scholarly journals Multithreaded self-scheduling: application of multithreading on loop scheduling for distributed shared memory multiprocessor

2002 ◽  
Author(s):  
K.P. Hung ◽  
N.H.C. Yung ◽  
Y.S. Cheung
Keyword(s):  
Shared Memory ◽  
Distributed Shared Memory ◽  
Loop Scheduling ◽  
Shared Memory Multiprocessor

scholarly journals Cluster-Enabled OpenMP: An OpenMP Compiler for the SCASH Software Distributed Shared Memory System

2001 ◽  
Vol 9 (2-3) ◽  
pp. 123-130 ◽  
Author(s):  
Mitsuhisa Sato ◽  
Hiroshi Harada ◽  
Atsushi Hasegawa ◽  
Yutaka Ishikawa
Keyword(s):  
Shared Memory ◽  
Programming Model ◽  
Distributed Shared Memory ◽  
Memory System ◽  
Data Mapping ◽  
Loop Scheduling ◽  
Parallel Programming Model ◽  
Scheduling Method ◽  
Shared Memory System ◽  
Software Distributed Shared Memory

OpenMP is attracting wide-spread interest because of its easy-to-use parallel programming model for shared memory multiprocessors. We have implemented a "cluster-enabled" OpenMP compiler for a page-based software distributed shared memory system, SCASH, which works on a cluster of PCs. It allows OpenMP programs to run transparently in a distributed memory environment. The compiler transforms OpenMP programs into parallel programs using SCASH so that shared global variables are allocated at run time in the shared address space of SCASH. A set of directives is added to specify data mapping and loop scheduling method which schedules iterations onto threads associated with the data mapping. Our experimental results show that the data mapping may greatly impact on the performance of OpenMP programs in the software distributed shared memory system. The performance of some NAS parallel benchmark programs in OpenMP is improved by using our extended directives.

scholarly journals Cache Coherence Protocols in Distributed Systems

2020 ◽  
Vol 1 (3) ◽  
pp. 92-97
Author(s):  
Hanan Shukur ◽  
Subhi Zeebaree ◽  
Rizgar Zebari ◽  
Omar Ahmed ◽  
Lailan Haji ◽  
...  
Keyword(s):  
Distributed Systems ◽  
Shared Memory ◽  
Cache Coherence ◽  
Distributed Shared Memory ◽  
Data Consistency ◽  
Multiprocessor System ◽  
Cache Coherence Protocols ◽  
Coherence Protocols ◽  
Cache Coherence Protocol ◽  
Shared Memory Multiprocessor

Distributed systems performance is affected significantly by cache coherence protocols due to their role in data consistency maintaining. Also, cache coherent protocols have a great task for keeping the interconnection of caches in a multiprocessor environment. Moreover, the overall performance of distributed shared memory multiprocessor system is influenced by the used cache coherence protocol type. The major challenge of shared memory devices is to maintain the cache coherently. Therefore, in past years many contributions have been presented to address the cache issues and to improve the performance of distributed systems. This paper reviews in a systematic way a number of methods used for the cache-coherent protocols in a distributed system.

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