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Add note for perf issue #2252

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Feb 14, 2025
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Add note for perf issue #2252

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7 changes: 7 additions & 0 deletions src/profiling/with_perf.md
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Expand Up @@ -52,6 +52,13 @@ you made in the beginning. But there are some things to be aware of:
- You probably don't want incremental messing about with your
profile. So something like `CARGO_INCREMENTAL=0` can be helpful.

In case to avoid the issue of `addr2line xxx/elf: could not read first record` when reading
collected data from `cargo`, you may need use the latest version of `addr2line`:

```bash
cargo install addr2line --features="bin"
```

### Gathering a perf profile from a `perf.rust-lang.org` test

Often we want to analyze a specific test from `perf.rust-lang.org`.
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