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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYSTEMML-1882) Perftest: Kmeans shows different behavior compared to previous releases
Date Sat, 02 Sep 2017 06:34:00 GMT
Matthias Boehm created SYSTEMML-1882:
----------------------------------------

             Summary: Perftest: Kmeans shows different behavior compared to previous releases
                 Key: SYSTEMML-1882
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1882
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm


The current SystemML master shows different convergence behavior on the perftest Kmeans scenarios.
Triggered by significantly increased execution times, a comparison with 0.14 showed the following
output (note the different number of iterations):

With SystemML 0.14
{code}
Run 1, Iteration 1:  Terminated with code = 3,  Centroid WCSS = 1.1884874830960146E11
Run 3, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 2, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 7, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 6, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 9, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 8, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 4, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 5, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
Run 10, Iteration 2:  Terminated with code = 1,  Centroid WCSS = 1.1836165397662901E11
{code}

With SystemML master:
{code}
Run 8, Iteration 12:  Terminated with code = 1,  Centroid WCSS = 1.0897515693466766E11
Run 4, Iteration 14:  Terminated with code = 1,  Centroid WCSS = 1.0900183622869571E11
Run 1, Iteration 15:  Terminated with code = 1,  Centroid WCSS = 1.0892913262046584E11
Run 2, Iteration 16:  Terminated with code = 1,  Centroid WCSS = 1.0893145533814377E11
Run 6, Iteration 17:  Terminated with code = 1,  Centroid WCSS = 1.0881596327984634E11
Run 3, Iteration 17:  Terminated with code = 1,  Centroid WCSS = 1.0910103829718127E11
Run 7, Iteration 20:  Terminated with code = 1,  Centroid WCSS = 1.089467832141638E11
Run 10, Iteration 20:  Terminated with code = 2,  Centroid WCSS = 1.0873719552339151E11
Run 5, Iteration 20:  Terminated with code = 2,  Centroid WCSS = 1.0891758743999176E11
Run 9, Iteration 20:  Terminated with code = 2,  Centroid WCSS = 1.089222095610236E11
{code}



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