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https://issues.apache.org/jira/browse/KAFKA-8563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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karan kumar updated KAFKA-8563:
-------------------------------
Environment:
Darwin WM-CXXXXXX 18.2.0 Darwin Kernel Version 18.2.0: Thu Dec 20 20:46:53 PST
2018; root:xnu-4903.241.1~1/RELEASE_X86_64 x86_64
ProductName: Mac OS X
ProductVersion: 10.14.3
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
was:
Darwin WM-CXXXXXX 18.2.0 Darwin Kernel Version 18.2.0: Thu Dec 20 20:46:53 PST
2018; root:xnu-4903.241.1~1/RELEASE_X86_64 x86_64
ProductName: Mac OS X
ProductVersion: 10.14.3
> Minor: Remove method call in netoworkSend
> -----------------------------------------
>
> Key: KAFKA-8563
> URL: https://issues.apache.org/jira/browse/KAFKA-8563
> Project: Kafka
> Issue Type: Improvement
> Components: clients
> Affects Versions: 2.4.0
> Environment: Darwin WM-CXXXXXX 18.2.0 Darwin Kernel Version 18.2.0:
> Thu Dec 20 20:46:53 PST 2018; root:xnu-4903.241.1~1/RELEASE_X86_64 x86_64
> ProductName: Mac OS X
> ProductVersion: 10.14.3
> java version "1.8.0_201"
> Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
> Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
> Reporter: karan kumar
> Priority: Minor
>
> There was a
> [https://github.com/apache/kafka/blob/93bf96589471acadfb90e57ebfecbd91f679f77b/clients/src/main/java/org/apache/kafka/common/network/NetworkSend.java#L30]
> which can be removed from the network send class.
>
> Initial JMH benchmarks suggest minimal improvement after removing this method
> call.
>
> Present network send JMH report:
>
> {code:java}
> // code placeholder
> running JMH with args [-f 2 ByteBufferSendBenchmark]
> # JMH version: 1.21
> # VM version: JDK 1.8.0_201, Java HotSpot(TM) 64-Bit Server VM, 25.201-b09
> # VM invoker:
> /Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home/jre/bin/java
> # VM options: <none>
> # Warmup: 5 iterations, 2000 ms each
> # Measurement: 5 iterations, 5000 ms each
> # Timeout: 10 min per iteration
> # Threads: 1 thread, will synchronize iterations
> # Benchmark mode: Throughput, ops/time
> # Benchmark: org.apache.kafka.jmh.common.ByteBufferSendBenchmark.testMethod
> # Run progress: 0.00% complete, ETA 00:01:10
> # Fork: 1 of 2
> # Warmup Iteration 1: 38.961 ops/us
> # Warmup Iteration 2: 66.493 ops/us
> # Warmup Iteration 3: 63.502 ops/us
> # Warmup Iteration 4: 64.205 ops/us
> # Warmup Iteration 5: 63.676 ops/us
> Iteration 1: 63.537 ops/us
> Iteration 2: 63.863 ops/us
> Iteration 3: 58.472 ops/us
> Iteration 4: 62.780 ops/us
> Iteration 5: 63.454 ops/us
> # Run progress: 50.00% complete, ETA 00:00:35
> # Fork: 2 of 2
> # Warmup Iteration 1: 41.128 ops/us
> # Warmup Iteration 2: 66.872 ops/us
> # Warmup Iteration 3: 64.279 ops/us
> # Warmup Iteration 4: 64.307 ops/us
> # Warmup Iteration 5: 64.101 ops/us
> Iteration 1: 64.315 ops/us
> Iteration 2: 64.370 ops/us
> Iteration 3: 64.043 ops/us
> Iteration 4: 60.844 ops/us
> Iteration 5: 62.936 ops/us
> Result "org.apache.kafka.jmh.common.ByteBufferSendBenchmark.testMethod":
> 62.861 ±(99.9%) 2.804 ops/us [Average]
> (min, avg, max) = (58.472, 62.861, 64.370), stdev = 1.854
> CI (99.9%): [60.058, 65.665] (assumes normal distribution)
> # Run complete. Total time: 00:01:10
> REMEMBER: The numbers below are just data. To gain reusable insights, you
> need to follow up on
> why the numbers are the way they are. Use profilers (see -prof, -lprof),
> design factorial
> experiments, perform baseline and negative tests that provide experimental
> control, make sure
> the benchmarking environment is safe on JVM/OS/HW level, ask for reviews from
> the domain experts.
> Do not assume the numbers tell you what you want them to tell.
> Benchmark Mode Cnt Score Error Units
> ByteBufferSendBenchmark.testMethod thrpt 10 62.861 ± 2.804 ops/us
> {code}
> and after removing the method call
>
> {code:java}
> // code placeholder
> running JMH with args [-f 2 ByteBufferSendBenchmark]
> # JMH version: 1.21
> # VM version: JDK 1.8.0_201, Java HotSpot(TM) 64-Bit Server VM, 25.201-b09
> # VM invoker:
> /Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home/jre/bin/java
> # VM options: <none>
> # Warmup: 5 iterations, 2000 ms each
> # Measurement: 5 iterations, 5000 ms each
> # Timeout: 10 min per iteration
> # Threads: 1 thread, will synchronize iterations
> # Benchmark mode: Throughput, ops/time
> # Benchmark: org.apache.kafka.jmh.common.ByteBufferSendBenchmark.testMethod
> # Run progress: 0.00% complete, ETA 00:01:10
> # Fork: 1 of 2
> # Warmup Iteration 1: 40.512 ops/us
> # Warmup Iteration 2: 67.002 ops/us
> # Warmup Iteration 3: 63.399 ops/us
> # Warmup Iteration 4: 63.288 ops/us
> # Warmup Iteration 5: 63.776 ops/us
> Iteration 1: 63.539 ops/us
> Iteration 2: 63.204 ops/us
> Iteration 3: 63.114 ops/us
> Iteration 4: 63.106 ops/us
> Iteration 5: 63.708 ops/us
> # Run progress: 50.00% complete, ETA 00:00:35
> # Fork: 2 of 2
> # Warmup Iteration 1: 40.290 ops/us
> # Warmup Iteration 2: 65.076 ops/us
> # Warmup Iteration 3: 62.961 ops/us
> # Warmup Iteration 4: 63.219 ops/us
> # Warmup Iteration 5: 63.380 ops/us
> Iteration 1: 63.186 ops/us
> Iteration 2: 63.411 ops/us
> Iteration 3: 63.427 ops/us
> Iteration 4: 63.441 ops/us
> Iteration 5: 63.483 ops/us
> Result "org.apache.kafka.jmh.common.ByteBufferSendBenchmark.testMethod":
> 63.362 ±(99.9%) 0.303 ops/us [Average]
> (min, avg, max) = (63.106, 63.362, 63.708), stdev = 0.200
> CI (99.9%): [63.059, 63.665] (assumes normal distribution)
> # Run complete. Total time: 00:01:10
> REMEMBER: The numbers below are just data. To gain reusable insights, you
> need to follow up on
> why the numbers are the way they are. Use profilers (see -prof, -lprof),
> design factorial
> experiments, perform baseline and negative tests that provide experimental
> control, make sure
> the benchmarking environment is safe on JVM/OS/HW level, ask for reviews from
> the domain experts.
> Do not assume the numbers tell you what you want them to tell.
> Benchmark Mode Cnt Score Error Units
> ByteBufferSendBenchmark.testMethod thrpt 10 63.362 ± 0.303 ops/us
> JMH benchmarks done
> {code}
>
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