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Date: Thu, 10 Jan 2008 15:29:12 -0600 From: "Chris Friesen" <cfriesen@...tel.com> To: James Chapman <jchapman@...alix.com> CC: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: questions on NAPI processing latency and dropped network packets James Chapman wrote: > What's changed in your application? Any real-time threads in there? > >>>From the top output below, looks like SigtranServices is consuming all > your CPU... There are two cpus, and SigtranServices is multithreaded with many threads. Most of these threads are affined to cpu0, a couple to cpu1. None of the threads are realtime. Top is showing 37% idle on cpu0, and 6% idle on cpu1, so not all the cpu is being consumed. However, I'm wondering if we're hitting bursty bits and we're just running out of time. I'm going to try a system with MAX_SOFTIRQ_RESTART bumped up a bit, and also enable profiling. Chris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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