Matthias Boehm created SYSTEMML-1792:
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Summary: Performance issue sparse-dense matrix multiply
Key: SYSTEMML-1792
URL: https://issues.apache.org/jira/browse/SYSTEMML-1792
Project: SystemML
Issue Type: Bug
Reporter: Matthias Boehm
Our sparse-dense matrix multiply is already cache conscious but used very small
block static block sizes, which were optimized for moderate sparsity. However,
for cases with very sparse matrices (and skinny right hand size matrices), the
small block sizes add substantial overhead of more than an order of magnitude.
This task aims to make these block sizes adaptive, consistent with our
cache-conscious implementations of sparsity exploiting matrix multiply
operators such as wsloss.
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