performance check

harsshal · 04-03-2007, 01:10 PM

hello friends,i'm doing a project in linux in which i'm changing some kernel code.but now ,i dont know how to check the performance of the new kernel.how do i compare the new one with the old one?

ramram29 · 04-03-2007, 01:37 PM

Exactly what are you trying to compare, disk I/O, memory or cpu consumption. For disk I/O you can try running iostat, for memory run free or exmap, for cpu run top.

studioj · 04-03-2007, 05:54 PM

there are some benchmarking programs around like lmbench
http://lmbench.sourceforge.net/
and other unix benchmarking tools
some of them run some of them don't depending on your machine but you can find something

harsshal · 04-04-2007, 01:47 AM

i'm changing the page size in linux.so i wanted to check the performance of new papge size as compared to old one.mostly in terms of CPU performance...Could you plz explain me what is "top"??

timmeke · 04-04-2007, 09:02 AM

"top" is a command that lists the currently running processes and their CPU usage, as well as the total CPU load. Just try it and you'll see...