| To: | "David S. Miller" <davem@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: bad TSO performance in 2.6.9-rc2-BK |
| From: | Andi Kleen <ak@xxxxxxx> |
| Date: | Thu, 23 Sep 2004 00:47:32 +0200 |
| Cc: | Andi Kleen <ak@xxxxxxx>, andy.grover@xxxxxxxxx, anton@xxxxxxxxx, netdev@xxxxxxxxxxx |
| In-reply-to: | <20040922152535.7bc81c8a.davem@xxxxxxxxxxxxx> |
| References: | <20040920063012.GL2825@krispykreme> <20040920203021.GD4242@xxxxxxxxxxxxx> <20040921155835.18aee381.davem@xxxxxxxxxxxxx> <20040922140000.GD27432@xxxxxxxxxxxxx> <20040922111209.7887df53.davem@xxxxxxxxxxxxx> <20040922195515.GA2619@xxxxxxxxxxxxx> <c0a09e5c04092213126ba5f29d@xxxxxxxxxxxxxx> <20040922133906.7d57ef49.davem@xxxxxxxxxxxxx> <20040922220628.GC2619@xxxxxxxxxxxxx> <20040922152535.7bc81c8a.davem@xxxxxxxxxxxxx> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Wed, Sep 22, 2004 at 03:25:35PM -0700, David S. Miller wrote: > On Thu, 23 Sep 2004 00:06:28 +0200 > Andi Kleen <ak@xxxxxxx> wrote: > > > > One thing that could be biting us is the nagle check which > > > probably needs to be adjusted to use the standard MSS not > > > the TSO one... perhaps play with this patch: > > > > I tried it and it breaks the performance completely > > (21MB/s) > > You said you were getting 22MB/sec before the change, right? 22-23MB/s, but not 21MB/s. Ok "breaks completely" was a bit of overstatement, admitted. -Andi |
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