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SubjectRe: Weird tcp performance differences with 2.0 and 2.2 kernels
On 9 Feb 1999, Mark R. Boyns wrote:

>server linux 2.2.1, 400mhz Pentium II, 3c905B Cyclone 100baseTx
>
> local client (loopback)
> 10 bytes 50.18 c/s
> 723 bytes 49.59 c/s
> 724 bytes 49.87 c/s
> 1024 bytes 50.14 c/s
> || $echo 'client.c:' 'MD5 check failed'

Could you try ftp://e-mind.com/pub/linux/arca-tree/2.2.2-pre2_arca-5.gz ?

The interesting patch in my tree for you should be only this but I'm too
lazy to extract it now by hand ;)

@@ -134,7 +139,7 @@
* Note: This also clears the "quick ack mode" bit.
*/
if(th->psh && (skb->len < (tp->mss_cache >> 1)))
- tp->ato = HZ/50;
+ tcp_enter_quickack_mode(tp);
}

/* Called to compute a smoothed rtt estimate. The data fed to this


Andrea Arcangeli


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