Re: [patch 1/4] - Potential performance bottleneck for Linxu TCP
From: David Miller
Date: Thu Nov 30 2006 - 15:39:16 EST
From: Ingo Molnar <mingo@xxxxxxx>
Date: Thu, 30 Nov 2006 21:30:26 +0100
> disk I/O is typically not CPU bound, and i believe these TCP tests /are/
> CPU-bound. Otherwise there would be no expiry of the timeslice to begin
> with and the TCP receiver task would always be boosted to 'interactive'
> status by the scheduler and would happily chug along at 500 mbits ...
It's about the prioritization of the work.
If all disk I/O were shut off and frozen while we copy file
data into userspace, you'd see the same problem for disk I/O.
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