Checklist for JITServer GA

[mpirvu]

• New functionality
  • Support for new method handles
    • Add JITServer support for new invokedynamic and invokehandle #11933 Add JITServer support for new invokedynamic and invokehandle
    • JITServer support for transforming OpenJDK MethodHandles #12011 JITServer support for transforming OpenJDK MethodHandles
    • Add JITServer support for LambdaForm methods inlining #12525 Add JITServer support for LambdaForm methods inlining
  • Storing AOT methods at JITServer
    • Extend class loader table to support JITServer AOT cache #12154 Extend class loader table to support JITServer AOT cache
    • JITServer AOT cache storage infrastructure #12320 JITServer AOT cache storage infrastructure
    • JITServer AOT cache deserializer #12405 JITServer AOT cache deserializer
    • Serializing and caching AOT methods during AOT compilations at the JITServer
    • Serving cached AOT methods at the JITServer and deserializing and loading them at the JIT client
  • Optional: Support for JProfiling Design: Enable JProfiling for JITServer #9974
    • Add helper class for serialization of simple types eclipse/omr#5201 Support for serialization of data structures
    • Support for serialization of TR_BlockFrequencyInfo #9590 Serialization of block frequency data structures
    • Add new relocation records for block frequency #9591 Add new relocation records for data structures to support AOT compilation of profiled code
    • Create relocation records of type TR_BlockFrequency and TR_RecompQueuedFlag eclipse/omr#5202 Changes to create new relocation records
    • Enable block frequency profiling in JITServer #11625 Enable block frequency profiling in JITServer
• Performance
  • Improve memory utilization at JITServer
    • Use per-client persistent allocators on JITServer #11686 Use per-client persistent allocators on JITServer
    • Create smaller code and data caches on JITServer #11865 Create smaller code and data caches on JITServer
    • Store a single copy of each distinct ROMClass at JITServer #11777 Store a single copy of each distinct ROMClass at JITServer
    • Improve JITServer client compilation thread activation policy #11628 Improve JITServer client compilation thread activation policy
    • Prevent expensive compilations from exhausting available memory at JITServer #12626 Prevent expensive compilations from exhausting available memory at JITServer
    • Investigate possible memory leak at JITServer #12659 Investigate possible memory leak at JITServer
  • Improve JITServer scalability
    • Do not hold compilation monitor in postCompilationTasks on the server #11844 Do not hold compilation monitor in postCompilationTasks on the server
    • Prevent expensive compilations from exhausting available memory at JITServer #12626 Sending Client feedback about number of active compilations threads
  • Support for scaling down to 0. Support for scaling JITServer down to 0 #12375
• RAS
  • Make JITServer heart-beat more useful
    • Update the values of JVM Cpu in the compilation msgs in server's verbose #12033 Update the values of JVM Cpu in the compilation msgs in server's verbose
    • Add timestamps to information printed by JITServer heart beat #12658 Add timestamps to information printed by JITServer heart beat
  • JITDump support
    • Re-enable JIT helpers on JITServer #12386 Re-enable JIT helpers on JITServer
    • Enable JitDump support on JITServer #12439 Enable JitDump support on JITServer
  • Snap file support
    • Make sure Snap file are useful
    • Add new trace points for rare paths that may create problems
  • Add MethodMetaData flag indicating remote compilation #12921 Add MethodMetaData flag indicating remote compilation
  • Add an option to log JITServer connection events #13055
• Cleanup existing issues
  • Assertion Failure on JITServer in PersistentAllocator.cpp #12701
  • JDK11 JIT Server : MathLoadTest_all_special_12_FAILED net.adoptopenjdk.test.bigdecimal.TestSuite034 #10331
  • JDK11 JIT Server StreamBuilderTest.java - Segmentation error vmState=0x00000000 at libj9jit29.so #11185
  • JDK8 testServerComesUpAfterClient - Expected an exit value of 0 or 143, got 1 instead #10920
  • testJITServer_1 testServerGoesDown IllegalThreadStateException: process hasn't exited #8770
  • Crash when running JITaaS with SSL #4382 Crash when running JITaaS with SSL
• Documentation
  • Provide recommendations when to use JITServer
  • Update documentation on how to debug it
  • Describe heart-beat and information in vlogs
  • Document JITServer specific options like -Xjit:enableJITServerHeuristics, how to enable ROMClass sharing, etc.
  • Write blog about performance in OpenShift