You are viewing a plain text version of this content. The canonical link for it is here.
Posted to common-issues@hadoop.apache.org by "Andrew Wang (JIRA)" <ji...@apache.org> on 2016/09/14 20:56:20 UTC
[jira] [Created] (HADOOP-13615) Convert uses of AtomicLong for
counter metrics to LongAdder
Andrew Wang created HADOOP-13615:
------------------------------------
Summary: Convert uses of AtomicLong for counter metrics to LongAdder
Key: HADOOP-13615
URL: https://issues.apache.org/jira/browse/HADOOP-13615
Project: Hadoop Common
Issue Type: Improvement
Components: metrics
Affects Versions: 3.0.0-alpha1
Reporter: Andrew Wang
LongAdder (available in JDK8) can provide much better performance than AtomicLong since it uses thread locals under the hood.
We should consider switching over our uses of AtomicLong and friends over to LongAdder.
If we want to target for JDK7, we can also pull in the implementation since it's pure Java (public domain):
http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/jsr166e/LongAdder.java?view=co
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org