Paging tradeoffs in distributed-shared-memory multiprocessors
- Univ. of Wisconsin, Madison, WI (United States). Computer Sciences Dept.
Massively parallel processors have begun using commodity operating systems that support demand-paged virtual memory. To evaluate the utility of virtual memory, the authors measured the behavior of seven shared memory parallel application programs on a simulated distributed-shared-memory machine. The results (1) confirm the importance of gang CPU scheduling, (2) show that a page-faulting processor should spin rather than invoke a parallel context switch, (3) show that the parallel programs frequently touch most of their data, and (4) indicate that memory, not just CPUs, must be ``gang scheduled``. Overall, the experiments demonstrate that demand paging has limited value on current parallel machines because of the applications` synchronization and memory reference patterns and the machines` high page-fault and parallel-context-switch overheads.
- DOE Contract Number:
- FG02-93ER25176
- OSTI ID:
- 87659
- Report Number(s):
- CONF-941118--; ISBN 0-8186-6605-6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Memory access in shared virtual memory
Memory access in shared virtual memory