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41 строка
1.1 KiB
Plaintext
41 строка
1.1 KiB
Plaintext
https://github.com/AdoptOpenJDK/jitwatch/wiki
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https://jakubstransky.com/2018/02/03/jvm-code-friendly-to-jit-optimisation/
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To generate the hotspot.log file used by JITWatch run your program with the following JVM switches.
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-XX:+TraceClassLoading
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-XX:-TieredCompilation // to turn off the tiered compil-n
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-XX:+PrintInlining
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-XX:+PrintCompilation
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-XX:+PrintAssembly
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-XX:+LogCompilation // combines PrintCompilation and PrintInlining in one horrible xml (LogCompilation - for CLI, JITWatch - for GUI)
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-XX:+UnlockDiagnosticVMOptions
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-XX:+PrintInlining
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-XX:+PrintAssembly
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-Xbatch // ???
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2> /dev/null
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out:
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ms batch-id flags
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flags
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! - ex-hanling
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% - never-ending loop
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The hotspot.log file is generated in the program execution directory.
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https://gist.github.com/chrisvest/2932907
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https://wikis.oracle.com/display/HotSpotInternals/PrintAssembly
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Performance Techniques:
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https://wiki.openjdk.java.net/display/HotSpot/PerformanceTechniques
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Options:
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http://www.oracle.com/technetwork/articles/java/vmoptions-jsp-140102.html
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qa
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https://stackoverflow.com/questions/1503479/how-to-see-jit-compiled-code-in-jvm
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