Re: questions on NAPI processing latency and dropped network packets

[Chris Friesen]

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@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/