Displaying 20 results from an estimated 21 matches for "__spin_yield_cpu".
2016 Dec 06
1
[PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function
On Mon, Dec 05, 2016 at 10:19:23AM -0500, Pan Xinhui wrote:
> Add two corresponding helper functions to support pv-qspinlock.
>
> For normal use, __spin_yield_cpu will confer current vcpu slices to the
> target vcpu(say, a lock holder). If target vcpu 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 suffe...
2016 Dec 06
1
[PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function
On Mon, Dec 05, 2016 at 10:19:23AM -0500, Pan Xinhui wrote:
> Add two corresponding helper functions to support pv-qspinlock.
>
> For normal use, __spin_yield_cpu will confer current vcpu slices to the
> target vcpu(say, a lock holder). If target vcpu 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 suffe...
2016 Dec 05
0
[PATCH v8 3/6] powerpc: lib/locks.c: Add cpu yield/wake helper function
Add two corresponding helper functions to support pv-qspinlock.
For normal use, __spin_yield_cpu will confer current vcpu slices to the
target vcpu(say, a lock holder). If target vcpu 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 cas...
2016 May 17
0
[PATCH v2 3/6] powerpc: lib/locks.c: cpu yield/wake helper function
...erpc/include/asm/spinlock.h
+++ b/arch/powerpc/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
dif...
2016 Apr 28
0
[PATCH] powerpc: enable qspinlock and its virtualization support
...spinlock.h
@@ -52,6 +52,24 @@
#define SYNC_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
+
+...
2016 Apr 28
0
[PATCH] powerpc: enable qspinlock and its virtualization support
...spinlock.h
@@ -52,6 +52,24 @@
#define SYNC_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
+
+...
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 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 Apr 28
2
[PATCH resend] powerpc: enable qspinlock and its virtualization support
...spinlock.h
@@ -52,6 +52,24 @@
#define SYNC_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
+
+...
2016 Apr 28
2
[PATCH resend] powerpc: enable qspinlock and its virtualization support
...spinlock.h
@@ -52,6 +52,24 @@
#define SYNC_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
+
+...
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 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