[
https://issues.apache.org/jira/browse/TEZ-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14960786#comment-14960786
]
Karam Singh edited comment on TEZ-2849 at 10/16/15 2:29 PM:
------------------------------------------------------------
Again terasort against GB data
with OracleJDK8 (After restarting cluster for OracleJDK8 and setting the same
in hadoop-env.sh): java version "1.8.0_45"
Also ran terasort against OracleJDK7 (After restarting cluster for OracleJDK7
and setting the same in hadoop-env.sh):
java version "1.7.0_67"
Java(TM) SE Runtime Environment (build 1.7.0_67-b01)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)
AND against OpenJDK7 (After restarting cluster for OpenJDK8 and setting the
same in hadoop-env.sh):
java version "1.7.0_85"
OpenJDK Runtime Environment (rhel-2.6.1.2.el7_1-x86_64 u85-b01)
OpenJDK 64-Bit Server VM (build 24.85-b03, mixed mode)
All terasort application ran successfully . I ran all application after
applying patch on master branch
was (Author: karams):
Again terasort against GB data
with OracleJDK8 (After restarting cluster for OracleJDK8 and setting the same
in hadoop-env.sh): java version "1.8.0_45"
Also ran terasort against OracleJDK7 (After restarting cluster for OracleJDK7
and setting the same in hadoop-env.sh):
java version "1.7.0_67"
Java(TM) SE Runtime Environment (build 1.7.0_67-b01)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)
AND against OpenJDK7 (After restarting cluster for OpenJDK8 and setting the
same in hadoop-env.sh):
java version "1.7.0_85"
OpenJDK Runtime Environment (rhel-2.6.1.2.el7_1-x86_64 u85-b01)
OpenJDK 64-Bit Server VM (build 24.85-b03, mixed mode)
All terasort application ran sucessfully . I ran all application after applying
patch on master bracnh
> Implement Specific Workaround for JDK-8026049 & JDK-8073093
> ------------------------------------------------------------
>
> Key: TEZ-2849
> URL: https://issues.apache.org/jira/browse/TEZ-2849
> Project: Apache Tez
> Issue Type: Sub-task
> Affects Versions: 0.8.1-alpha
> Reporter: Gopal V
> Assignee: Gopal V
> Attachments: TEZ-2849.1.patch, TEZ-2849.2.patch
>
>
> The CPU performance overhead of the sort operation is tied to the JIT
> handling of the aliased byte buffers without an explicit alignment (i.e a
> byte[] buffer referenced as an IntBuffer).
> https://bugs.openjdk.java.net/browse/JDK-8026049
> +
> https://bugs.openjdk.java.net/browse/JDK-8073093
> Workaround that JIT limitation while keeping in mind the modern CPU
> micro-code optimizations around alignment.
> http://lemire.me/blog/archives/2012/05/31/data-alignment-for-speed-myth-or-reality/
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
