From: ebiederm@xmission.com (Eric W. Biederman)
To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: "David S. Miller" <davem@redhat.com>,
hadi@cyberus.ca, tcw@tempest.prismnet.com,
linux-kernel@vger.kernel.org, netdev@oss.sgi.com,
Nivedita Singhvi <niv@us.ibm.com>
Subject: Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000
Date: 11 Sep 2002 03:11:49 -0600 [thread overview]
Message-ID: <m1hegwoppm.fsf@frodo.biederman.org> (raw)
In-Reply-To: <18563262.1031269721@[10.10.2.3]>
"Martin J. Bligh" <Martin.Bligh@us.ibm.com> writes:
> > Ie. the headers that don't need to go across the bus are the critical
> > resource saved by TSO.
>
> I'm not sure that's entirely true in this case - the Netfinity
> 8500R is slightly unusual in that it has 3 or 4 PCI buses, and
> there's 4 - 8 gigabit ethernet cards in this beast spread around
> different buses (Troy - are we still just using 4? ... and what's
> the raw bandwidth of data we're pushing? ... it's not huge).
>
> I think we're CPU limited (there's no idle time on this machine),
> which is odd for an 8 CPU 900MHz P3 Xeon,
Quite possibly. The P3 has roughly an 800MB/s FSB bandwidth, that must
be used for both I/O and memory accesses. So just driving a gige card at
wire speed takes a considerable portion of the cpus capacity.
On analyzing this kind of thing I usually find it quite helpful to
compute what the hardware can theoretically to get a feel where the
bottlenecks should be.
Eric
next prev parent reply other threads:[~2002-09-11 9:21 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-05 18:30 Early SPECWeb99 results on 2.5.33 with TSO on e1000 Troy Wilson
2002-09-05 20:59 ` jamal
2002-09-05 22:11 ` Troy Wilson
2002-09-05 22:39 ` Nivedita Singhvi
2002-09-05 23:01 ` Dave Hansen
2002-09-05 22:48 ` Nivedita Singhvi
2002-09-06 1:47 ` jamal
2002-09-06 3:38 ` Nivedita Singhvi
2002-09-06 3:58 ` David S. Miller
2002-09-06 4:20 ` Nivedita Singhvi
2002-09-06 4:17 ` David S. Miller
2002-09-07 0:05 ` Troy Wilson
2002-09-06 3:56 ` David S. Miller
2002-09-06 3:47 ` David S. Miller
2002-09-06 6:48 ` Martin J. Bligh
2002-09-06 6:51 ` David S. Miller
2002-09-06 7:36 ` Andrew Morton
2002-09-06 7:22 ` David S. Miller
2002-09-06 9:54 ` jamal
2002-09-06 14:29 ` Martin J. Bligh
2002-09-06 15:38 ` Dave Hansen
2002-09-06 16:11 ` Martin J. Bligh
2002-09-06 16:21 ` Nivedita Singhvi
2002-09-06 15:29 ` Dave Hansen
2002-09-06 16:29 ` Martin J. Bligh
2002-09-06 17:36 ` Dave Hansen
2002-09-06 18:26 ` Andi Kleen
2002-09-06 18:31 ` John Levon
2002-09-06 18:33 ` Dave Hansen
2002-09-06 18:36 ` David S. Miller
2002-09-06 18:45 ` Martin J. Bligh
2002-09-06 18:43 ` David S. Miller
2002-09-06 19:19 ` Nivedita Singhvi
2002-09-06 19:21 ` David S. Miller
2002-09-06 19:45 ` Nivedita Singhvi
2002-09-06 19:26 ` Andi Kleen
2002-09-06 19:24 ` David S. Miller
2002-09-06 19:45 ` Martin J. Bligh
2002-09-06 17:26 ` Gerrit Huizenga
2002-09-06 17:37 ` David S. Miller
2002-09-06 18:19 ` Gerrit Huizenga
2002-09-06 18:26 ` Martin J. Bligh
2002-09-06 18:36 ` David S. Miller
2002-09-06 18:51 ` Martin J. Bligh
2002-09-06 18:48 ` David S. Miller
2002-09-06 19:05 ` Gerrit Huizenga
2002-09-06 19:01 ` David S. Miller
2002-09-06 20:29 ` Alan Cox
2002-09-06 18:34 ` David S. Miller
2002-09-06 18:57 ` Gerrit Huizenga
2002-09-06 18:58 ` David S. Miller
2002-09-06 19:52 ` Gerrit Huizenga
2002-09-06 19:49 ` David S. Miller
2002-09-06 20:03 ` Gerrit Huizenga
2002-09-06 23:48 ` Troy Wilson
2002-09-11 9:11 ` Eric W. Biederman [this message]
2002-09-11 14:10 ` Martin J. Bligh
2002-09-11 15:06 ` Eric W. Biederman
2002-09-11 15:15 ` David S. Miller
2002-09-11 15:31 ` Eric W. Biederman
2002-09-11 15:27 ` Martin J. Bligh
2002-09-12 7:28 ` Todd Underwood
2002-09-12 12:30 ` jamal
2002-09-12 13:57 ` Todd Underwood
2002-09-12 14:11 ` Alan Cox
2002-09-12 14:41 ` todd-lkml
2002-09-12 23:12 ` David S. Miller
2002-09-13 21:59 ` todd-lkml
2002-09-13 22:04 ` David S. Miller
2002-09-15 20:16 ` jamal
2002-09-16 4:23 ` David S. Miller
2002-09-16 14:16 ` todd-lkml
2002-09-16 19:52 ` David S. Miller
2002-09-16 21:32 ` todd-lkml
2002-09-16 21:29 ` David S. Miller
2002-09-16 22:53 ` David Woodhouse
2002-09-16 22:46 ` David S. Miller
2002-09-16 23:03 ` David Woodhouse
2002-09-16 23:08 ` Jeff Garzik
2002-09-16 23:02 ` David S. Miller
2002-09-16 23:48 ` Jeff Garzik
2002-09-16 23:43 ` David S. Miller
2002-09-17 0:01 ` Jeff Garzik
2002-09-17 10:31 ` jamal
2002-09-13 22:12 ` Nivedita Singhvi
2002-09-12 17:18 ` Nivedita Singhvi
2002-09-06 23:56 ` Troy Wilson
2002-09-06 23:52 ` David S. Miller
2002-09-07 0:18 ` Nivedita Singhvi
2002-09-07 0:27 ` Troy Wilson
-- strict thread matches above, loose matches on Subject: below --
2002-09-05 20:47 Feldman, Scott
2002-09-06 11:44 Robert Olsson
2002-09-06 14:37 ` Martin J. Bligh
2002-09-06 15:38 ` Robert Olsson
2002-09-06 18:35 Manfred Spraul
2002-09-06 18:38 ` David S. Miller
2002-09-06 19:40 ` Manfred Spraul
2002-09-06 19:34 ` David S. Miller
2002-09-10 12:02 ` Robert Olsson
2002-09-10 16:55 ` Manfred Spraul
2002-09-11 7:46 ` Robert Olsson
2002-09-10 14:59 Mala Anand
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