DocumentCode :
3621005
Title :
Removing the Overhead from Software-Based Shared Memory
Author :
Z. Radovic;E. Hagersten
Author_Institution :
Uppsala University
fYear :
2001
fDate :
6/23/1905 12:00:00 AM
Firstpage :
9
Lastpage :
9
Abstract :
The implementation presented in this paper — DSZOOM-WF — is a sequentially consistent, fine-grained distributed software-based shared memory. It demonstrates a protocol-handling overhead below a microsecond for all the actions involved in a remote load operation, to be compared to the fastest implementation to date of around ten microseconds. The all-software protocol is implemented assuming some basic low-level primitives in the cluster interconnect and an operating system bypass functionality, similar to the emerging InfiniBand standard. All interrupt- and/or poll-based asynchronous protocol processing is completely removed by running the entire coherence protocol in the requesting processor. This not only removes the asynchronous overhead, but also makes use of a processor that otherwise would stall. The technique is applicable to both page-based and fine-grain software-based shared memory. DSZOOM-WF consistently demonstrates performance comparable to hardware-based distributed shared memory implementations.
Keywords :
"Delay","Application software","Hardware","Access protocols","Permission","Scalability","Access control","Coherence","Error correction codes","Information technology"
Publisher :
ieee
Conference_Titel :
Supercomputing, ACM/IEEE 2001 Conference
Print_ISBN :
1-58113-293-X
Type :
conf
DOI :
10.1145/582034.582090
Filename :
1592785
Link To Document :
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