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Add a script to translate jitted function names in flamegraph (#2906)

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liang.he
2023-12-21 10:57:58 +08:00
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doc/perf_tune.md
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@ -134,7 +134,7 @@ $ perf report --input=perf.data
>
> For example, with EMCC, you can add `-g2`.
>
> If not able to get the context of the custom name section, WAMR will use `aot_func#N` to represent the function name. `N` is from 0. `aot_func#0` represents the first *not imported wasm function*.
> If not able to get the context of the custom name section, WAMR will use `aot_func#N` to represent the function name. `N` is from 0. `aot_func#0` represents the first _not imported wasm function_.
### 7.1 Flamegraph
@ -177,3 +177,16 @@ $ ./FlameGraph/flamegraph.pl out.folded > perf.foo.wasm.svg
> # only jitted functions
> $ grep "wasm_runtime_invoke_native" out.folded | ./FlameGraph/flamegraph.pl > perf.foo.wasm.only.svg
> ```
> [!TIP]
> use [trans_wasm_func_name.py](../test-tools/trans-jitted-func-name/trans_wasm_func_name.py) to translate jitted function
> names to its original wasm function names. It requires _wasm-objdump_ in _wabt_ and _name section_ in the .wasm file
>
> The input file is the output of `./FlameGraph/stackcollapse-perf.pl`.
>
> ```bash
> python trans_wasm_func_name.py --wabt_home <wabt-installation> --folded out.folded <.wasm>
> ```
>
> Then you will see a new file named _out.folded.translated_ which contains the translated folded stacks.
> All wasm functions are translated to its original names with a prefix like "[Wasm]"