v2.0.x comm CID refactor #2381
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v2.0.x comm CID refactor #2381
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(cherry picked from commit 7397276) Signed-off-by: Nathan Hjelm <[email protected]>
This commit simplifies the communicator context ID generation by removing the blocking code. The high level calls: ompi_comm_nextcid and ompi_comm_activate remain but now call the non-blocking variants and wait on the resulting request. This was done to remove the parallel paths for context ID generation in preperation for further improvements of the CID generation code. Signed-off-by: Nathan Hjelm <[email protected]> (cherry picked from commit 035c2e2) Signed-off-by: Nathan Hjelm <[email protected]>
(cherry picked from commit 36a9063) Signed-off-by: Nathan Hjelm <[email protected]>
Back-ported from 01a653d Signed-off-by: Nathan Hjelm <[email protected]> (cherry picked from commit b8c9f13) Signed-off-by: Nathan Hjelm <[email protected]>
…_allreduce_intra_pmix_nb() (cherry picked from commit bbc6d4b) Signed-off-by: Nathan Hjelm <[email protected]>
(cherry picked from commit ba77d9b) Signed-off-by: Nathan Hjelm <[email protected]>
This commit should restore the pre-non-blocking behavior of the CID allocator when threads are used. There are two primary changes: 1) do not hold the cid allocator lock past the end of a request callback, and 2) if a lower id communicator is detected during CID allocation back off and let the lower id communicator finish before continuing. Signed-off-by: Nathan Hjelm <[email protected]> (cherry picked from commit fbbf743)
This commit updates the intercomm allgather to do a local comm bcast as the final step. This should resolve a hang seen in intercomm tests. Signed-off-by: Nathan Hjelm <[email protected]> (cherry picked from commit 54cc829)
use MPI_MIN instead of MPI_MAX when appropriate, otherwise a currently used CID can be reused, and bad things will likely happen. Refs open-mpi#2061 (cherry picked from commit 3b968ec) Signed-off-by: Nathan Hjelm <[email protected]>
(cherry picked from commit 6c6e35b) Signed-off-by: Nathan Hjelm <[email protected]>
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bosilca
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Nov 8, 2016
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I confirm that this fixes COMM_SPAWN problems (#2234). |
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Fixes #2380