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https://issues.apache.org/jira/browse/HADOOP-10752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14354407#comment-14354407
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Hadoop QA commented on HADOOP-10752:
------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12652581/jira-10752.patch
against trunk revision 7711049.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:red}-1 tests included{color}. The patch doesn't appear to include
any new or modified tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/5905//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/5905//console
This message is automatically generated.
> Add support for hardware crc on ARM aarch64 architecture
> --------------------------------------------------------
>
> Key: HADOOP-10752
> URL: https://issues.apache.org/jira/browse/HADOOP-10752
> Project: Hadoop Common
> Issue Type: Improvement
> Components: native, performance
> Affects Versions: trunk-win
> Environment: ARM aarch64 Juno development platform
> Reporter: Edward Nevill
> Priority: Minor
> Labels: performance
> Attachments: jira-10752.patch
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> This patch adds support for hardware crc for ARM's new 64 bit architecture.
> The patch is completely conditionalized on __arch64__
> For the moment I have only done the non pipelined version as the hw I have
> only has 1 crc execute unit.
> Some initial benchmarks on terasort give
> sw crc: 107 sec
> hw crc: 103 sec
> The performance improvement is quite small, but this is limited by the fact
> that I am using early stage hw which is not performant.
> I have also built it on x86 and I think the change is fairly safe for other
> architectures because post conditionalization the src is identical on other
> architectures.
> This is the first patch I have submitted for Hadoop so I would welcome any
> feedback and help.
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