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Re: tcp bw in 2.6

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From: Larry McVoy <lm@...>
To: Larry McVoy <lm@...>, John Heffner <jheffner@...>, Herbert Xu <herbert@...>, <torvalds@...>, <davem@...>, <wscott@...>, <netdev@...>
Subject: Re: tcp bw in 2.6
Date: Tuesday, October 2, 2007 - 3:33 pm

More data, we've conclusively eliminated the card / cpu from the mix.
We've got 2 ia64 boxes with e1000 interfaces.  One box is running
linux 2.6.12 and the other is running hpux 11.

I made sure the linux one was running at gigabit and reran the tests
from the linux/ia64 <=> hp/ia64.  Same results, when linux sends
it is slow, when it receives it is fast.

And note carefully: we've removed hpux from the equation, we can do
the same tests from linux to multiple linux clients and see the same
thing, sending from the server is slow, receiving on the server is
fast.
-- 
---
Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com
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Messages in current thread:
Re: tcp bw in 2.6, Larry McVoy, (Mon Oct 1, 8:59 pm)
Re: tcp bw in 2.6, Herbert Xu, (Tue Oct 2, 6:52 am)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 11:09 am)
Re: tcp bw in 2.6, Linus Torvalds, (Tue Oct 2, 3:27 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 3:53 pm)
Re: tcp bw in 2.6, David Miller, (Tue Oct 2, 4:33 pm)
Re: tcp bw in 2.6, Roland Dreier, (Tue Oct 2, 4:44 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 5:21 pm)
Re: tcp bw in 2.6, Pekka Pietikainen, (Wed Oct 3, 5:13 pm)
Re: tcp bw in 2.6, Larry McVoy, (Wed Oct 3, 5:23 pm)
Re: tcp bw in 2.6, Pekka Pietikainen, (Wed Oct 3, 5:50 pm)
Re: tcp bw in 2.6, John Heffner, (Tue Oct 2, 2:29 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 3:07 pm)
Re: tcp bw in 2.6, Linus Torvalds, (Tue Oct 2, 3:29 pm)
Re: tcp bw in 2.6, David Miller, (Tue Oct 2, 4:31 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 3:33 pm)
Re: tcp bw in 2.6, John Heffner, (Tue Oct 2, 3:53 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 4:14 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 4:40 pm)
Re: tcp bw in 2.6, Wayne Scott, (Tue Oct 2, 4:42 pm)
Re: tcp bw in 2.6, Linus Torvalds, (Tue Oct 2, 5:56 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 11:41 am)
Re: tcp bw in 2.6, Linus Torvalds, (Tue Oct 2, 12:34 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 12:48 pm)
Re: tcp bw in 2.6, David Miller, (Tue Oct 2, 5:16 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 5:26 pm)
Re: tcp bw in 2.6, David Miller, (Tue Oct 2, 5:47 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 6:17 pm)
Re: tcp bw in 2.6, David Miller, (Tue Oct 2, 6:32 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 6:36 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 6:59 pm)
Re: tcp bw in 2.6, David Miller, (Wed Oct 3, 4:02 am)
Re: tcp bw in 2.6, Ben Greear, (Tue Oct 2, 12:48 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 1:11 pm)
Re: tcp bw in 2.6, Ben Greear, (Tue Oct 2, 1:18 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 1:21 pm)
Re: tcp bw in 2.6, Stephen Hemminger, (Tue Oct 2, 1:54 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 2:35 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 12:25 pm)
Re: tcp bw in 2.6, Stephen Hemminger, (Tue Oct 2, 12:47 pm)
Re: tcp bw in 2.6, Daniel Schaffrath, (Mon Oct 15, 8:40 am)
Re: tcp bw in 2.6, Stephen Hemminger, (Mon Oct 15, 11:49 am)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 12:49 pm)
Re: tcp bw in 2.6, Stephen Hemminger, (Tue Oct 2, 1:10 pm)
Re: tcp bw in 2.6, Linus Torvalds, (Mon Oct 1, 10:14 pm)
Re: tcp bw in 2.6, Larry McVoy, (Mon Oct 1, 10:20 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 1:14 pm)
Re: tcp bw in 2.6, Bill Fink, (Wed Oct 3, 3:19 am)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 1:20 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 2:01 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 2:40 pm)
Re: tcp bw in 2.6, Rick Jones, (Tue Oct 2, 3:47 pm)
Re: tcp bw in 2.6, David Miller, (Tue Oct 2, 5:32 pm)
Re: tcp bw in 2.6, John Heffner, (Tue Oct 2, 11:06 am)
Re: tcp bw in 2.6, David Miller, (Mon Oct 1, 11:50 pm)
Re: tcp bw in 2.6, Larry McVoy, (Tue Oct 2, 12:23 am)