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Re: Atomic compare and swap on Connect-IB

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I have had this issue before. Using atomics on Connect-IB requires different queue pair setup flags than ConnectX-3 (for example, IBV_EXP_QP_CREATE_ATOMIC_BE_REPLY), and probably requires using "experimental" verbs. mlx4-based atomics code DOES NOT work with mlx5. The perftest library contains an example of this setup, which I was able to modify for my application.

 

Anuj


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