CPU and memory usage??
 

Can any one suggest a profiler or a command to get the exact cpu and memory usage of the system?? Some suggest valgrind, but i need the output in text format whereas valgrind displays it in graphical mode..

Define "exact"

exact in the sense that ps command will only get the amount of memory pages allocated by that process,does not reflect the actual amount of memory used by the application. I need something tat gives the actual memory used by the process.

Meaning what ??? Way too nebulous.
Have a look at pmap, /proc/<pid>/maps and probably most useful /proc/<pid>/smaps

But the way shared libraries are (not) accounted for in Linux, all the numbers you can come up with will be fuzzy. Exact ain't a description I'd be using in any sense of the word.