Nakul Jindal created SYSTEMML-1396:
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Summary: Enable lazily freeing cuda allocated memory chunks
Key: SYSTEMML-1396
URL: https://issues.apache.org/jira/browse/SYSTEMML-1396
Project: SystemML
Issue Type: Improvement
Components: Runtime
Reporter: Nakul Jindal
Assignee: Nakul Jindal
Fix For: SystemML 1.0
The current version of deallocating cuda memory chunks is done lazily. That
came about as a result of the {{cudaFree}} operations being expensive. After
adding extra instrumentation, it was determined that {{cudaAlloc}} operations
were fairly expensive as well.
Most GPU operations are done in loops with constantly allocating and
deallocating the same size of memory chunks per loop. What would be more
efficient is to "clear out" or set the memory to 0 instead.
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