I am experiencing a problem, the general form of which occurs from
time to time on various systems of mine. The system shows a load, but
top shows a virtually idle cpu:
22:51:44 up 2:17, 2 users, load average: 1.01, 1.01, 0.96
40 processes: 37 sleeping, 3 running, 0 zombie, 0 stopped
CPU states: 0.5% user 1.9% system 0.0% nice 0.0% iowait 97.4% idle
Mem: 60600k av, 48296k used, 12304k free, 0k shrd, 8708k buff
34744k actv, 0k in_d, 184k in_c
Swap: 522104k av, 252k used, 521852k free 25896k cached
There are no nfs mounted filesystems. This particular box is a
firewall, so it it dual-homed, and it runs l2tpd to establish a tunnel
with a remote network, but that is only this particular instance. I
see systems rom time to time that exhibit a load that is not
associated with any noticable cpu use. I know the kernel can get
unhappy about certain resources other than just cpu utilization, but
how can I determine what is causing a load like this when the cpu is
idle?
Generally, is there some well defined way to find what is throwing a
load on a box. I guess a closely related questions is: How is "load"
computed? If I knew all the factors that affect this mysterious
number, I would better be able to figure this out.
--
-------- "And there came a writing to him from Elijah" [2Ch 21:12] --------
R. J. Brown III rj@xxxxxxxxxxx http://www.elilabs.com/~rj voice 859 567-7311
Elijah Laboratories Inc. P. O. Box 166, Warsaw KY 41095 fax 859 567-7311
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