netdev - Re: tcp bw in 2.6

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Message-ID: <20071002164858.GH17418@bitmover.com>
Date:	Tue, 2 Oct 2007 09:48:58 -0700
From:	lm@...mover.com (Larry McVoy)
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Larry McVoy <lm@...mover.com>,
	Herbert Xu <herbert@...dor.apana.org.au>, davem@...emloft.net,
	wscott@...mover.com, netdev@...r.kernel.org
Subject: Re: tcp bw in 2.6

Isn't this something so straightforward that you would have tests for it?
This is the basic FTP server loop, doesn't someone have a big machine with
10gig cards and test that sending/recving data doesn't regress?

> Sounds like a bug to me, modulo the above caveat of making sure that it's 
> not some hw/driver/switch kind of difference.

Pretty unlikely given that we've changed the switch, the card works fine
in the other direction, and I'm 95% sure that we used to get better perf
before we switched to a more recent kernel.

I'll try and find some other gig ether cards and try them.
-- 
---
Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com
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