Instead of polling nleft[i] (without appropriate memory barriers!) and using sleep() to detect the exit just call pthread_join() on all threads. Also replace the use of a mutex that guarding the increments with atomic fetch_add. This should reduce the runtime of this test on SMP systems. Finally, remove all the debug printfs unless DEBUG_OUTPUT is set in the environment. Test Plan: still fails sometimes on qemu (but maybe less often?) Reviewed By: jhb Differential Revision: https://reviews.freebsd.org/D29390 |
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