On Saturday, December 24, 2016 6:52:07 PM CET Bruno Haible wrote: > Wow, a 30x speed increase by using a lock instead of 'volatile'! > > Thanks for the testing. I cleaned up the patch to do less > code duplication and pushed it.
Thanks, that's nice speedup! And sorry for the delay.. I still see infinite hang on ppc64le (sometimes), as discussed in [1]. It looks like starvation of writers in test_rwlock(). Could we set PTHREAD_RWLOCK_PREFER_WRITER_NP (in test-lock.c) to avoid those issues? One thing I'm afraid of is that writers could finish too early. Could we could artificially slow them down? [1] https://lists.fedoraproject.org/archives/list/de...@lists.fedoraproject.org/thread/PQD576JZLERFY6ROI3GF7UYXKZIRI33G/ Pavel
