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...he jitdump format [1] of perf? It enables perf report to also "zoom in" and annotate the JIT compiled code on assembly level with runtime percentage. It helps a lot to understand which parts of the generated code is the bottleneck. I recently did a proof-of-concept for the JIT assembler asmjit [2]. It just dumps the generated code in the right format and mmaps the file to let perf record know about it. perf report picks it up automatically. So, is there any profiling support for JIT compiled code? Best regards, Frank [1] https://raw.githubusercontent.com/torvalds/linux/master/tools/p...

...les perf report to also "zoom in" and annotate the JIT compiled > > code on assembly level with runtime percentage. It helps a lot to > > understand which parts of the generated code is the bottleneck. > > > > I recently did a proof-of-concept for the JIT assembler asmjit [2]. It > > just dumps the generated code in the right format and mmaps the file > > to let perf record know about it. perf report picks it up > > automatically. > > > > So, is there any profiling support for JIT compiled code? > > > I guess that's a no. &...

Hi, On 2020-03-09 21:20:44 +0100, Frank Tetzel via llvm-dev wrote: > I think, debugging and profiling support is very important for a JIT > engine. I could never get it to work with older LLVM versions. Is there > example code somewhere available? Since I added the perf listener I probably can help you with that. What exactly was the problem you were hitting? I don't have isolated

Hi all, I open sourced a small project of mine recently. It is an EDSL for C++ which makes just-in-time compilation much easier to write and maintain. One of its backends is LLVM's OrcJIT (LLVM 7, still). https://github.com/tetzank/coat Here is a blog post of mine introducing the concept: https://tetzank.github.io/posts/coat-edsl-for-codegen/ You can see it as an abstraction layer on top