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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10180) Loop optimization for SIMD in ColumnArithmeticColumn.txt
Date Tue, 07 Apr 2015 20:18:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483971#comment-14483971
] 

Hive QA commented on HIVE-10180:
--------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12723562/HIVE-10180.2.patch

{color:red}ERROR:{color} -1 due to 2 failed/errored test(s), 8699 tests executed
*Failed tests:*
{noformat}
TestMinimrCliDriver-smb_mapjoin_8.q - did not produce a TEST-*.xml file
org.apache.hive.hcatalog.hbase.TestPigHBaseStorageHandler.org.apache.hive.hcatalog.hbase.TestPigHBaseStorageHandler
{noformat}

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/3312/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/3312/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-3312/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 2 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12723562 - PreCommit-HIVE-TRUNK-Build

> Loop optimization for SIMD in ColumnArithmeticColumn.txt
> --------------------------------------------------------
>
>                 Key: HIVE-10180
>                 URL: https://issues.apache.org/jira/browse/HIVE-10180
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Chengxiang Li
>            Assignee: Chengxiang Li
>            Priority: Minor
>         Attachments: HIVE-10180.1.patch, HIVE-10180.2.patch
>
>
> JVM is quite strict on the code schema which may executed with SIMD instructions, take
a loop in DoubleColAddDoubleColumn.java for example, 
> {code:java}
> for (int i = 0; i != n; i++) {
>   outputVector[i] = vector1[0] + vector2[i];
> }
> {code}
> The "vector1[0]" reference would prevent JVM to execute this part of code with vectorized
instructions, we need to assign the "vector1[0]" to a variable outside of loop, and use that
variable in loop.



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