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LoongArch: Select THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE

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THP_SWAP has been proven to improve the swap throughput significantly on
x86_64 system according to commit bd4c82c22c ("mm, THP, swap: delay
splitting THP after swapped out"), on ARM64 system according to commit
d0637c505f ("arm64: enable THP_SWAP for arm64") and on RISC-V system
according to commit 87f81e66e2 ("riscv: enable THP_SWAP for RV64").

Enable THP_SWAP for LoongArch, testing the micro-benchmark which is
introduced by commit d0637c505f ("arm64: enable THP_SWAP for arm64")
shows below numbers on the Loongson-3A5000 board:

swp out bandwidth w/o patch: 1815716 bytes/ms (mean of 10 tests)
swp out bandwidth w/  patch: 3410003 bytes/ms (mean of 10 tests)

Improved by 46.75%!

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Huacai Chen 2024-05-14 12:24:18 +08:00
parent d0b35b0247
commit ff4a2443ef
1 changed files with 1 additions and 0 deletions
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1
arch/loongarch/Kconfig
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@ -70,6 +70,7 @@ config LOONGARCH
select ARCH_WANT_LD_ORPHAN_WARN
select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
select ARCH_WANTS_NO_INSTR
select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE
select BUILDTIME_TABLE_SORT
select COMMON_CLK
select CPU_PM