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a275a82dcd
Use the alternative to optimize common libraries according whether CPU
has UAL (hardware unaligned access support) feature, including memset(),
memcopy(), memmove(), copy_user() and clear_user().
We have tested UnixBench on a Loongson-3A5000 quad-core machine (1.6GHz):
1, One copy, before patch:
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 9566582.0 819.8
Double-Precision Whetstone 55.0 2805.3 510.1
Execl Throughput 43.0 2120.0 493.0
File Copy 1024 bufsize 2000 maxblocks 3960.0 209833.0 529.9
File Copy 256 bufsize 500 maxblocks 1655.0 89400.0 540.2
File Copy 4096 bufsize 8000 maxblocks 5800.0 320036.0 551.8
Pipe Throughput 12440.0 340624.0 273.8
Pipe-based Context Switching 4000.0 109939.1 274.8
Process Creation 126.0 4728.7 375.3
Shell Scripts (1 concurrent) 42.4 2223.1 524.3
Shell Scripts (8 concurrent) 6.0 883.1 1471.9
System Call Overhead 15000.0 518639.1 345.8
========
System Benchmarks Index Score 500.2
2, One copy, after patch:
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 9567674.7 819.9
Double-Precision Whetstone 55.0 2805.5 510.1
Execl Throughput 43.0 2392.7 556.4
File Copy 1024 bufsize 2000 maxblocks 3960.0 417804.0 1055.1
File Copy 256 bufsize 500 maxblocks 1655.0 112909.5 682.2
File Copy 4096 bufsize 8000 maxblocks 5800.0 1255207.4 2164.2
Pipe Throughput 12440.0 555712.0 446.7
Pipe-based Context Switching 4000.0 99964.5 249.9
Process Creation 126.0 5192.5 412.1
Shell Scripts (1 concurrent) 42.4 2302.4 543.0
Shell Scripts (8 concurrent) 6.0 919.6 1532.6
System Call Overhead 15000.0 511159.3 340.8
========
System Benchmarks Index Score 640.1
3, Four copies, before patch:
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 38268610.5 3279.2
Double-Precision Whetstone 55.0 11222.2 2040.4
Execl Throughput 43.0 7892.0 1835.3
File Copy 1024 bufsize 2000 maxblocks 3960.0 235149.6 593.8
File Copy 256 bufsize 500 maxblocks 1655.0 74959.6 452.9
File Copy 4096 bufsize 8000 maxblocks 5800.0 545048.5 939.7
Pipe Throughput 12440.0 1337359.0 1075.0
Pipe-based Context Switching 4000.0 473663.9 1184.2
Process Creation 126.0 17491.2 1388.2
Shell Scripts (1 concurrent) 42.4 6865.7 1619.3
Shell Scripts (8 concurrent) 6.0 1015.9 1693.1
System Call Overhead 15000.0 1899535.2 1266.4
========
System Benchmarks Index Score 1278.3
4, Four copies, after patch:
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 38272815.5 3279.6
Double-Precision Whetstone 55.0 11222.8 2040.5
Execl Throughput 43.0 8839.2 2055.6
File Copy 1024 bufsize 2000 maxblocks 3960.0 313912.9 792.7
File Copy 256 bufsize 500 maxblocks 1655.0 80976.1 489.3
File Copy 4096 bufsize 8000 maxblocks 5800.0 1176594.3 2028.6
Pipe Throughput 12440.0 2100941.9 1688.9
Pipe-based Context Switching 4000.0 476696.4 1191.7
Process Creation 126.0 18394.7 1459.9
Shell Scripts (1 concurrent) 42.4 7172.2 1691.6
Shell Scripts (8 concurrent) 6.0 1058.3 1763.9
System Call Overhead 15000.0 1874714.7 1249.8
========
System Benchmarks Index Score 1488.8
Signed-off-by: Jun Yi <yijun@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
96 lines
1.5 KiB
ArmAsm
96 lines
1.5 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <asm/alternative-asm.h>
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#include <asm/asm.h>
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#include <asm/asmmacro.h>
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#include <asm/cpu.h>
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#include <asm/export.h>
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#include <asm/regdef.h>
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SYM_FUNC_START(memcpy)
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/*
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* Some CPUs support hardware unaligned access
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*/
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ALTERNATIVE "b __memcpy_generic", \
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"b __memcpy_fast", CPU_FEATURE_UAL
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SYM_FUNC_END(memcpy)
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EXPORT_SYMBOL(memcpy)
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/*
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* void *__memcpy_generic(void *dst, const void *src, size_t n)
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*
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* a0: dst
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* a1: src
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* a2: n
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*/
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SYM_FUNC_START(__memcpy_generic)
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move a3, a0
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beqz a2, 2f
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1: ld.b t0, a1, 0
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st.b t0, a0, 0
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addi.d a0, a0, 1
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addi.d a1, a1, 1
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addi.d a2, a2, -1
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bgt a2, zero, 1b
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2: move a0, a3
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jr ra
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SYM_FUNC_END(__memcpy_generic)
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/*
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* void *__memcpy_fast(void *dst, const void *src, size_t n)
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*
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* a0: dst
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* a1: src
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* a2: n
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*/
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SYM_FUNC_START(__memcpy_fast)
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move a3, a0
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beqz a2, 3f
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ori a4, zero, 64
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blt a2, a4, 2f
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/* copy 64 bytes at a time */
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1: ld.d t0, a1, 0
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ld.d t1, a1, 8
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ld.d t2, a1, 16
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ld.d t3, a1, 24
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ld.d t4, a1, 32
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ld.d t5, a1, 40
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ld.d t6, a1, 48
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ld.d t7, a1, 56
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st.d t0, a0, 0
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st.d t1, a0, 8
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st.d t2, a0, 16
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st.d t3, a0, 24
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st.d t4, a0, 32
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st.d t5, a0, 40
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st.d t6, a0, 48
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st.d t7, a0, 56
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addi.d a0, a0, 64
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addi.d a1, a1, 64
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addi.d a2, a2, -64
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bge a2, a4, 1b
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beqz a2, 3f
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/* copy the remaining bytes */
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2: ld.b t0, a1, 0
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st.b t0, a0, 0
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addi.d a0, a0, 1
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addi.d a1, a1, 1
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addi.d a2, a2, -1
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bgt a2, zero, 2b
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/* return */
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3: move a0, a3
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jr ra
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SYM_FUNC_END(__memcpy_fast)
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