Messages in this thread | | | Date | Fri, 24 Oct 2014 14:27:28 -0400 | Subject | CPU time not showing up in /proc/stat (or top) | From | Martin Martin <> |
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I have a virtual machine that's using ip_tables to set up some connection forwarding. According to top, sar and /proc/stat, I'm > 99% idle. However, perf says I'm only about 72% idle, with the rest all accounted for by swapper in __do_softirq and various network related functions, most involving VMXnet 3, since that's the network driver I'm using.
VMware's own performance monitoring roughly corresponds to what perf is saying: about 25% of cpu being used.
Is there some way to monitor the actual amount of CPU being used, that includes time spent in network drivers, servicing soft irqs and all like that?
If there's a better mailing list for this topic, I'm sorry for the noise and please let me know where I should post my question.
Thanks, Martin
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