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Output of ps -ef command

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# 1  
Old 01-06-2005
Output of ps -ef command
Can someone tell me the meaning of the column 'C' contained in the output of the ps -ef command?

UID PID PPID C STIME TTY TIME COMMAND

I was once told that if the value was higher then 0 and the process showed to be in a state of sleep when running a top then the command had timed out and can be killed?!!

Thanks in advance
# 2  
Old 01-06-2005
Found this here You should probably visit to see this text in context with the example given....

Quote:
The C column is the processor utilization. With the exception of the ps command, all of the other processes listed are waiting for some event, such as another process to exit or (as in the case of shell processes) are waiting for user input. Note that in this example all of the entries have a 0 (zero) in the C column. This does not mean they have used no CPU time, but rather it is so low that it is reported as zero
Cheers
ZB
# 3  
Old 01-06-2005
man says .....


C
(-f, l, and -l flags) CPU utilization of process or thread, incremented each
time the system clock ticks and the process or thread is found to be running.
The value is decayed by the scheduler by dividing it by 2 once per second. For
the sched_other policy, CPU utilization is used in determining process
scheduling priority. Large values indicate a CPU intensive process and result
in lower process priority whereas small values indicate an I/O intensive
process and result in a more favorable priority.
# 4  
Old 01-06-2005
Thanks BZ. Am I right in thinking that if the process has 254 in the C column and is in a state of sleep, that it is no longer running but in a continual loop or a process it's relying on has died?

Thanks again
# 5  
Old 01-06-2005
bhargav - out of interest which *nix are you using? The HP-UX 10.20 and SUSE 8.2 man pages have nothing on this....

Cheers
ZB
# 6  
Old 01-06-2005
$ uname -a | cut -d" " -f 1,3-
AIX 3 4 000936434C00
# 7  
Old 01-06-2005
Quote:
Originally posted by dbrundrett
Thanks BZ. Am I right in thinking that if the process has 254 in the C column and is in a state of sleep, that it is no longer running but in a continual loop or a process it's relying on has died?

Thanks again
You can't all of that stuff from the value 254. If it's in a state a sleep, it recently arrived at a state of sleep and the C value should continue to decay all the way to zero. "no longer running but in a continual loop" is not even self-consistant. A process that is in a loop would be running. You can't tell if the process is relying on another process from this number.
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