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Date: Mon, 09 Mar 2009 18:56:35 -0400 From: Brian Bloniarz <bmb@...enacr.com> To: Eric Dumazet <dada1@...mosbay.com> CC: kchang@...enacr.com, netdev@...r.kernel.org Subject: Re: Multicast packet loss Eric Dumazet wrote: > Here is a patch that helps. It's still an RFC of course, since its somewhat ugly :) Hi Eric, I did some experimenting with this patch today -- we're users, not kernel hackers, but the performance looks great. We see no loss with mcasttest, and no loss with our internal test programs (which do much more user-space work). We're very encouraged :) One thing I'm curious about: previously, setting /proc/irq/<eth0>/smp_affinity to one CPU made things perform better, but with this patch, performance is better with smp_affinity == ff than with smp_affinity == 1. Do you know why that is? Our tests are all with bnx2 msi_disable=1. I can investigate with oprofile tomorrow. Thank you for your continued help, we all deeply appreciate having someone looking at this workload. Thanks, Brian Bloniarz -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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