41 releases
0.3.7 | Nov 28, 2024 |
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0.3.6 | Jun 12, 2024 |
0.3.5 | Feb 29, 2024 |
0.3.4 | Jun 29, 2023 |
0.2.8 | Mar 21, 2020 |
#20 in Memory management
428,181 downloads per month
Used in 6 crates
3.5MB
5K
SLoC
snmalloc-rs
Notice: MinGW Build is broken and may not be fixed in a near future. See this PR in the upstream.
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. Some recent benchmark results
are listed at
bench_suite. There are three features defined in this crate:
debug
: Enable theDebug
mode insnmalloc
.(removed since 0.3.0)1mib
: Use the1mib
chunk configuration. From0.2.17
, this is set as a default feature(removed since 0.3.0)16mib
: Use the16mib
chunk configuration.(removed since 0.3.0)cache-friendly
: Make the allocator more cache friendly (settingCACHE_FRIENDLY_OFFSET
to64
in building the library).native-cpu
: Optimizesnmalloc
for the native CPU of the host machine. (this is not a default behavior since0.2.14
)qemu
: Workaroundmadvise
problem of QEMU environment(removed since 0.3.0)stats
: Enable statisticslocal_dynamic_tls
: Workaround cannot allocate memory in static tls blockbuild_cc
: Use of cc crate instead of cmake (cmake still default) as builder (more platform agnostic)(removed since 0.3.0)usecxx20
: Enable C++20 standard if availableusecxx17
: Use C++17 standardcheck
: Enable extra checks to improve security, see upstream security docs. Note that thememcpy
protection is not enabled in Rust.win8compat
: Improve compatibility for old Windows platforms (removing usages ofVirtualAlloc2
and other new APIs)lto
: Links with InterProceduralOptimization/LinkTimeOptimizationnotls
: Enables to be loaded dynamically, thus disable tls.stats
: Enables allocation statistics.
To get the crates compiled, you need to choose either 1mib
or 16mib
to determine the chunk configuration
To use snmalloc-rs
add it as a dependency:
# Cargo.toml
[dependencies]
snmalloc-rs = "0.3.4"
To set SnMalloc
as the global allocator add this to your project:
#[global_allocator]
static ALLOC: snmalloc_rs::SnMalloc = snmalloc_rs::SnMalloc;
For MinGW Users
mingw
version is only tested on nightly branch with MSYS environment. We are using dynamic linking method. Hence,
please make sure the following libs are in your PATH
:
winpthread
atomic
stdc++
gcc_s
Notice: since version 0.2.12
, we no longer require you to provide additional environment variables for mingw
target.
For Android Cross-Compilation
ANDROID_NDK
must be provided as an environment variableANDROID_PLATFORM
can be passed as an optional environment variableANDROID_ABI
used by CMake is detected automatically- feature
android-lld
can be used to set the linker ofsnmalloc
tolld
feature(android-shared-std
can be used to set the STL library ofsnmalloc
toc++_shared
(it usesc++_static
by default)libstdc++
is no longer a dependency)
Changelog
0.3.4
- Tracking upstream to version 0.6.2.
0.3.3
- Tracking upstream to fix Linux PAL typo.
0.3.2
- Tracking upstream to enable old Linux variants.
0.3.1
- Fixes
build_cc
feature (broken in 0.3.0 release). - Fixes
native-cpu
feature (broken in 0.3.0 release).
0.3.0
- Release to support snmalloc 0.6.0.
0.3.0-beta.1
- Beta release to support snmalloc
20.6.0