From: "Jakob Østergaard" <jakob@unthought.net>
To: Tony.P.Lee@nokia.com
Cc: alan@lxorguk.ukuu.org.uk, lmb@suse.de, woody@co.intel.com,
linux-kernel@vger.kernel.org, zaitcev@redhat.com
Subject: Re: InfiniBand BOF @ LSM - topics of interest
Date: Wed, 15 May 2002 01:25:00 +0200 [thread overview]
Message-ID: <20020515012500.D1444@unthought.net> (raw)
In-Reply-To: <4D7B558499107545BB45044C63822DDE3A206D@mvebe001.NOE.Nokia.com>
On Tue, May 14, 2002 at 01:19:13PM -0700, Tony.P.Lee@nokia.com wrote:
...
>
> I like to see user application such as VNC, SAMBA build directly
> on top of IB API. I have couple of IB cards that can
> send 10k 32KBytes message (320MB of data) every ~1 second over
> 1x link with only <7% CPU usage (single CPU xeon 700MHz).
> I was very impressed.
>
> Go thru the socket layer API would just slow thing down.
Not going thru the socket layer will slow you down even more. It will require
you to re-write every single performance-requiring application every time some
bloke designs a new network interconnect with a new API.
I'd take a 5% performance loss over re-writing all my code any day.
But why would it be any slower going over the socket API ? After all, quite a
lot of people have put quite a lot of effort into making that API perform very
well.
>
> With IB bandwidth faster than standard 32/33MHZ PCI, one might
> run DOOM over VNC over IB on remote computer faster
> than a normal PC running DOOM locally....
But not until you port DOOM to the API-of-the-day. Sweet idea though ;)
>
> One might create a OS that miror the complete process state
> info (replicate all the modified page) everytime that
> process is schedule out.
Latency kills.
Adding tracks to the highway doesn't make it any shorter.
--
................................................................
: jakob@unthought.net : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob Østergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
next prev parent reply other threads:[~2002-05-14 23:25 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-14 20:19 InfiniBand BOF @ LSM - topics of interest Tony.P.Lee
2002-05-14 20:42 ` Pete Zaitcev
2002-05-14 23:25 ` Jakob Østergaard [this message]
2002-05-14 23:58 ` Alan Cox
2002-05-15 15:45 ` Timothy D. Witham
-- strict thread matches above, loose matches on Subject: below --
2002-05-16 23:42 Woodruff, Robert J
2002-05-16 10:37 Eric Brunner-Williams in Portland Maine
2002-05-15 23:58 Woodruff, Robert J
2002-05-16 0:32 ` Alan Cox
2002-05-15 20:47 Tony.P.Lee
2002-05-15 21:36 ` Russell Leighton
2002-05-15 22:41 ` Lars Marowsky-Bree
2002-05-16 4:51 ` Ashok Raj
2002-05-15 20:37 Woodruff, Robert J
2002-05-15 20:55 ` Pete Zaitcev
2002-05-15 21:01 ` Alan Cox
2002-05-15 1:29 Tony.P.Lee
2002-05-15 2:35 ` Alan Cox
2002-05-15 5:01 ` Pete Zaitcev
2002-05-15 11:29 ` Alan Cox
2002-05-15 14:27 ` Ashok Raj
2002-05-15 16:34 ` Stephen Hemminger
2002-05-14 22:15 Woodruff, Robert J
2002-05-15 2:42 ` Timothy D. Witham
2002-05-13 16:25 Woodruff, Robert J
2002-05-13 16:36 ` Pete Zaitcev
2002-05-14 20:09 ` Timothy D. Witham
2002-05-14 20:23 ` Pete Zaitcev
2002-05-14 20:33 ` Timothy D. Witham
2002-05-14 21:01 ` Timothy D. Witham
2002-05-13 23:42 ` Alan Cox
2002-05-13 23:26 ` Lars Marowsky-Bree
2002-05-14 0:19 ` Alan Cox
2002-05-14 0:19 ` Joel Becker
2002-05-15 0:11 ` Eric Brunner-Williams in Portland Maine
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