find out how much time an already running process is spending in user and kernel spac
 

Good evening,

I am currently struggling with one of my tasks.
I was asked to find a way how to determine how much time an _already running_ process is spending in user and kernel space.

E.G. <some tool> <pid>
[Control] + [c]

<pid> spent 12.1 seconds in user and 1.52 seconds in kernel space.


Does something like this exist? Basically I guess I am looking for something similar to time, except that the process is already running.

So..
a) Is there a tool which fulfills this task?
b) Is there a way to write your own software which does the job? Is it even possible to code something I am looking for?

I recently found strace -c -p <pid>, but well, this is not exactly what I was looking for.

Any reply is highly appreciated.

Best regards,
Valentin

I'm not sure exactly what you want, but check out the 'time' command which takes programs as argument and displays elapsed time.

I am looking for a possibility to use something like "time" for processes which are already running.

Like using "time" on a running slapd.

time only offers the possibility to track the stats for new processes, but not for running ones.

Any help would be highly appreciated. I need to find out how much time a process spends in user/kernel space, but the command was not startet with "time".