thread_pthread.c (native_sleep): sched_yield if GVL uncontended
Uncontended GVL waitqueue could mean a single CPU setup where
threads are starved and can't even insert themselves into our
waitqueue. So we force other threads to run upon releasing
the GVL in an uncontended state, in the hope that we can
avoid entering the slow path of ppoll and similar syscalls.
This should prevent test/ruby/test_thread.rb::test_signal_at_join
timeout problems on our single CPU FreeBSD CI machine.
thread_pthread.c (native_sleep): sched_yield if GVL uncontended
Uncontended GVL waitqueue could mean a single CPU setup where
threads are starved and can't even insert themselves into our
waitqueue. So we force other threads to run upon releasing
the GVL in an uncontended state, in the hope that we can
avoid entering the slow path of ppoll and similar syscalls.
This should prevent test/ruby/test_thread.rb::test_signal_at_join
timeout problems on our single CPU FreeBSD CI machine.
[ruby-core:90417] [Bug #15398]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66381 b2dd03c8-39d4-4d8f-98ff-823fe69b080e