o1heap
snmalloc
| o1heap | snmalloc | |
|---|---|---|
| 4 | 8 | |
| 215 | 1,489 | |
| - | 1.1% | |
| 1.7 | 6.3 | |
| about 1 year ago | 22 days ago | |
| C++ | C++ | |
| MIT License | MIT License |
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o1heap
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I have 16 gigabytes of RAM and I am going to use 16 gigabytes of RAM.
https://github.com/pavel-kirienko/o1heap lol u think you’re kidding
- O1heap: Constant-complexity deterministic memory allocator for embedded systems
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using heap in baremetal embedded
Another option is using an allocator that provides some guarantees that work for your use case, eg https://github.com/pavel-kirienko/o1heap
snmalloc
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Snmalloc: A Message Passing Allocator
https://github.com/microsoft/snmalloc#snmalloc mentions two biggest motivations as:
> Allocations on one thread are freed by a different thread
I can imagine one use-case for this: a task that is scheduled from and executed by a work-stealing thread-pool can allocate memory in one thread but by design there's no guarantee that the memory will be necessarily freed from that exact thread. Would that be a good use-case for snmalloc?
> Deallocations occur in large batches
This sounds much like a bump allocator use-case but which can do this exact thing by calling a single munmap(addr, len) and unmap multiple allocations all at once.
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Is the JVM a upside or downside to Scala?
Yes, it's very efficient and that's not where the main problem lies. However, small allocations with modern C heap allocators like mimalloc or snmalloc has gotten extremely efficient as well. Would be interesting to see a benchmark comparison with Java's G1 and ZGC.
- Snmalloc 0.6 released, major redesign with security hardening
- Snmalloc: High-performance message passing based allocator
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Maintenance status (jemallocator)
Did you ever benchmark against https://github.com/microsoft/snmalloc ?
What are some alternatives?
memory - STL compatible C++ memory allocator library using a new RawAllocator concept that is similar to an Allocator but easier to use and write.
mimalloc - mimalloc is a compact general purpose allocator with excellent performance.
fprime - F´ - A flight software and embedded systems framework
jemallocator - Rust allocator using jemalloc as a backend
real-time-cpp - Source code for the book Real-Time C++, by Christopher Kormanyos
Mesh - A memory allocator that automatically reduces the memory footprint of C/C++ applications.
Vitis-Tutorials - Vitis In-Depth Tutorials
mimalloc_rust - A Rust wrapper over Microsoft's MiMalloc memory allocator
luos_engine - Open-source and real-time orchestrator for cyber-physical-systems, to easily design, test and deploy embedded applications and digital twins.
jemallocator - Rust allocator using jemalloc as a backend
rpmalloc - Public domain cross platform lock free thread caching 16-byte aligned memory allocator implemented in C