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flamegraph-0.6.5
cargo-flamegraph
A simple cargo plugin that generates a flamegraph for a given workload.
Uses perf on linux and dtrace otherwise.
Windows is getting dtrace support, so if you try this out please let us know how it goes :D
Installation
cargo install flamegraph
This will make the cargo-flamegraph binary
available in your cargo binary directory.
On most systems this is usually something
like ~/.cargo/bin.
Examples
# defaults to profiling cargo run, which will
# also profile the cargo compilation process
# unless you've previously issued `cargo build`
cargo flamegraph
# if you'd like to profile your release build:
cargo flamegraph --release
# if you'd like to profile a specific binary:
cargo flamegraph --bin=stress2
# if you'd like to profile an arbitrary executable:
cargo flamegraph --exec="/path/to/my/binary --some-arg 5"
Usage
USAGE:
cargo flamegraph [FLAGS] [OPTIONS]
FLAGS:
-h, --help Prints help information
-r, --release Activate release mode
-V, --version Prints version information
OPTIONS:
-b, --bin <bin> Binary to run
-e, --exec <exec> Other command to run
-f, --features <features> Build features to enable
-o, --output <output> Output file, flamegraph.svg if not present
Enabling perf for use by unpriviledged users
To enable perf without running as root, you may
lower the perf_event_paranoid value in proc
to an appropriate level for your environment.
The most permissive value is -1 but may not
be acceptable for your security needs etc...
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