On Jan 25, 11:59 pm, Paddy <[EMAIL PROTECTED]> wrote: > On Jan 26, 5:43 am, Karthik Gurusamy <[EMAIL PROTECTED]> wrote: > > > > > Hi, > > > Wondering if there is a way to measure a child process's cpu usage > > (sys and user) when the child is still running. I see os.times() > > working fine in my system (Linux 2.6.9-42.7.ELsmp), but it gives valid > > data only after the child has exited. When the child is alive, > > os.times() data for child is zero for both child-sys and child-user > > cpu. > > > My script (process P1) launches child process P2 (using > > popen2.Popen3). P2 is a long running process (big compilation). Every > > minute or so, from P1, I want to measure how much cpu P2 has consumed > > and based on that I can make some estimate on the completion time of > > P2 (I have a rough idea how much total cpu P2 needs to complete). > > > I understand it may be too expensive to update this information to the > > parent process when any of the child/grand-child completes; but > > wondering if any there is any way to get this info; the expensive > > operations is on-demand only when the request is made. > > > Thanks, > > Karthik > > I had a similar requirement in December and found: > http://lilypond.org/~janneke/software/ > > proc-time.c and proc-time.py poll /proc/.... files whilst command > is running to get stats.
Great, thanks. From proc-time.py looks like all I want are the fields 13 to 16 of /proc/<child-pid>/stat. And I see them updated in real time (probably the kernel does it on a periodic interrupt). Thanks, Karthik > > Enjoy, - Paddy. -- http://mail.python.org/mailman/listinfo/python-list
