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Profiling with perf: specify the section of bootstrap settings. #2475

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Jun 17, 2025
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Profiling with perf: specify the section of bootstrap settings. #2475

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4 changes: 2 additions & 2 deletions src/profiling/with_perf.md
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Expand Up @@ -7,8 +7,8 @@ This is a guide for how to profile rustc with [perf](https://perf.wiki.kernel.or
- Get a clean checkout of rust-lang/master, or whatever it is you want
to profile.
- Set the following settings in your `bootstrap.toml`:
- `debuginfo-level = 1` - enables line debuginfo
- `jemalloc = false` - lets you do memory use profiling with valgrind
- `rust.debuginfo-level = 1` - enables line debuginfo
- `rust.jemalloc = false` - lets you do memory use profiling with valgrind
- leave everything else the defaults
- Run `./x build` to get a full build
- Make a rustup toolchain pointing to that result
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