microsoft / microsoft/snmalloc
Aarch64 LSE 16-byte CAS operation
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- Dominant language
- C++
- Stars
- 2k
- Forks
- 138
- Avg merge
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- Merged PRs (30d)
- 5
Description
Since we are not using LL/SC abstraction anyway, perhaps we can relax the first condition to defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16) || defined(PLATFORM_IS_X86)
This allows compiler to emit 16b CAS based code on aarch64 platform with LSE.
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First steps
- Read the whole issue, then the project's contributing guide.
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Research direction
Start at src/snmalloc/ds/aba.h around line 24 and review the existing 16-byte CAS platform condition alongside the linked ARM CASP documentation. Verify the proposed condition on an Aarch64 toolchain with LSE support and confirm that the allocator builds and its relevant tests pass with the emitted 16-byte CAS code.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- operating-systems
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100