On Wed, 2007-03-14 at 12:44 -0700, Jeremy Fitzhardinge wrote: > Daniel Walker wrote: > > sched_clock is used to bank real time against some specific states > > inside the scheduler, and no it doesn't _just_ measure a processes > > executing time. > > > > Could you point these places out? All uses of sched_clock() that I > could see in kernel/sched.c seemed to be related to working out how > long > something spent executing, either in the scheduler proper, or > benchmarking cache characteristics.
For interactive tasks (basic scheduling) the execution time, and sleep time need to be measured. It's also used for some posix cpu timers (sched_ns) , and it used for migration thread initialization. I'm sure it's used for a variety of out-of-tree random timing as well.. Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
