From: Evgeniy Polyakov <s0mbre@tservice•net.ru>
To: Jrn Engel <joern@wohnheim•fh-wedel.de>
Cc: davem@davemloft•net, netdev@vger•kernel.org
Subject: Re: Netchannles: first stage has been completed. Further ideas.
Date: Thu, 20 Jul 2006 11:42:30 +0400 [thread overview]
Message-ID: <20060720074230.GA21258@tservice.net.ru> (raw)
In-Reply-To: <20060719110035.GA10081@wohnheim.fh-wedel.de>
Hello.
[ Sorry for long delay, there are some problems with mail servers, so I
can not access them remotely, so I create mail by hads, hopefully thread
will not be broken. ]
>> > Your description makes it sound as if you would take a huge leap,
>> > changing all in-kernel code _and_ the userspace interface in a
>> > single
>> > patch. Am I wrong? Or am I right and would it make sense to
>> > extract
>> > small incremental steps from your patch similar to those Van did in
>> > his non-published work?
>>
>> My first implementation used existing kernel code and showed small
>> performance win - there was binding of the socket to netchannel and
>> all
>> protocol processing was moved into process context.
>Iirc, Van didn't show performance numbers but rather cpu utilization
>numbers. And those went down significantly without changing the
>userspace interface.
At least lca presentation graphs shows exactly different numbers -
performance without CPU utilization (but not as his tables).
>Did you look at cpu utilization as well? If you did and your numbers
>are worse than Vans, he either did something smarter than you or
>forged his numbers (quite unlikely).
Interesting sentence from political correcteness point of view :)
I did both CPU and speed measurements when used socket code [1],
and both of them showed small gain, but I only tested 1gbit setup, so
they can not be compared with Van's.
But even with 1gb I was not satisfied with them, so I started different
implementation, which I described in my e-mail to Alexey.
1. speed/cpu measurements of one of the netchannels implementation which
used socket code.
http://thread.gmane.org/gmane.linux.network/36609/focus=36614
--
Evgeniy Polyakov
next prev parent reply other threads:[~2006-07-20 7:42 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-18 8:16 Netchannles: first stage has been completed. Further ideas Evgeniy Polyakov
2006-07-18 8:34 ` David Miller
2006-07-18 8:50 ` Evgeniy Polyakov
2006-07-18 11:16 ` Christian Borntraeger
2006-07-18 11:51 ` Evgeniy Polyakov
2006-07-18 12:36 ` Christian Borntraeger
2006-07-18 19:11 ` Evgeniy Polyakov
2006-07-18 21:20 ` David Miller
2006-07-18 12:15 ` Jörn Engel
2006-07-18 19:08 ` Evgeniy Polyakov
2006-07-19 11:00 ` Jörn Engel
2006-07-20 7:42 ` Evgeniy Polyakov [this message]
2006-07-18 23:01 ` Alexey Kuznetsov
2006-07-19 0:39 ` David Miller
2006-07-19 5:38 ` Evgeniy Polyakov
2006-07-19 6:30 ` Evgeniy Polyakov
2006-07-19 13:19 ` Alexey Kuznetsov
2006-07-20 7:32 ` Evgeniy Polyakov
2006-07-20 16:41 ` Alexey Kuznetsov
2006-07-20 21:08 ` Evgeniy Polyakov
2006-07-20 21:21 ` Ben Greear
2006-07-21 7:19 ` Evgeniy Polyakov
2006-07-21 7:20 ` Evgeniy Polyakov
2006-07-21 16:14 ` Ben Greear
2006-07-21 16:27 ` Evgeniy Polyakov
2006-07-22 13:23 ` Caitlin Bestler
2006-07-20 21:40 ` Ian McDonald
2006-07-21 7:26 ` Evgeniy Polyakov
2006-07-20 22:59 ` Alexey Kuznetsov
2006-07-21 4:55 ` David Miller
2006-07-21 7:10 ` Evgeniy Polyakov
2006-07-21 7:47 ` David Miller
2006-07-21 9:06 ` Evgeniy Polyakov
2006-07-21 9:19 ` David Miller
2006-07-21 9:39 ` Evgeniy Polyakov
2006-07-21 9:46 ` David Miller
2006-07-21 9:55 ` Evgeniy Polyakov
2006-07-21 16:26 ` Rick Jones
2006-07-21 20:57 ` David Miller
2006-07-19 19:52 ` Stephen Hemminger
2006-07-19 20:01 ` David Miller
2006-07-19 20:16 ` Stephen Hemminger
2006-07-24 18:54 ` Stephen Hemminger
2006-07-24 20:52 ` Alexey Kuznetsov
2006-07-27 2:17 ` Rusty Russell
2006-07-27 5:17 ` David Miller
2006-07-27 5:46 ` Rusty Russell
2006-07-27 6:00 ` David Miller
2006-07-27 18:54 ` Stephen Hemminger
2006-07-28 8:21 ` David Miller
2006-07-28 5:54 ` Rusty Russell
2006-08-01 4:47 ` David Miller
2006-08-01 6:36 ` Rusty Russell
2006-07-27 16:33 ` Alexey Kuznetsov
2006-07-27 16:51 ` Evgeniy Polyakov
2006-07-27 20:56 ` Alexey Kuznetsov
2006-07-28 5:17 ` Evgeniy Polyakov
2006-07-28 5:34 ` David Miller
2006-07-28 5:47 ` Evgeniy Polyakov
2006-07-28 4:49 ` Rusty Russell
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