Re: [PATCH] softirq: let ksoftirqd do its job
From: Jesper Dangaard Brouer <hidden>
Date: 2016-09-01 12:30:23
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On Thu, 1 Sep 2016 13:53:56 +0200 Peter Zijlstra [off-list ref] wrote:
On Thu, Sep 01, 2016 at 01:02:31PM +0200, Jesper Dangaard Brouer wrote:quoted
PID S %CPU TIME+ COMMAND 3 R 50.0 29:02.23 ksoftirqd/0 10881 R 10.7 1:01.61 udp_sink 10837 R 10.0 1:05.20 udp_sink 10852 S 10.0 1:01.78 udp_sink 10862 R 10.0 1:05.19 udp_sink 10844 S 9.7 1:01.91 udp_sink This is strange, why is ksoftirqd/0 getting 50% of the CPU time???Do you run your udp_sink thingy in a cpu-cgroup?
That was also Paolo's feedback (IRC). I'm not aware of it, but it might be some distribution (Fedora 22) default thing. How do I verify/check if I have enabled a cpu-cgroup? -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer