Calculating the percentage completion of a process

sharathksin · 03-05-2006, 11:48 PM

I want to calculate the percentage completion of process and time remaining using a C program.I know the PID of the process to be monitored & that process will be running along with the C program.Can anybody help me with sample program.
Thanks in advance

chrism01 · 03-06-2006, 12:28 AM

Unless the process you are monitoring is telling you how it's doing eg logs each step it does, you can't calc how far it's got ...
Note that even that won't work (timewise) if the work to be done is variable, or the sys load varies significantly.

primo · 03-06-2006, 01:44 AM

I guess it won't be easy without modifying the program.
You can always use getrusage() to get the time spent so far and have the program in question print deltas when you send it signals (ie, SIGUSR1). The remaining time is always relative to the task at question and system load, too. Fortunately, getrusage() is precise enough because it says the effective time spent running.