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This commit fixes the following bugs: - Allow a btl to be used for communication if it can communicate with all non-self peers and it supports global atomic visibility. In this case CPU atomics can be used for self and the btl for any other peer. - It was possible to get into a state where different threads of an MPI process could issue conflicting accumulate operations to a remote peer. To eliminate this race we now update the peer flags atomically. - Queue up and re-issue put operations that failed during a BTL callback. This can occur during an accumulate operation. This was an unhandled error case. Signed-off-by: Nathan Hjelm <[email protected]>
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