UTIL: fix memory barrier for aarch64

openucx / ucc

Unified Collective Communication Library

https://openucx.github.io/ucc/

BSD 3-Clause "New" or "Revised" License

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Closed Sergei-Lebedev closed 3 months ago

Sergei-Lebedev commented 3 months ago

Fixes memory barrier in TL SHM.

dmb guarantees only ordering, with dsb we correctly wait for store to finish before signaling

janjust commented 3 months ago

@bureddy Hey Deva, can you take a quick look - super small patch, but fixes a critical issue on GH systems.