan van de Ven
> <arjanv@redhat.com> wrote:
>
> > Would you care to point out a statistic in the kernel that is
> > incremented
> > more than 10.000 times/second ? (I'm giving you a a factor of 100 of
> > playroom
> > here) [One that isn't per-cpu yet of course]
>
> cat /proc/net/dev
>
> 80,000 increments a second here on at least 4 counters
except that
1) you can (and should) bind nics to cpus
and
2) the cacheline for nic stats should (for good drivers) be in the cacheline
the ISR gets into the cpu ANYWAY to get to the device data -> no extra
cacheline pingpong
next prev parent reply other threads:[~2001-12-07 21:17 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-05 15:02 [Lse-tech] [RFC] [PATCH] Scalable Statistics Counters Niels Christiansen
2001-12-06 12:33 ` Ravikiran G Thirumalai
2001-12-06 12:59 ` Keith Owens
2001-12-06 13:07 ` [Lse-tech] " Arjan van de Ven
2001-12-06 14:09 ` Ravikiran G Thirumalai
2001-12-06 14:10 ` Arjan van de Ven
2001-12-06 19:35 ` Dipankar Sarma
2001-12-07 21:09 ` Alex Bligh - linux-kernel
2001-12-07 21:16 ` Arjan van de Ven [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-12-06 16:10 Niels Christiansen
2001-12-07 8:54 ` Dipankar Sarma
2001-12-08 22:24 ` Paul Jackson
2001-12-09 3:46 ` Jack Steiner
2001-12-09 4:44 ` Paul Jackson
2001-12-09 17:34 ` Jack Steiner
2001-12-11 23:27 ` Paul Jackson
2001-12-07 11:39 ` Ravikiran G Thirumalai
2001-12-08 13:46 ` Anton Blanchard
2001-12-07 9:52 Niels Christiansen
2001-12-07 10:10 ` Dipankar Sarma
2001-12-08 17:43 Niels Christiansen
2001-12-09 11:46 ` Anton Blanchard
2001-12-09 10:57 Manfred Spraul
2001-12-10 16:32 ` Jack Steiner
2001-12-10 17:00 ` Manfred Spraul
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