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Date: Sat, 1 May 2010 18:24:00 +0800 From: Changli Gao <xiaosuo@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: hadi@...erus.ca, David Miller <davem@...emloft.net>, therbert@...gle.com, shemminger@...tta.com, netdev@...r.kernel.org, Eilon Greenstein <eilong@...adcom.com>, Brian Bloniarz <bmb@...enacr.com> Subject: Re: [PATCH net-next-2.6] net: speedup udp receive path On Sat, May 1, 2010 at 2:14 PM, Eric Dumazet <eric.dumazet@...il.com> wrote: > > BTW, using ee mask, cpu4 is not used at _all_, even for the user > threads. Scheduler does a bad job IMHO. > > Using fe mask, I get all packets (sent at 733311pps by my pktgen > machine), and my CPU0 even has idle time !!! > > Limit seems to be around 800.000 pps > > ------------------------------------------------------------------------------------------------------------------------ > PerfTop: 5616 irqs/sec kernel:93.9% [1000Hz cycles], (all, 8 CPUs) > ------------------------------------------------------------------------------------------------------------------------ > Oh, cpu0 usage is about 100-(100-93.9)*8 = 51.2%(Am I right?). If we can do weighted packet distributing: cpu0's weight is 1, and other cpus are 2. maybe we can utilize all the cpu power. -- Regards， Changli Gao(xiaosuo@...il.com) -- 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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