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The assertions are racy and the use of `membar_exit()` did nothing to fix that. The helpers use atomic functions, so we cleverly get values from the atomics that we can use to ensure that the assertions operate on the correct values. We also use `membar_producer()` prior to decrementing reference counts so that operations that happened prior to a decrement to 0 will be guaranteed to happen before the decrement on architectures that reorder atomics. This also slightly improves performance by eliminating unnecessary reads, although I doubt it would be measurable in any benchmark. Reviewed-by: Mateusz Guzik <mjguzik@gmail.com> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #13880 |
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