Xiangrui Meng created SPARK-6685:
------------------------------------
Summary: Use DSYRK to compute AtA in ALS
Key: SPARK-6685
URL: https://issues.apache.org/jira/browse/SPARK-6685
Project: Spark
Issue Type: Improvement
Components: MLlib
Reporter: Xiangrui Meng
Priority: Minor
Now we use DSPR to compute AtA in ALS, which is a Level 2 BLAS routine. We
should switch to DSYRK to use native BLAS to accelerate the computation. The
factors should remain dense vectors. And we can pre-allocate a buffer to stack
vectors and do Level 3.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
