I found this term in https://rcs.uwaterloo.ca/~ali/cs854-f23/papers/topdown.pdf
For example, incorrect data speculation generated Memory Ordering Nukes [7] - a subset of Machine Clears.
What is it and when it happens?
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1Related: Why flush the pipeline for Memory Order Violation caused by other logical processors? / How do modern Intel x86 CPUs implement the total order over stores (pipeline nuke on load order mis-speculation) / Why memory reordering is not a problem on single core/processor machines? (machine clear can happen on mis-speculated store forwarding: memory disambiguation is dynamically predicted).Peter Cordes– Peter Cordes2025-01-14 20:49:38 +00:00Commented Jan 14 at 20:49
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Also What are the latency and throughput costs of producer-consumer sharing of a memory location between hyper-siblings versus non-hyper siblings? - machine clears happen much more frequently for that specific case when threads share a physical core.Peter Cordes– Peter Cordes2025-01-14 20:49:48 +00:00Commented Jan 14 at 20:49
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