Date: Thu, 13 Dec 2001 11:13:08 -0800 From: "Bruce A. Mah" <bmah@FreeBSD.ORG> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Luigi Rizzo <rizzo@aciri.org>, current@FreeBSD.ORG Subject: Re: -current vs. -stable network performance Message-ID: <200112131913.fBDJD8d38312@bmah.dyndns.org> In-Reply-To: <200112131839.fBDId7v70103@apollo.backplane.com> References: <20011212224206.D35108@iguana.aciri.org> <200112131839.fBDId7v70103@apollo.backplane.com>
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--==_Exmh_-1567691784P Content-Type: text/plain; charset=us-ascii If memory serves me right, Matthew Dillon wrote: > I've noticed that -current has much lower TCP performance. I haven't > had time to investigate it but I presume there is some overhead > somewhere that is killing it. Here's a data point but I'm not sure how useful it is. At the start of December I was using tcpreplay to spew packets from a stored trace into a testbed network as fast as the CPU could go, and I saw: 5-CURRENT (11/19): 9244 pps, 35.6 Mbps 4-STABLE (late November): 21827 pps, 84 Mbps These measurements were on the same machine, which is a 1.7 GHz P4, 512MB RAM, ATA disk. Network interface was a four-port dc-type card. GENERIC kernels. These are "typical" numbers, but fairly repeatable over various trace files I was using. At the time I was more interested in being able to get packets on the network quickly than in why there was a performance difference, so I just plopped 4-STABLE on the machine without doing any other investigation. Bruce. --==_Exmh_-1567691784P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: Exmh version 2.3.1+ 05/14/2001 iD8DBQE8GP3E2MoxcVugUsMRAu88AJ9Rg+aRhCHEffS7jjHuJhdK4Pa82QCg6X9m fESGtg1i5rSEDCyj5R5HJsA= =AoN6 -----END PGP SIGNATURE----- --==_Exmh_-1567691784P-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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