snmalloc-rs

MSVC/MinGW/Linux/MacOS:

FreeBSD:

snmalloc-rs provides a wrapper for microsoft/snmalloc to make it usable as a global allocator for rust. snmalloc is a research allocator. Its key design features are:

• Memory that is freed by the same thread that allocated it does not require any synchronising operations.
• Freeing memory in a different thread to initially allocated it, does not take any locks and instead uses a novel message passing scheme to return the memory to the original allocator, where it is recycled.
• The allocator uses large ranges of pages to reduce the amount of meta-data required.

Some old benchmark results are available in the snmalloc paper. There are three features defined in this crate: - debug: Enable the Debug mode in snmalloc. - 1mib: Use the 1mib chunk configuration. - cache-friendly: Make the allocator more cache friendly (setting CACHE_FRIENDLY_OFFSET to 64 in building the library).

To use snmalloc-rs add it as a dependency: ```toml

Cargo.toml

[dependencies] snmalloc-rs = "0.2" ```

To set SnMalloc as the global allocator add this to your project: ```rust

[global_allocator]

static ALLOC: snmallocrs::SnMalloc = snmallocrs::SnMalloc; ```

For MinGW Users

mingw version is only tested on nighly branch. Due to the complexity of locating GNU libraries on Windows environment, the library requests you to provide a MINGW64_BIN environment variable during compiling. Since GCC does not provide a option for us to link libatomic statically, I have to use dynamic linking. Hence, please make sure the following libs are in your PATH: - winpthread - atomic - stdc++ - gcc_s

This is the best thing I can do for current stage, if you have any better solution, please do help me to provide a better support for MinGW

Changelog

0.2.9 - upstream fix OpenEnclave

• upstream adjust remote batch size (performance improved dramatically, see benchmark

• upstream improve slow path performance for allocation

  0.2.8

• More CI (ARM64 on QEMU)

• upstream ARM(32/64) support
• upstream x86-SGX support

0.2.7

• partially fixed mingw
• upstream remote dealloc refactor (higher performance)
• upstream remove extra assertions

for older versions, see CHANGELOG