[jira] [Commented] (SPARK-17134) Use level 2 BLAS operations in LogisticAggregator

["Yanbo Liang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-17134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15427529#comment-15427529 ] 

Yanbo Liang commented on SPARK-17134:
-------------------------------------

This is interesting. We also trying to use BLAS to accelerate linear algebra operations in other algorithms such as {{KMeans/ALS}} and I have some basic performance test result. I would like to contribute to this task. Thanks!

> Use level 2 BLAS operations in LogisticAggregator
> -------------------------------------------------
>
>                 Key: SPARK-17134
>                 URL: https://issues.apache.org/jira/browse/SPARK-17134
>             Project: Spark
>          Issue Type: Sub-task
>          Components: ML
>            Reporter: Seth Hendrickson
>
> Multinomial logistic regression uses LogisticAggregator class for gradient updates. We should look into refactoring MLOR to use level 2 BLAS operations for the updates. Performance testing should be done to show improvements.



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