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https://issues.apache.org/jira/browse/MAPREDUCE-7223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16885243#comment-16885243
]
Hadoop QA commented on MAPREDUCE-7223:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
28s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m
0s{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m
0s{color} | {color:red} 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} |
|| || || || {color:brown} trunk Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 24m
39s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
31s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
25s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
39s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
10m 56s{color} | {color:green} branch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m
57s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
20s{color} | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
35s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m
30s{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javac {color} | {color:red} 0m 30s{color}
| {color:red}
hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-core
generated 10 new + 153 unchanged - 0 fixed = 163 total (was 153) {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}
0m 19s{color} | {color:orange}
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core:
The patch generated 42 new + 226 unchanged - 0 fixed = 268 total (was 226)
{color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m
31s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s{color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green}
12m 2s{color} | {color:green} patch has no errors when building and testing
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
5s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
16s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 5m
0s{color} | {color:green} hadoop-mapreduce-client-core in the patch passed.
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
26s{color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 59m 37s{color} |
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=18.09.7 Server=18.09.7 Image:yetus/hadoop:bdbca0e |
| JIRA Issue | MAPREDUCE-7223 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12974729/MAPREDUCE-7223-003.patch
|
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient findbugs checkstyle |
| uname | Linux 7d813fb94f70 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2
17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | trunk / 5446308 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_212 |
| findbugs | v3.1.0-RC1 |
| javac |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7629/artifact/out/diff-compile-javac-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-core.txt
|
| checkstyle |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7629/artifact/out/diff-checkstyle-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-core.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7629/testReport/ |
| Max. process+thread count | 1583 (vs. ulimit of 10000) |
| modules | C:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core
U:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core |
| Console output |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/7629/console |
| Powered by | Apache Yetus 0.8.0 http://yetus.apache.org |
This message was automatically generated.
> Quicksort GetInt performance Issue in Terasort
> ----------------------------------------------
>
> Key: MAPREDUCE-7223
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7223
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: task
> Affects Versions: 2.7.6, 3.1.2
> Reporter: WuZeyi
> Priority: Major
> Labels: ByteBuffer, Quick-sort, Terasort, performance, unsafe
> Attachments: MAPREDUCE-7223-001.patch, MAPREDUCE-7223-002.patch,
> MAPREDUCE-7223-003.patch, makeint.png, terasort.png
>
>
> I find a hot spot of 'java.nio.Bits.getIntL' in the Terasort case of Hadoop.
> It is done by shifting four bytes in the byte array each time to get an int.
> This 'getIntL' operation is repeatedly called in the quick-sort of KVbuffer
> which has a complexity of NlogN, and it causes the hot spot.
> The element that is gotten in the quick-sort may be gotten frequently, which
> means it has to be shifted again and again.
> After replacing 'java.nio.Bits.getIntL' with 'unsafe.getInt', the
> performance of quick-sort can be improved by 30%。Terasort can be improved by
> 10%
> !terasort.png!
> !makeint.png!
> Quick-sort performance: The time of quick-sort using unsafe is 16515s,and
> using byteBuffer is 21643s.
> unsafe(s) byteBuffer(s) byteBuffer/unsafe
> AVG 16515 21643 1.310481735
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