| From | Andi Kleen <> | Subject | Re: [RFC 00/48] perf tools: Introduce data type profiling (v1) | Date | Mon, 23 Oct 2023 14:58:08 -0700 |
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Namhyung Kim <namhyung@kernel.org> writes:
> Hello, > > I'm happy to share my work on data type profiling. This is to associate > PMU samples to data types they refer using DWARF debug information. So > basically it depends on quality of PMU events and compiler for producing > DWARF info. But it doesn't require any changes in the target program. > > As it's an early stage, I've targeted the kernel on x86 to reduce the > amount of work but IIUC there's no fundamental blocker to apply it to > other architectures and applications.
FWIW i posted a similar patchkit a long time ago
https://lore.kernel.org/lkml/20171128002321.2878-13-andi@firstfloor.org/
It was on my list to resurrect that, it's great that you are doing something similar.
The latest iteration (not posted) was here:
https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git/log/?h=perf/var-resolve-7
The main difference seems to be that mine was more for perf script (e.g. i supported PT decoding), while you are more focused on sampling. I relied on the kprobes/uprobes engine, which unfortunately was always quite slow and had many limitations.
Perhaps it would be possible merge the useful parts of the two approaches?
-Andi
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