On Sun, 2014-06-29 at 22:56 +0200, Samuel Thibault wrote: > Hello, > > The following simple program gives unreliable results both on Linux and > > especially Hurd: > > Again, what do you mean by "unreliable"? What did you expect? I'd expected an elapsed time of 3 seconds with a sleep(3) in between start and stop. That's the usage in the libsamplerate code. If it is computer CPU time to execute the command sleep(3) the result seems reasonable.