highest nice(1) -n increment value?

[Greg Larkin]

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On 7/8/13 6:48 AM, Anton Shterenlikht wrote:
> It is not clear from the nice(1) man page, i.e. for /usr/bin/nice,
> not a shell built-in nice, what is the highest increment value nice
> will accept.
> 
> It seems it is limited to 20. I tried
> 
> $ /usr/bin/nice -n 100 portmaster -a
> 
> But all processes spawned by the portmaster have the nice value of
> only 20, as in:
> 
> PID USERNAME    THR PRI NICE   SIZE    RES STATE    TIME    WCPU
> COMMAND 57586 root          1  52   20 13976K  4720K wait     0:00
> 0.39% sh 52729 root          1  40   20 13976K  4960K wait     0:02
> 0.00% sh 58239 root          1  92   20 35632K  8584K RUN      0:00
> 0.00% pkg 58237 root          1  52   20  9216K  1616K ppwait
> 0:00   0.00% make
> 
> The root shell priority was 0.
> 
> So is 20 the upper increment limit?
> 
> Thanks
> 
> Anton

Yes, please check the setpriority man page:
http://www.freebsd.org/cgi/man.cgi?query=setpriority

"The prio argument is a value in the range -20 to 20.  The default
priority is 0; lower priorities cause more favorable scheduling."

Hope that helps,
Greg
- -- 
Greg Larkin

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