On Tue, 19 Oct 2004, Andrew Gallatin wrote: > I hooked up the em0 GbE interfaces, and that leaks nearly as bad as my > myrinet nic (at least with a linux sender, hooked back-to-back). Em0 > seems to be leaking at a few thoundsand pkts/sec, so I wasn't brave > enough to do a long run.. Oh, I just had a thought. Could you try this patch (perhaps with tweaks to apply to recent kernels): http://www.watson.org/~robert/freebsd/netperf/20040910-atomic-mballoc.diff I ran with this change in the netperf branch for quite a long time, but never managed to trigger sufficient races on the allocator to result in the counters getting off by more than a couple. However, the reason I updated the patch and put it on the netperf page was that Bill Paul reported seeing fairly hefty stats errors on an SMP box at gig-e rates, and when he tried the patch it went away. It would be useful if you could try the patch to make sure that we're looking at a real mbuf leak and not an mbuf stat leak. Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert_at_fledge.watson.org Principal Research Scientist, McAfee ResearchReceived on Tue Oct 19 2004 - 19:50:52 UTC
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