linux/arch/loongarch
WANG Rui affef66b65 LoongArch: Relax memory ordering for atomic operations
This patch relaxes the implementation while satisfying the memory ordering
requirements for atomic operations, which will help improve performance on
LA664+.

Unixbench with full threads (8)
                                           before       after
  Dhrystone 2 using register variables   203910714.2  203909539.8   0.00%
  Double-Precision Whetstone                 37930.9        37931   0.00%
  Execl Throughput                           29431.5      29545.8   0.39%
  File Copy 1024 bufsize 2000 maxblocks    6645759.5      6676320   0.46%
  File Copy 256 bufsize 500 maxblocks      2138772.4    2144182.4   0.25%
  File Copy 4096 bufsize 8000 maxblocks   11640698.4     11602703  -0.33%
  Pipe Throughput                          8849077.7    8917009.4   0.77%
  Pipe-based Context Switching             1255108.5    1287277.3   2.56%
  Process Creation                           50825.9      50442.1  -0.76%
  Shell Scripts (1 concurrent)               25795.8      25942.3   0.57%
  Shell Scripts (8 concurrent)                3812.6       3835.2   0.59%
  System Call Overhead                     9248212.6    9353348.6   1.14%
                                                                  =======
  System Benchmarks Index Score               8076.6       8114.4   0.47%

Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-11-08 14:12:15 +08:00
..
boot loongarch: efi: enable generic EFI compressed boot 2022-09-20 09:50:31 +02:00
configs LoongArch: Update Loongson-3 default config file 2023-09-07 12:06:20 +08:00
crypto LoongArch: crypto: Add crc32 and crc32c hw acceleration 2023-05-01 17:19:43 +08:00
include LoongArch: Relax memory ordering for atomic operations 2023-11-08 14:12:15 +08:00
kernel LoongArch: Disable WUC for pgprot_writecombine() like ioremap_wc() 2023-10-18 08:42:52 +08:00
lib LoongArch: Add KASAN (Kernel Address Sanitizer) support 2023-09-06 22:54:16 +08:00
mm LoongArch: Replace kmap_atomic() with kmap_local_page() in copy_user_highpage() 2023-10-18 08:42:52 +08:00
net LoongArch: BPF: Fix check condition to call lu32id in move_imm() 2023-07-28 10:30:42 +08:00
pci LoongArch: Add FDT booting support from efi system table 2022-12-14 08:41:53 +08:00
power LoongArch: Export some arch-specific pm interfaces 2023-06-29 20:58:44 +08:00
vdso LoongArch: Add KASAN (Kernel Address Sanitizer) support 2023-09-06 22:54:16 +08:00
Kbuild LoongArch: Add BPF JIT support 2022-10-12 16:36:20 +08:00
Kconfig LoongArch: Support PREEMPT_DYNAMIC with static keys 2023-11-08 14:12:01 +08:00
Kconfig.debug LoongArch: Add prologue unwinder support 2022-08-12 13:10:11 +08:00
Makefile LoongArch: Disable module from accessing external data directly 2023-11-08 14:12:07 +08:00