After using the system-wide performance tools to figure out which process is slowing down the system, you must apply the process-specific performance tools to figure out how the process is behaving. Linux provides a rich set of tools to track the important statistics of a process and application's performance.
After reading this chapter, you should be able to
Determine whether an application's runtime is spent in the kernel or application.
Determine what library and system calls an application is making and how long they are taking.
Profile an application to figure out what source lines and functions are taking the longest time to complete.