vitaliy

Hi,

I have a question about calculating CPU usage for a certain process on Linux. I need to be able to calculate CPU utilization for a process and its threads given a PID or a name. Unfortunately, "top" is slow and my version of "ps" does not support calculating CPU usage in the raw mode. For this particular purpose, I'd like to calculate CPU usage using either system programming or by having some sort of a script that reads through /proc filesystem. Does anybody know how to do this by using any of those or other methods? Many thanks in advance.

--V

Salem

At your prompt type
time ./a.out
(or whatever your program is called)
When it exits, the shell will print out some timing information.

__________________
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Up to 8Mb PlusNet broadband from only £5.99 a month!

vitaliy

This may work, unfortunately, I need real time stats update every second or so in order to plot a graph of CPU utilization. I am trying to benchmark a server and I am interested in how it handles QPS over time.

Thank you.

Salem

http://www.die.net/doc/linux/man/man2/times.2.html

__________________
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
Up to 8Mb PlusNet broadband from only £5.99 a month!