diff options
| author | Jisheng Zhang <jszhang@kernel.org> | 2023-12-20 01:50:46 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-01-24 15:55:56 -0800 |
| commit | 3f910b7a522e064d7261f31a00d9c9dca31d902a (patch) | |
| tree | 73bdd6bb36be0ca2a5dfb61e5f04fadec1833566 /arch/riscv/Kconfig | |
| parent | 69be3fb111e73bd025ce6d2322371da5aa497c70 (diff) | |
riscv: enable HAVE_FAST_GUP if MMU
Activate the fast gup for riscv mmu platforms. Here are some
GUP_FAST_BENCHMARK performance numbers:
Before the patch:
GUP_FAST_BENCHMARK: Time: get:53203 put:5085 us
After the patch:
GUP_FAST_BENCHMARK: Time: get:17711 put:5060 us
The get time is reduced by 66.7%! IOW, 3x get speed!
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20231219175046.2496-5-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index a0d9b8f5371d..9e1e7c74b1f9 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -119,6 +119,7 @@ config RISCV select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER if !XIP_KERNEL && !PREEMPTION select HAVE_EBPF_JIT if MMU + select HAVE_FAST_GUP if MMU select HAVE_FUNCTION_ARG_ACCESS_API select HAVE_FUNCTION_ERROR_INJECTION select HAVE_GCC_PLUGINS |