Where is `IttnotifyInfo` defined/declared? about ittapi HOT 3 OPEN

@iamkroot, we use iJitIttNotifyInfo functionality only for testing purposes in the llvm-jitlistener tool.

To create an Intel JIT event listener for the llvm-jitlistener we provide it with the IttnotifyInfo function
in llvm/tools/llvm-jitlistener/llvm-jitlistener.cpp

Could you please describe how you would you like to use these listeners?
Theoretically, we could link the functionality of this LLVM listener with __itt_module_load_with_sections and __itt_module_unload_with_sections ITT APIs

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Could you please describe how you would you like to use these listeners?

I have a JIT-ted program running through LLVM's MCJIT ExecutionEngine. I want to profile this using VTune (great software!), but my code is heavily inlined.

From reading the LLVM PR, I assumed that this was something that we could handle out-of-the-box using IntelJITEventListener. But as you mentioned, the iJitIttNotifyInfo is only used for debugging/dumping the ELF and is not calling anything on the VTune/ittnotify side in the default listener.

Theoretically, we could link the functionality of this LLVM listener with __itt_module_load_with_sections and __itt_module_unload_with_sections ITT APIs

Would that handle inlined functions? I also see iJVM_EVENT_TYPE_METHOD_INLINE_LOAD_FINISHED inside jitprofiling.c, and was planning to use that instead.

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I have a JIT-ted program running through LLVM's MCJIT ExecutionEngine. I want to profile this using VTune (great software!), but my code is heavily inlined.

Well, since your JIT-ted program running through LLVM's MCJIT ExecutionEngine you just need to make sure that it was compiled with DLLVM_USE_INTEL_JITEVENTS=ON option. LLVM's MCJIT already has VTune profiling support and you do not need to make changes in LLVM project.

From reading the LLVM PR, I assumed that this was something that we could handle out-of-the-box using IntelJITEventListener. But as you mentioned, the iJitIttNotifyInfo is only used for debugging/dumping the ELF and is not calling anything on the VTune/ittnotify side in the default listener.

MCJIT already instrumented with ITT API __itt_module_load_with_sections which dumps ELF file and provides VTune with all the necessary information during profiling.
In this case inlines are not a problem :)
And you do not need the iJitIttNotifyInfo functionality, we have it only for testing purposes in the llvm-jitlistener tool.

Also I would like to note, that in case of VTune attach to a launched application, we recommend to manually set INTEL_LIBITTNOTIFY64 (and INTEL_LIBITTNOTIFY32 for 32 bit) environment variable before launching the application.

@iamkroot sorry for the delayed reply, I was on a vacation.

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