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retronym avatar retronym commented on June 14, 2024

Do'h, I meant to use 0.1.14, not 0.1.4.

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ktoso avatar ktoso commented on June 14, 2024

😄 Yup, you want 0.1.14 :-)

// Thanks for the nice report though, if it was a bug that would have been very helpful :-)

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retronym avatar retronym commented on June 14, 2024

I blame my fat-fingered-ness on the circles I'm circling trying to plug https://github.com/biboudis/jmh-profilers into my profiles.

Using the pre-built binary as instructed in the README, I'm unable to get past the "Please unlock commercial features" nag, even though I passed -XX:+UnlockCommercialFeatures to the SBT jvm and to the sbt-jmh jvmArgs.

I rebuilt that locally, but then needed to update it some API changes in JMH. But then the generated code still fails to compile with:

[error] }
[info] Benchmark entry {'scala.tools.nsc.JavacBenchmark.bench', Throughput, {}} already exists, overwriting
[error] (jmh:compile) javac returned nonzero exit code

But the javac error messages are swallowed.

So I'm building sbt-jmh locally to see if I can get those displayed...

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ktoso avatar ktoso commented on June 14, 2024

JMH itself forks JVMs, that's probably the problem - not sure if we're properly passing jvm options to those - probably not. I can look into these things a bit later today, need to look at conductr things now. Let me know if you find anything more so I can continue from where you get to in my evening perhaps.

(Reopened and renamed, I hope the title makes sense :-))

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retronym avatar retronym commented on June 14, 2024

At the top of my problem stack, I think the problem with jmh:compile failing when the jmh-profilers plugin is on the classpath is related to duplicate classes being created.

I set a breakpoint in the spot in SBT where javac is called, and then reconstructed the command line:

// args.txt
-d
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes
-classpath
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes:/Users/jason/.ivy2/cache/org.scala-lang/scala-compiler/jars/scala-compiler-2.11.6.jar:/Users/jason/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.6.jar:/Users/jason/.ivy2/cache/org.scala-lang/scala-reflect/jars/scala-reflect-2.11.6.jar:/Users/jason/.ivy2/cache/org.scala-lang.modules/scala-xml_2.11/bundles/scala-xml_2.11-1.0.3.jar:/Users/jason/.ivy2/cache/org.scala-lang.modules/scala-parser-combinators_2.11/bundles/scala-parser-combinators_2.11-1.0.3.jar:/Users/jason/.ivy2/cache/org.openjdk.jmh/jmh-core/jars/jmh-core-1.8.jar:/Users/jason/.ivy2/cache/net.sf.jopt-simple/jopt-simple/jars/jopt-simple-4.6.jar:/Users/jason/.ivy2/cache/org.apache.commons/commons-math3/jars/commons-math3-3.2.jar:/Users/jason/.ivy2/cache/org.openjdk.jmh/jmh-generator-bytecode/jars/jmh-generator-bytecode-1.8.jar:/Users/jason/.ivy2/cache/org.openjdk.jmh/jmh-generator-reflection/jars/jmh-generator-reflection-1.8.jar:/Users/jason/.ivy2/cache/org.openjdk.jmh/jmh-generator-asm/jars/jmh-generator-asm-1.8.jar:/Users/jason/.ivy2/cache/org.ow2.asm/asm/jars/asm-5.0.3.jar:/Users/jason/.m2/repository/com/github/biboudis/jmh-profilers/0.1.3-SNAPSHOT/jmh-profilers-0.1.3-SNAPSHOT.jar:/Users/jason/.ivy2/cache/org.openjdk.jmh/jmh-generator-annprocess/jars/jmh-generator-annprocess-1.8.jar:/Users/jason/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.6.jar
/Users/jason/code/scala-jmh-suite/src/main/scala/scala/tools/nsc/JavacBenchmark.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/infra/generated/Blackhole_jmh.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/infra/generated/Blackhole_jmh_B1.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/infra/generated/Blackhole_jmh_B2.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/infra/generated/Blackhole_jmh_B3.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/samples/generated/JMHSample_01_HelloWorld_jmh.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/samples/generated/JMHSample_01_HelloWorld_jmh_B1.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/samples/generated/JMHSample_01_HelloWorld_jmh_B2.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/samples/generated/JMHSample_01_HelloWorld_jmh_B3.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/org/openjdk/jmh/samples/generated/JMHSample_01_HelloWorld_wellHelloThere.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/CompilerBenchmark_compile.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/CompilerBenchmark_jmh.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/CompilerBenchmark_jmh_B1.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/CompilerBenchmark_jmh_B2.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/CompilerBenchmark_jmh_B3.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/JavacBenchmark_bench.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/JavacBenchmark_jmh.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/JavacBenchmark_jmh_B1.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/JavacBenchmark_jmh_B2.java
/Users/jason/code/scala-jmh-suite/target/scala-2.11/generated-sources/jmh/scala/tools/nsc/generated/JavacBenchmark_jmh_B3.java

javac @args.txt
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/org/openjdk/jmh/infra/generated/Blackhole_jmh_B1.java:3: error: duplicate class: org.openjdk.jmh.infra.generated.Blackhole_jmh_B1
public class Blackhole_jmh_B1 extends org.openjdk.jmh.infra.Blackhole {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/org/openjdk/jmh/infra/generated/Blackhole_jmh_B2.java:3: error: duplicate class: org.openjdk.jmh.infra.generated.Blackhole_jmh_B2
public class Blackhole_jmh_B2 extends Blackhole_jmh_B1 {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/org/openjdk/jmh/infra/generated/Blackhole_jmh_B3.java:2: error: duplicate class: org.openjdk.jmh.infra.generated.Blackhole_jmh_B3
public class Blackhole_jmh_B3 extends Blackhole_jmh_B2 {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/org/openjdk/jmh/infra/generated/Blackhole_jmh.java:2: error: duplicate class: org.openjdk.jmh.infra.generated.Blackhole_jmh
public class Blackhole_jmh extends Blackhole_jmh_B3 {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/scala/tools/nsc/generated/JavacBenchmark_jmh_B1.java:3: error: duplicate class: scala.tools.nsc.generated.JavacBenchmark_jmh_B1
public class JavacBenchmark_jmh_B1 extends scala.tools.nsc.JavacBenchmark {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/scala/tools/nsc/generated/JavacBenchmark_jmh_B2.java:3: error: duplicate class: scala.tools.nsc.generated.JavacBenchmark_jmh_B2
public class JavacBenchmark_jmh_B2 extends JavacBenchmark_jmh_B1 {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/scala/tools/nsc/generated/JavacBenchmark_jmh_B3.java:2: error: duplicate class: scala.tools.nsc.generated.JavacBenchmark_jmh_B3
public class JavacBenchmark_jmh_B3 extends JavacBenchmark_jmh_B2 {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/scala/tools/nsc/generated/JavacBenchmark_jmh.java:2: error: duplicate class: scala.tools.nsc.generated.JavacBenchmark_jmh
public class JavacBenchmark_jmh extends JavacBenchmark_jmh_B3 {
       ^
/Users/jason/code/scala-jmh-suite/target/scala-2.11/classes/scala/tools/nsc/generated/JavacBenchmark_bench.java:34: error: duplicate class: scala.tools.nsc.generated.JavacBenchmark_bench
public final class JavacBenchmark_bench {
             ^
Note: Benchmark entry {'scala.tools.nsc.JavacBenchmark.bench', Throughput, {}} already exists, overwriting
9 errors

Removing /Users/jason/.ivy2/cache/org.openjdk.jmh/jmh-generator-annprocess/jars/jmh-generator-annprocess-1.8.jar from the classpath corrects this error.

sbt-jmh could guard against this mistake by adding the compiler option -proc:none (http://stackoverflow.com/questions/882295/maven-compilation-error-duplicate-classes)

I was able to workaround this with:

libraryDependencies += "com.github.biboudis" % "jmh-profilers" % "0.1.3-SNAPSHOT" intransitive()

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retronym avatar retronym commented on June 14, 2024

I was then able to gather the profiling data with:

 run -jvmArgsPrepend -XX:+UnlockCommercialFeatures -i 1 -wi 1 -prof jfr

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ktoso avatar ktoso commented on June 14, 2024

Awesome detective work, thanks a lot @retronym! I'll incorporate those hints and spin a release soon :-)

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retronym avatar retronym commented on June 14, 2024

I still can't get this working with the binary release of jmh-profilers. There seems to be a forked VM running its code without -XX:+UnlockCommercialFeatures. About to add some diagnostics to a locally built copy to find that..

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retronym avatar retronym commented on June 14, 2024

> set javaOptions in run += "-XX:+UnlockCommercialFeatures" does the trick.

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retronym avatar retronym commented on June 14, 2024

See: biboudis/jmh-profilers#4 for the last problem on the stack 😄

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ktoso avatar ktoso commented on June 14, 2024

Great to see that project is active :-)

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