[PATCH v2 0/7] Enable queued rwlock and queued spinlock for SPARC
This series of patches enables queued rwlock and queued spinlock support for SPARC. These features were introduced some time ago in upstream. Here are some of the earlier discussions. https://lwn.net/Articles/572765/ https://lwn.net/Articles/582200/ https://lwn.net/Articles/561775/ https://lwn.net/Articles/590243/ Tests: Ran AIM7 benchmark to verify the performance on various workloads. https://github.com/davidlohr/areaim. Same benchmark was used when this feature was introduced and enabled on x86. Here are the test results. Kernel 4.11.0-rc6 4.11.0-rc6 + Change baselinequeued locks (Avg No.of jobs) (Avg No.of jobs) Workload High systime 10-100 user 17290.4817295.18 +0.02 High systime 200-1000 users 109814.95 110248.87 +0.39 High systime 1200-2000 users107912.40 127923.16 +18.54 Disk IO 10-100 users168910.16 158834.17 -5.96 Disk IO 200-1000 users 242781.74 281285.80 +15.85 Disk IO 1200-2000 users 228518.23 218421.23 -4.41 Disk IO 10-100 users183933.77 207928.67 +13.04 Disk IO 200-1000 users 491981.56 500162.33 +1.66 Disk IO 1200-2000 users 463395.66 467312.70 +0.84 fserver 10-100 users254177.53 270283.08 +6.33 fserver IO 200-1000 users 269017.35 324812.2+20.74 fserver IO 1200-2000 users 229538.87 284713.77 +24.03 Disk I/O results are little bit in negative territory. But majority of the performance changes are in positive and it is significant in some cases. Changes: v1->v2: Addressed the comments from David Miller. 1. Added CPU_BIG_ENDIAN for all SPARC 2. Removed #ifndef __LINUX_SPINLOCK_TYPES_H guard from spinlock_types.h 3. Removed check for CONFIG_QUEUED_RWLOCKS in SPARC64 as it is the default definition for SPARC64 now. Cleaned-up the previous arch_read_xxx and arch_write_xxx definitions as it is defined now in qrwlock.h. 4. Removed check for CONFIG_QUEUED_SPINLOCKS in SPARC64 as it is the default definition now for SPARC64 now. Cleaned-up the previous arch_spin_xxx definitions as it is defined in qspinlock.h. v1: Initial version Babu Moger (7): kernel/locking: Fix compile error with qrwlock.c arch/sparc: Remove the check #ifndef __LINUX_SPINLOCK_TYPES_H arch/sparc: Define config parameter CPU_BIG_ENDIAN arch/sparc: Introduce cmpxchg_u8 SPARC arch/sparc: Enable queued rwlocks for SPARC arch/sparc: Introduce xchg16 for SPARC arch/sparc: Enable queued spinlock support for SPARC arch/sparc/Kconfig |6 + arch/sparc/include/asm/cmpxchg_64.h | 76 ++-- arch/sparc/include/asm/qrwlock.h|7 + arch/sparc/include/asm/qspinlock.h |7 + arch/sparc/include/asm/spinlock_64.h| 208 +-- arch/sparc/include/asm/spinlock_types.h | 12 ++- include/asm-generic/qrwlock_types.h |6 +- kernel/locking/qrwlock.c|1 + 8 files changed, 101 insertions(+), 222 deletions(-) create mode 100644 arch/sparc/include/asm/qrwlock.h create mode 100644 arch/sparc/include/asm/qspinlock.h
[PATCH v2 0/7] Enable queued rwlock and queued spinlock for SPARC
This series of patches enables queued rwlock and queued spinlock support for SPARC. These features were introduced some time ago in upstream. Here are some of the earlier discussions. https://lwn.net/Articles/572765/ https://lwn.net/Articles/582200/ https://lwn.net/Articles/561775/ https://lwn.net/Articles/590243/ Tests: Ran AIM7 benchmark to verify the performance on various workloads. https://github.com/davidlohr/areaim. Same benchmark was used when this feature was introduced and enabled on x86. Here are the test results. Kernel 4.11.0-rc6 4.11.0-rc6 + Change baselinequeued locks (Avg No.of jobs) (Avg No.of jobs) Workload High systime 10-100 user 17290.4817295.18 +0.02 High systime 200-1000 users 109814.95 110248.87 +0.39 High systime 1200-2000 users107912.40 127923.16 +18.54 Disk IO 10-100 users168910.16 158834.17 -5.96 Disk IO 200-1000 users 242781.74 281285.80 +15.85 Disk IO 1200-2000 users 228518.23 218421.23 -4.41 Disk IO 10-100 users183933.77 207928.67 +13.04 Disk IO 200-1000 users 491981.56 500162.33 +1.66 Disk IO 1200-2000 users 463395.66 467312.70 +0.84 fserver 10-100 users254177.53 270283.08 +6.33 fserver IO 200-1000 users 269017.35 324812.2+20.74 fserver IO 1200-2000 users 229538.87 284713.77 +24.03 Disk I/O results are little bit in negative territory. But majority of the performance changes are in positive and it is significant in some cases. Changes: v1->v2: Addressed the comments from David Miller. 1. Added CPU_BIG_ENDIAN for all SPARC 2. Removed #ifndef __LINUX_SPINLOCK_TYPES_H guard from spinlock_types.h 3. Removed check for CONFIG_QUEUED_RWLOCKS in SPARC64 as it is the default definition for SPARC64 now. Cleaned-up the previous arch_read_xxx and arch_write_xxx definitions as it is defined now in qrwlock.h. 4. Removed check for CONFIG_QUEUED_SPINLOCKS in SPARC64 as it is the default definition now for SPARC64 now. Cleaned-up the previous arch_spin_xxx definitions as it is defined in qspinlock.h. v1: Initial version Babu Moger (7): kernel/locking: Fix compile error with qrwlock.c arch/sparc: Remove the check #ifndef __LINUX_SPINLOCK_TYPES_H arch/sparc: Define config parameter CPU_BIG_ENDIAN arch/sparc: Introduce cmpxchg_u8 SPARC arch/sparc: Enable queued rwlocks for SPARC arch/sparc: Introduce xchg16 for SPARC arch/sparc: Enable queued spinlock support for SPARC arch/sparc/Kconfig |6 + arch/sparc/include/asm/cmpxchg_64.h | 76 ++-- arch/sparc/include/asm/qrwlock.h|7 + arch/sparc/include/asm/qspinlock.h |7 + arch/sparc/include/asm/spinlock_64.h| 208 +-- arch/sparc/include/asm/spinlock_types.h | 12 ++- include/asm-generic/qrwlock_types.h |6 +- kernel/locking/qrwlock.c|1 + 8 files changed, 101 insertions(+), 222 deletions(-) create mode 100644 arch/sparc/include/asm/qrwlock.h create mode 100644 arch/sparc/include/asm/qspinlock.h
