search for: __spin_wake_cpu

Displaying 20 results from an estimated 21 matches for "__spin_wake_cpu".

2016 Dec 06
1
[PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function
...running state, such conferging to lpar happens or not depends. > > Because hcall itself will introduce latency and a little overhead. And we > do NOT want to suffer any latency on some cases, e.g. in interrupt handler. > The second parameter *confer* can indicate such case. > > __spin_wake_cpu is simpiler, it will wake up one vcpu regardless of its > current vcpu state. > > Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> > --- > arch/powerpc/include/asm/spinlock.h | 4 +++ > arch/powerpc/lib/locks.c | 59 +++++++++++++++++++++++++++++++++...
2016 Dec 06
1
[PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function
...running state, such conferging to lpar happens or not depends. > > Because hcall itself will introduce latency and a little overhead. And we > do NOT want to suffer any latency on some cases, e.g. in interrupt handler. > The second parameter *confer* can indicate such case. > > __spin_wake_cpu is simpiler, it will wake up one vcpu regardless of its > current vcpu state. > > Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> > --- > arch/powerpc/include/asm/spinlock.h | 4 +++ > arch/powerpc/lib/locks.c | 59 +++++++++++++++++++++++++++++++++...
2016 Dec 05
0
[PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function
...u is not specified or it is in running state, such conferging to lpar happens or not depends. Because hcall itself will introduce latency and a little overhead. And we do NOT want to suffer any latency on some cases, e.g. in interrupt handler. The second parameter *confer* can indicate such case. __spin_wake_cpu is simpiler, it will wake up one vcpu regardless of its current vcpu state. Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com> --- arch/powerpc/include/asm/spinlock.h | 4 +++ arch/powerpc/lib/locks.c | 59 +++++++++++++++++++++++++++++++++++++ 2 files changed, 63 inse...
2016 May 17
0
[PATCH v2 3/6] powerpc: lib/locks.c: cpu yield/wake helper function
...owerpc/include/asm/spinlock.h @@ -56,9 +56,13 @@ /* We only yield to the hypervisor if we are in shared processor mode */ #define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); extern void __rw_yield(arch_rwlock_t *lock); #else /* SPLPAR */ #define __spin_yield(x) barrier() +#define __spin_yield_cpu(x) barrier() +#define __spin_wake_cpu(x) barrier() #define __rw_yield(x) barrier() #define SHARED_PROCESSOR 0 #endif diff --git a/arch/powerpc/lib/locks.c b/ar...
2016 Apr 28
0
[PATCH] powerpc: enable qspinlock and its virtualization support
...YNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __spin_yield_cpu(x) barrier() +#define __spin_wake_cpu(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#includ...
2016 Apr 28
0
[PATCH] powerpc: enable qspinlock and its virtualization support
...YNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __spin_yield_cpu(x) barrier() +#define __spin_wake_cpu(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#includ...
2016 Dec 05
9
[PATCH v8 0/6] Implement qspinlock/pv-qspinlock on ppc
Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v7 -> v8: add one patch to drop a function call
2016 Dec 05
9
[PATCH v8 0/6] Implement qspinlock/pv-qspinlock on ppc
Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v7 -> v8: add one patch to drop a function call
2016 Apr 28
2
[PATCH resend] powerpc: enable qspinlock and its virtualization support
...YNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __spin_yield_cpu(x) barrier() +#define __spin_wake_cpu(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#includ...
2016 Apr 28
2
[PATCH resend] powerpc: enable qspinlock and its virtualization support
...YNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __spin_yield_cpu(x) barrier() +#define __spin_wake_cpu(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#includ...
2016 May 17
6
[PATCH v3 0/6] powerpc use pv-qpsinlock instead of spinlock
change fome v1: separate into 6 pathes from one patch some minor code changes. benchmark test results are below. run 3 tests on pseries IBM,8408-E8E with 32cpus, 64GB memory perf bench futex hash perf bench futex lock-pi perf record -advRT || perf bench sched messaging -g 1000 || perf report summary: _____test________________spinlcok______________pv-qspinlcok_____ |futex hash | 556370 ops |
2016 May 17
6
[PATCH v3 0/6] powerpc use pv-qpsinlock instead of spinlock
change fome v1: separate into 6 pathes from one patch some minor code changes. benchmark test results are below. run 3 tests on pseries IBM,8408-E8E with 32cpus, 64GB memory perf bench futex hash perf bench futex lock-pi perf record -advRT || perf bench sched messaging -g 1000 || perf report summary: _____test________________spinlcok______________pv-qspinlcok_____ |futex hash | 556370 ops |
2016 Dec 06
6
[PATCH v9 0/6] Implement qspinlock/pv-qspinlock on ppc
Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v8 -> v9: mv qspinlocm config entry to
2016 Dec 06
6
[PATCH v9 0/6] Implement qspinlock/pv-qspinlock on ppc
Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v8 -> v9: mv qspinlocm config entry to
2016 May 25
10
[PATCH v3 0/6] powerpc use pv-qpsinlock as the default spinlock implemention
change from v2: __spin_yeild_cpu() will yield slices to lpar if target cpu is running. remove unnecessary rmb() in __spin_yield/wake_cpu. __pv_wait() will check the *ptr == val. some commit message change change fome v1: separate into 6 pathes from one patch some minor code changes. I do several tests on pseries IBM,8408-E8E with 32cpus, 64GB memory. benchmark test results are below. 2
2016 May 25
10
[PATCH v3 0/6] powerpc use pv-qpsinlock as the default spinlock implemention
change from v2: __spin_yeild_cpu() will yield slices to lpar if target cpu is running. remove unnecessary rmb() in __spin_yield/wake_cpu. __pv_wait() will check the *ptr == val. some commit message change change fome v1: separate into 6 pathes from one patch some minor code changes. I do several tests on pseries IBM,8408-E8E with 32cpus, 64GB memory. benchmark test results are below. 2
2016 Jun 02
9
[PATCH v5 0/6] powerPC/pSeries use pv-qpsinlock as the default spinlock implemention
change from v4: BUG FIX. thanks boqun reporting this issue. struct __qspinlock has different layout in bigendian mahcine. native_queued_spin_unlock() may write value to a wrong address. now fix it. sorry for not even doing a test on bigendian machine before!!! change from v3: a big change in [PATCH v4 4/6] pv-qspinlock: powerpc support pv-qspinlock no other patch changed. and the patch
2016 Jun 02
9
[PATCH v5 0/6] powerPC/pSeries use pv-qpsinlock as the default spinlock implemention
change from v4: BUG FIX. thanks boqun reporting this issue. struct __qspinlock has different layout in bigendian mahcine. native_queued_spin_unlock() may write value to a wrong address. now fix it. sorry for not even doing a test on bigendian machine before!!! change from v3: a big change in [PATCH v4 4/6] pv-qspinlock: powerpc support pv-qspinlock no other patch changed. and the patch
2016 Jun 02
8
[PATCH v5 0/6] powerPC/pSeries use pv-qpsinlock as the default spinlock implemention
From: root <root at ltcalpine2-lp13.aus.stglabs.ibm.com> change from v4: BUG FIX. thanks boqun reporting this issue. struct __qspinlock has different layout in bigendian mahcine. native_queued_spin_unlock() may write value to a wrong address. now fix it. change from v3: a big change in [PATCH v4 4/6] pv-qspinlock: powerpc support pv-qspinlock no other patch changed. and the patch
2016 Jun 02
8
[PATCH v5 0/6] powerPC/pSeries use pv-qpsinlock as the default spinlock implemention
From: root <root at ltcalpine2-lp13.aus.stglabs.ibm.com> change from v4: BUG FIX. thanks boqun reporting this issue. struct __qspinlock has different layout in bigendian mahcine. native_queued_spin_unlock() may write value to a wrong address. now fix it. change from v3: a big change in [PATCH v4 4/6] pv-qspinlock: powerpc support pv-qspinlock no other patch changed. and the patch