Performing optimized collective operations in a irregular subcommunicator of compute nodes in a parallel computer
In a parallel computer, performing optimized collective operations in an irregular subcommunicator of compute nodes may be carried out by: identifying, within the irregular subcommunicator, regular neighborhoods of compute nodes; selecting, for each neighborhood from the compute nodes of the neighborhood, a local root node; assigning each local root node to a node of a neighborhood-wide tree topology; mapping, for each neighborhood, the compute nodes of the neighborhood to a local tree topology having, at its root, the local root node of the neighborhood; and performing a one way, rooted collective operation within the subcommunicator including: performing, in one phase, the collective operation within each neighborhood; and performing, in another phase, the collective operation amongst the local root nodes.
- Research Organization:
- International Business Machines Corp., Armonk, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- B554431
- Assignee:
- International Business Machines Corporation (Armonk, NY)
- Patent Number(s):
- 10,938,889
- Application Number:
- 16/437,119
- OSTI ID:
- 1805594
- Resource Relation:
- Patent File Date: 06/11/2019
- Country of Publication:
- United States
- Language:
- English
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