Question

I want to check time taken by each function and system calls made by each function in my project .My code is part of user as well as kernel space. So i need time taken in both space. I am interested to know performance in terms of CPU time and Disk IO. Should i use profiler tool ? if yes , which will be more preferable ? or what other option i have ?

Please help,
Thanks

Answer 1

Well I only develop in userspace so I don’t know, how much this will help you with disk IO or Kernelspace profiling, but I profiled a lot with oprofile.

I haven’t used it in a while, so I cannot give you a step by step guide, but you may find more informations here:

http://oprofile.sourceforge.net/doc/results.html

Usually this helped me finding my problems.
You may have to play a bit with the opreport output, to get the results you want.