track cpu usage of linux application

[Fabian Braennstroem]

Hi,

I would like to track the cpu usage of a couple of
programs using python. Maybe it works somehow with
piping 'top' to python read the cpu load for a greped
application and clocking the the first and last
appearence. Is that a good approach or does anyone have
a more elegant way to do that?

Greetings!
Fabian

 

[James T. Dennis]

Hi,

I would like to track the cpu usage of a couple of
programs using python. Maybe it works somehow with
piping 'top' to python read the cpu load for a greped
application and clocking the the first and last
appearence. Is that a good approach or does anyone have
a more elegant way to do that?

Greetings!
Fabian

If you're on a Linux system you might be far better accessing
the /proc/$PID/stat files directly. The values you'd find therein
are documented:

http://www.die.net/doc/linux/man/man5/proc.5.html

(among other places).

Of course you could write you code to look for file and fall back
to use the 'ps' command if it fails. In addition you can supply
arguments to the 'ps' command to limit it to reporting just on the
process(es) in which you are interested ... and to eliminate the
header line and irrelevant columns of output.

 

[Fabian Braennstroem]

Hi,
thanks to both! I will take a look at the proc files!

If you're on a Linux system you might be far better accessing
the /proc/$PID/stat files directly. The values you'd find therein
are documented:

http://www.die.net/doc/linux/man/man5/proc.5.html

(among other places).

Of course you could write you code to look for file and fall back
to use the 'ps' command if it fails. In addition you can supply
arguments to the 'ps' command to limit it to reporting just on the
process(es) in which you are interested ... and to eliminate the
header line and irrelevant columns of output.

Greetings!
Fabian