- 1 year ago
Instrumenting a Rust executable for profiling
To instrument a Rust executable for profiling, you can use the built-in profiler support provided by the Rust compiler and various profiling tools available in the Rust ecosystem. Here are the steps to instrument your Rust executable for profiling:
Enable the
#[profiling]
attribute:- In your Rust project, add the
#[profiling]
attribute to the functions or code blocks you want to profile. This attribute enables the Rust profiler.
- In your Rust project, add the
Build the executable with profiling support:
- Use the
--release
flag to enable optimizations in the build process. Profiling is typically done with optimized code. - Specify the
--emit
flag with the valuellvm-ir
to generate LLVM intermediate representation (IR) files during the build process. This is required for some profiling tools. - Example build command:shell
cargo build --release --emit=llvm-ir
- Use the
Use a profiling tool to analyze the generated data:
- Rust provides several profiling tools that can be used to analyze the generated profiling data. Some popular options include:
perf
: A profiling tool available on Linux that can be used to analyze CPU performance and other system-level statistics.flamegraph
: A tool that generates flamegraphs, which visualize profiling data to identify hotspots in the code.cargo-flamegraph
: A Cargo subcommand that simplifies generating flamegraphs for Rust projects.proptest
: A property testing framework for Rust that includes built-in support for generating profiling data.
- Choose a profiling tool based on your specific needs and preferences, and follow the respective tool's documentation for instructions on how to analyze the generated profiling data.
- Rust provides several profiling tools that can be used to analyze the generated profiling data. Some popular options include:
Remember to profile and optimize your code judiciously. Profiling should be done on representative workloads to obtain accurate insights into the performance characteristics of your Rust executable.
For more detailed instructions and guidance on profiling Rust code, refer to the documentation of the specific profiling tools you choose to use. Additionally, the Rust community offers various libraries and resources for profiling, so exploring the Rust ecosystem can provide additional insights and options for profiling your Rust code.