Determining collective barrier operation skew in a parallel computer
US9195516B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 2011 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Jun 29, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/522
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Determining collective barrier operation skew in a parallel computer that includes a number of compute nodes organized into an operational group includes: for each of the nodes until each node has been selected as a delayed node: selecting one of the nodes as a delayed node; entering, by each node other than the delayed node, a collective barrier operation; entering, after a delay by the delayed node, the collective barrier operation; receiving an exit signal from a root of the collective barrier operation; and measuring, for the delayed node, a barrier completion time. The barrier operation skew is calculated by: identifying, from the compute nodes' barrier completion times, a maximum barrier completion time and a minimum barrier completion time and calculating the barrier operation skew as the difference of the maximum and the minimum barrier completion time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.