Date: Wed, 12 Dec 2001 22:42:06 -0800 From: Luigi Rizzo <rizzo@aciri.org> To: current@freebsd.org Subject: -current vs. -stable network performance Message-ID: <20011212224206.D35108@iguana.aciri.org>
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Hi, I am testing the forwarding performance of CURRENT vs. STABLE (both more or less up to date, unmodified, with the latest performance patches to the "dc" driver, which I am using) and I am having some surprises. STABLE can forward approx 125Kpps, whereas CURRENT tops at approx 80Kpps. This is on the same hardware, 750MHz Athlon, fastforwarding enabled, a 4-port 21143 card, one input driven with a stream of up to 148Kpps (64 bytes each). Ability to transmit seems roughly the same (in both cases 138Kpps), and lack of CPU does not seem to be the problem (at least for CURRENT), so I am suspecting some difference in the initialization of PCI parameters, such as burst size etc, but I am unclear on where to look at. Any ideas ? cheers luigi ----------------------------------+----------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . ACIRI/ICSI (on leave from Univ. di Pisa) http://www.iet.unipi.it/~luigi/ . 1947 Center St, Berkeley CA 94704 Phone: (510) 666 2927 ----------------------------------+----------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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