change the sampling time in the gprof

[Zack Weinberg]

Ian Lance Taylor <ian@wasabisystems.com> writes:

> On typical Unix systems, as well as on GNU/Linux, the precision of the
> gprof timer is determined by the behaviour of the profil() function.
> I don't know whether there is any way to adjust that on your
> particular system.

Linux (the kernel) does not implement profil().  glibc uses
setitimer() and SIGPROF for profiling.

zw