[erlang-questions] Strange CPU usage...

jm <>
Fri Jul 3 02:14:43 CEST 2009



G.S. wrote:
> I've tried everything, but after a month of testing different stuff, the
> only consistent part in this 100% cpu usage is that it occurs every once in
> a while after I run my Erlang program, the thing that is strange is that
> even after I kill the node, the cpu is still bogged down. The System Monitor
> (Top), doesn't even show a process that uses 100% of the cpu, yet at the
> same time shows the CPU as being in 100% use.
>
>   

Strange. What's the breakdown of the CPU usage? is it user, wait, or 
something else?

in top hit the "1" key this should break the usage down by CPU you 
should see something similar to

top - 10:13:01 up 288 days, 12:32,  1 user,  load average: 0.00, 0.02, 0.06
Tasks:  88 total,   1 running,  87 sleeping,   0 stopped,   0 zombie
Cpu0  :  0.7%us,  0.0%sy,  0.0%ni, 99.3%id,  0.0%wa,  0.0%hi,  0.0%si,  
0.0%st    <--***
Cpu1  :  0.7%us,  0.3%sy,  0.0%ni, 98.7%id,  0.0%wa,  0.0%hi,  0.3%si,  
0.0%st    <--***
Mem:   3367504k total,  3224704k used,   142800k free,   149220k buffers
Swap:  2031608k total,       36k used,  2031572k free,  2744644k cached


Try a different kernel version. It could be a kernel or driver bug.

Jeff.



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