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https://issues.apache.org/jira/browse/HADOOP-13782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15649245#comment-15649245
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Hadoop QA commented on HADOOP-13782:
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
16s{color} | {color:blue} Docker mode activated. {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:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m
0s{color} | {color:green} The patch appears to include 1 new or modified test
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
41s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 10m
49s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
34s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
7s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
22s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
30s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
53s{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
36s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 9m
18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 9m
18s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}
0m 33s{color} | {color:orange} hadoop-common-project/hadoop-common: The patch
generated 2 new + 21 unchanged - 2 fixed = 23 total (was 23) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 1m
4s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
22s{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} findbugs {color} | {color:green} 1m
37s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m
52s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 8m
3s{color} | {color:green} hadoop-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
40s{color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 47m 30s{color} |
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|| Subsystem || Report/Notes ||
| Docker | Image:yetus/hadoop:e809691 |
| JIRA Issue | HADOOP-13782 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12838071/HADOOP-13782.006.patch
|
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit findbugs checkstyle |
| uname | Linux f440f8122d25 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed
Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh
|
| git revision | trunk / 29e3b34 |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| checkstyle |
https://builds.apache.org/job/PreCommit-HADOOP-Build/11034/artifact/patchprocess/diff-checkstyle-hadoop-common-project_hadoop-common.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HADOOP-Build/11034/testReport/ |
| modules | C: hadoop-common-project/hadoop-common U:
hadoop-common-project/hadoop-common |
| Console output |
https://builds.apache.org/job/PreCommit-HADOOP-Build/11034/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT http://yetus.apache.org |
This message was automatically generated.
> Make MutableRates metrics thread-local write, aggregate-on-read
> ---------------------------------------------------------------
>
> Key: HADOOP-13782
> URL: https://issues.apache.org/jira/browse/HADOOP-13782
> Project: Hadoop Common
> Issue Type: Improvement
> Components: metrics
> Reporter: Erik Krogen
> Assignee: Erik Krogen
> Attachments: HADOOP-13782.000.patch, HADOOP-13782.001.patch,
> HADOOP-13782.002.patch, HADOOP-13782.003.patch, HADOOP-13782.004.patch,
> HADOOP-13782.005.patch, HADOOP-13782.006.patch
>
>
> Currently the {{MutableRates}} metrics class serializes all writes to metrics
> it contains because of its use of {{MetricsRegistry.add()}} (i.e., even two
> increments of unrelated metrics contained within the same {{MutableRates}}
> object will serialize w.r.t. each other). This class is used by
> {{RpcDetailedMetrics}}, which may have many hundreds of threads contending to
> modify these metrics. Instead we should allow updates to unrelated metrics
> objects to happen concurrently. To do so we can let each thread locally
> collect metrics, and on a {{snapshot}}, aggregate the metrics from all of the
> threads.
> I have collected some benchmark performance numbers in HADOOP-13747
> (https://issues.apache.org/jira/secure/attachment/12835043/benchmark_results)
> which indicate that this can bring significantly higher performance in high
> contention situations.
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