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GGitHub[libc] Add a config option to disable slab reclaiming (#151599)

c18de24d创建于 2025年10月11日历史提交

文件	最后提交记录	最后更新时间
CMakeLists.txt	[libc] Cache old slabs when allocating GPU memory (#151866) Summary: This patch introduces a lock-free stack used to store a fixed number of slabs. Instead of going directly through RPC memory, we instead can consult the cache and use that. Currently, this means that ~64 MiB of memory will remain in-use if the user completely fills the cache. However, because we always fully destroy the object, the chunk size can be reset so they can be fully reused. This greatly improves performance in cases where the user has previously accessed malloc, lowering the difference between an implementation that does not free slabs at all and one that does. We can also skip the expensive zeroing step if the old chunk size was smaller than the previous one. Smaller chunk sizes need a larger bitfield, and because we know for a fact that the number of users remaining in this slab is zero thanks to the reference counting we can guarantee that the bitfield is all zero like when it was initialized.	11 个月前
allocator.cpp	[libc] Add a config option to disable slab reclaiming (#151599) Summary: Without slab reclaiming this interface is much simpler and it can speed up cases with a lot of churn. Basically, wastes memory for performance.	9 个月前
allocator.h	[libc][NFC] Add stdint.h proxy header to fix dependency issue with <stdint.h> includes. (#150303) https://github.com/llvm/llvm-project/issues/149993	1 年前
fixedstack.h	[libc] Cache old slabs when allocating GPU memory (#151866) Summary: This patch introduces a lock-free stack used to store a fixed number of slabs. Instead of going directly through RPC memory, we instead can consult the cache and use that. Currently, this means that ~64 MiB of memory will remain in-use if the user completely fills the cache. However, because we always fully destroy the object, the chunk size can be reset so they can be fully reused. This greatly improves performance in cases where the user has previously accessed malloc, lowering the difference between an implementation that does not free slabs at all and one that does. We can also skip the expensive zeroing step if the old chunk size was smaller than the previous one. Smaller chunk sizes need a larger bitfield, and because we know for a fact that the number of users remaining in this slab is zero thanks to the reference counting we can guarantee that the bitfield is all zero like when it was initialized.	11 个月前
utils.h	[libc][NFC] Add u64 shuffle helpers to GPU Summary: Precommit for later use.	1 年前