Re: OT processes and cpu use

[Øyvind Røtvold <orotvold@gmail.com>]

Tyler Smith <tyler.smith@mail.mcgill.ca> writes:

[snip]
> Sorry for reposting, but I should add that my concern stems in part
> from top reporting that 27% of the CPU is being used by users, and 73%
> by system, which conflicts with the line item for paup, a user
> process, which shows 99% CPU use. So I'm not sure if paup is using 99%
> or 27% of the CPU:
>
> Cpu(s): 26.7%us, 73.3%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,
> 0.0%st
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND           
> 14385 tyler     25   0  141m 140m  660 R 99.7  9.3  82:34.35 paup  

This is a bit odd, as others have indicated this merely means that
this process spends over 70% of it's time in system mode.  This means
that it spends a lot of time producing output or communicating with
other processes or what have you.  If this program does purely
numerical analysis it should not be doing this, 'strace' or 'valgrind'
might tell you more.


-- 
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