Irfan Habib <[email protected]> wrote:
> I wanted to ask how can I find the cpu usage of a
> process, as opposed to runtime, with cpu usage I mean
> actually how many time slices were awarded to a
> specific process
It is accounted in seconds in usermode and kernelmode (io processing), not
in slicess.
You can use the result wof wait3(2) if you are the parent:
/usr/bin/time -v sleep 3
Command being timed: "sleep 3"
User time (seconds): 0.00
System time (seconds): 0.00
Percent of CPU this job got: 0%
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:03.00
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 0
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 0
Minor (reclaiming a frame) page faults: 175
Voluntary context switches: 2
Involuntary context switches: 0
Swaps: 0
File system inputs: 0
File system outputs: 0
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
You could maybe also use BSD Job Accounting.
At runtime, the /proc interface is for you. See libproc for the data you can
query. /usr/include/proc/readroc.h:
utime, // stat user-mode CPU time accumulated by proces
stime, // stat kernel-mode CPU time accumulated by process
Gruss
Bernd
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