Measuring system call times, elapsed and cpu

[Stone, Joshua I]

Mike Mason wrote:
> Now that I think about it some more, utime and stime aren't fine
> grained enough.  They're only updated every timer tick.  Is there
> some other way to measure real cpu time between function entry and
> exit?

CFS offers better precision through task_utime() and task_stime(), but
those don't appear to be exported.

Josh