At present, we only replace sched_yield(2) on Linux as the replacements are non-portable. If other operating systems are known to have problem sched_yield(2) implementations, I suggest filing a separate ITS with details and suggested replacement.
Kurt At 07:18 AM 1/6/2006, Igor Brezac wrote: >On Thu, 5 Jan 2006, Kurt D. Zeilenga wrote: > >>At 08:05 PM 1/5/2006, Kurt D. Zeilenga wrote: >>>>I suppose we could devise some kind of test that uses two processes, one >>>>that spins eating CPU cycles, and another that spawns one thread that does >>>>a yield, while the main thread does a computation. If the yield causes the >>>>entire process to lose the CPU, the main thread's computation will be >>>>impeded. But it may be better to just test $build_os for now. >>> >>>For now, yes >> >>Okay, I've committed a basic detection code for >>REPLACE_SCHED_YIELD as well as updated replacement >>code. Currently uses select(2), but can be switched >>to nanosleep(2). >> >>I've only tested on FreeBSD4 where this is a no-op. >>Now pushing to a Linux box for real testing. > >nanosleep(2) should work on Solaris (at least 8, 9 and 10) as well. > >-- >Igor
