[libc] Rework slab cache data structure for GPU allocator Summary: This was previously a Trieber stack, which is a perfectly fine generic and lock-free data structure. However, this used some expensive CAS operations and had issues with ABA. Because the only user of this was the slab cache mechanism, we can pretty safely specialize it. Instead, we simply search a fixed size buffer for some sentinal values and CAS into it. For allocations that only ever hit the cache, this improves performance from ~9000 cycles to ~6000 cycles and similar improvements for workloads that feel the pain of small thread counts hitting the cache.
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Consult the Getting Started with LLVM page for information on building and running LLVM.
For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.
Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.
The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.