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blanket_cat
Asked: 2014-07-12 01:24:55 +0800 CST

top says iwlwifi's pr is -51

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My understanding is that the pr value is the nice +20. So how can a process have a pr value less than 0?

PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND
619 root     -51   0     0    0    0 S   3.6  0.0   5:37.44 [irq/46-iwlwifi]
process-priority

1 Answers

  1. Best Answer

    PR here is the value of the real-time priority, you can check its value for irq/47-iwlwifi with the ps command: 

    $ ps -eo pid,rtprio,ni,pri,comm 
  PID RTPRIO  NI PRI COMMAND
[...]
  497     50   -  90 irq/47-iwlwifi

    Source.

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