Issuing global shared memory operations via direct cache...

Details Issuing global shared memory operations via direct cache... Issuing global shared memory operations via direct cache...

2011-06-21

2011-06-21

Thomas, Shane M (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711SE12021, C712S028000

Reexamination Certificate

active

07966454

ABSTRACT:
A data processing system enables global shared memory (GSM) operations across multiple nodes with a distributed EA-to-RA mapping of physical memory. Each node has a host fabric interface (HFI), which includes HFI windows that are assigned to at most one locally-executing task of a parallel job. The tasks perform parallel job execution, but map only a portion of the effective addresses (EAs) of the global address space to the local, real memory of the task's respective node. The HFI window tags all outgoing GSM operations (of the local task) with the job ID, and embeds the target node and HFI window IDs of the node at which the EA is memory mapped. The HFI window also enables processing of received GSM operations with valid EAs that are homed to the local real memory of the receiving node, while preventing processing of other received operations without a valid EA-to-RA local mapping.

REFERENCES:
patent: 6628615 (2003-09-01), Joseph et al.
patent: 7360028 (2008-04-01), Tremblay
patent: 2004/0107265 (2004-06-01), Yasunaga
patent: 2005/0147114 (2005-07-01), Stewart et al.
patent: 2007/0073976 (2007-03-01), Chitlur et al.

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