Bill Davidsen wrote:
I recently noted that my system was spending a lot of time in i/o wait
when doing some tasks which I thought didn't involve i/o, as noted by
the lack of disk light activity most of the time. I thought of network,
certainly the NIC had no activity for this job. So I set up a little
loop to capture all disk i/o and network activity (including loopback).
That was no obvious help, and the program doesn't use pipes.
At this point I'm really curious, does someone have a good clue?
Note: I don't think this is a bug or performance issue, unless the
kernel is doing something and charging time to iowait instead of system
I don't see anything to fix, but I would like to understand.
All filesystem IO and direct disk IO can cause iowait.
This includes NFS activity.
--
Politics is the struggle between those who want to make their country
the best in the world, and those who believe it already is. Each group
calls the other unpatriotic.
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