Commit 5f1e001b authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Add qspinlock support 



On NUMA system, the performance of qspinlock is better than generic
spinlock. Below is the UnixBench test results on a 8 nodes (4 cores
per node, 32 cores in total) machine.

A. With generic spinlock:

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0  449574022.5  38523.9
Double-Precision Whetstone                       55.0      85190.4  15489.2
Execl Throughput                                 43.0      14696.2   3417.7
File Copy 1024 bufsize 2000 maxblocks          3960.0     143157.8    361.5
File Copy 256 bufsize 500 maxblocks            1655.0      37631.8    227.4
File Copy 4096 bufsize 8000 maxblocks          5800.0     444814.2    766.9
Pipe Throughput                               12440.0    5047490.7   4057.5
Pipe-based Context Switching                   4000.0    2021545.7   5053.9
Process Creation                                126.0      23829.8   1891.3
Shell Scripts (1 concurrent)                     42.4      33756.7   7961.5
Shell Scripts (8 concurrent)                      6.0       4062.9   6771.5
System Call Overhead                          15000.0    2479748.6   1653.2
                                                                   ========
System Benchmarks Index Score                                        2955.6

B. With qspinlock:

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0  449467876.9  38514.8
Double-Precision Whetstone                       55.0      85174.6  15486.3
Execl Throughput                                 43.0      14769.1   3434.7
File Copy 1024 bufsize 2000 maxblocks          3960.0     146150.5    369.1
File Copy 256 bufsize 500 maxblocks            1655.0      37496.8    226.6
File Copy 4096 bufsize 8000 maxblocks          5800.0     447527.0    771.6
Pipe Throughput                               12440.0    5175989.2   4160.8
Pipe-based Context Switching                   4000.0    2207747.8   5519.4
Process Creation                                126.0      25125.5   1994.1
Shell Scripts (1 concurrent)                     42.4      33461.2   7891.8
Shell Scripts (8 concurrent)                      6.0       4024.7   6707.8
System Call Overhead                          15000.0    2917278.6   1944.9
                                                                   ========
System Benchmarks Index Score                                        3040.1

Signed-off-by: default avatarRui Wang <wangrui@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent d2791341

arch/loongarch/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -51,6 +51,7 @@ config LOONGARCH 
	select ARCH_USE_BUILTIN_BSWAP

	select ARCH_USE_CMPXCHG_LOCKREF

	select ARCH_USE_QUEUED_RWLOCKS

	select ARCH_USE_QUEUED_SPINLOCKS

	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT

	select ARCH_WANT_LD_ORPHAN_WARN

	select ARCH_WANTS_NO_INSTR

arch/loongarch/include/asm/Kbuild

+2 −3
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0

generic-y += dma-contiguous.h

generic-y += export.h

generic-y += mcs_spinlock.h

generic-y += parport.h

generic-y += early_ioremap.h

generic-y += qrwlock.h

generic-y += qrwlock_types.h

generic-y += spinlock.h

generic-y += spinlock_types.h

generic-y += qspinlock.h

generic-y += rwsem.h

generic-y += segment.h

generic-y += user.h

arch/loongarch/include/asm/spinlock.h

0 → 100644
+12 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

 */

#ifndef _ASM_SPINLOCK_H

#define _ASM_SPINLOCK_H



#include <asm/processor.h>

#include <asm/qspinlock.h>

#include <asm/qrwlock.h>



#endif /* _ASM_SPINLOCK_H */

arch/loongarch/include/asm/spinlock_types.h

0 → 100644
+11 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

 */

#ifndef _ASM_SPINLOCK_TYPES_H

#define _ASM_SPINLOCK_TYPES_H



#include <asm-generic/qspinlock_types.h>

#include <asm-generic/qrwlock_types.h>



#endif