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Re: bad TSO performance in 2.6.9-rc2-BK

To: "David S. Miller" <davem@xxxxxxxxxxxxx>
Subject: Re: bad TSO performance in 2.6.9-rc2-BK
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 30 Sep 2004 10:10:07 +1000
Cc: John Heffner <jheffner@xxxxxxx>, ak@xxxxxxx, niv@xxxxxxxxxx, andy.grover@xxxxxxxxx, anton@xxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20040929170310.46c58095.davem@davemloft.net>
References: <20040929162923.796d142e.davem@davemloft.net> <Pine.NEB.4.33.0409291945100.3434-100000@dexter.psc.edu> <20040929170310.46c58095.davem@davemloft.net>
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On Wed, Sep 29, 2004 at 05:03:10PM -0700, David S. Miller wrote:
>
> I think there are some other things we can do to make TSO work
> even better.  We turn off TSO currently when we get SACKs, that

Great.  This way we can also fix the fack_count in
tcp_sacktag_write_queue().  Currently it always counts
tso_factor packets even though the sack may only cover
part of the TSO packet.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
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