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Posted to dev@mahout.apache.org by "Dmitriy Lyubimov (JIRA)" <ji...@apache.org> on 2015/06/03 01:27:51 UTC
[jira] [Created] (MAHOUT-1724) Optimizations of matrix-matrix
in-core multiplication based on structural flavors
Dmitriy Lyubimov created MAHOUT-1724:
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Summary: Optimizations of matrix-matrix in-core multiplication based on structural flavors
Key: MAHOUT-1724
URL: https://issues.apache.org/jira/browse/MAHOUT-1724
Project: Mahout
Issue Type: Improvement
Reporter: Dmitriy Lyubimov
Assignee: Dmitriy Lyubimov
Fix For: 0.10.2
Current times() operation suffers a lot. Especially when e.g. column-major iterations are done over a matrix backed by row-major sequential sparse vectors, things are dropping orders of magnitude in performance.
This issue finds optimal traversal gemm kernel order for current matrix; or rewrites matrix prior to operation to enable optimal traversals.
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