ompi/comm: Improve MPI_Comm_create algorithm (v2.x) #3376
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Efficiency verification |
Force only procs that are participating in the ne Comm to decide what
CID is appropriate. This will have 2 advantages:
* Speedup Comm creation for small communicators: non-participating procs
will not interfere
* Reduce CID fragmentation: non-overlaping groups will be allowed to use
same CID.
Signed-off-by: Artem Polyakov <[email protected]>
(cherry picked from commit f1f7f20)
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Do not merge until #3375 is merged. |
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Per discussion on the 2017-04-26 webex and per further discussion by the RMs on 2017-04-26, this appears to be an enhancement that isn't classified as a bug fix (e.g., no customer problems were cited). As such, we're dropping it from v2.1.x. |
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Signed-off-by: Artem Polyakov [email protected]
(cherry picked from commit 50a6d10)