Displaying 7 results from an estimated 7 matches for "h_cede".
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2016 May 17
0
[PATCH v2 3/6] powerpc: lib/locks.c: cpu yield/wake helper function
....c
index a9ebd71..4109679a 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -23,6 +23,38 @@
#include <asm/hvcall.h>
#include <asm/smp.h>
+void __spin_yield_cpu(int cpu)
+{
+ unsigned int holder_cpu = cpu, yield_count;
+
+ if (cpu == -1) {
+ plpar_hcall_norets(H_CEDE);
+ return;
+ }
+ BUG_ON(holder_cpu >= nr_cpu_ids);
+ yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
+ if ((yield_count & 1) == 0)
+ return; /* virtual cpu is currently running */
+ rmb();
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count)...
2016 Apr 28
0
[PATCH] powerpc: enable qspinlock and its virtualization support
...s.c
index f7deebd..6e9d3bb 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -23,6 +23,35 @@
#include <asm/hvcall.h>
#include <asm/smp.h>
+void __spin_yield_cpu(int cpu)
+{
+ unsigned int holder_cpu = cpu, yield_count;
+
+ if (cpu == -1) {
+ plpar_hcall_norets(H_CEDE);
+ return;
+ }
+ BUG_ON(holder_cpu >= nr_cpu_ids);
+ yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
+ if ((yield_count & 1) == 0)
+ return; /* virtual cpu is currently running */
+ rmb();
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count)...
2016 Apr 28
0
[PATCH] powerpc: enable qspinlock and its virtualization support
...s.c
index f7deebd..6e9d3bb 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -23,6 +23,35 @@
#include <asm/hvcall.h>
#include <asm/smp.h>
+void __spin_yield_cpu(int cpu)
+{
+ unsigned int holder_cpu = cpu, yield_count;
+
+ if (cpu == -1) {
+ plpar_hcall_norets(H_CEDE);
+ return;
+ }
+ BUG_ON(holder_cpu >= nr_cpu_ids);
+ yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
+ if ((yield_count & 1) == 0)
+ return; /* virtual cpu is currently running */
+ rmb();
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count)...
2016 Apr 28
2
[PATCH resend] powerpc: enable qspinlock and its virtualization support
...s.c
index f7deebd..6e9d3bb 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -23,6 +23,35 @@
#include <asm/hvcall.h>
#include <asm/smp.h>
+void __spin_yield_cpu(int cpu)
+{
+ unsigned int holder_cpu = cpu, yield_count;
+
+ if (cpu == -1) {
+ plpar_hcall_norets(H_CEDE);
+ return;
+ }
+ BUG_ON(holder_cpu >= nr_cpu_ids);
+ yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
+ if ((yield_count & 1) == 0)
+ return; /* virtual cpu is currently running */
+ rmb();
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count)...
2016 Apr 28
2
[PATCH resend] powerpc: enable qspinlock and its virtualization support
...s.c
index f7deebd..6e9d3bb 100644
--- a/arch/powerpc/lib/locks.c
+++ b/arch/powerpc/lib/locks.c
@@ -23,6 +23,35 @@
#include <asm/hvcall.h>
#include <asm/smp.h>
+void __spin_yield_cpu(int cpu)
+{
+ unsigned int holder_cpu = cpu, yield_count;
+
+ if (cpu == -1) {
+ plpar_hcall_norets(H_CEDE);
+ return;
+ }
+ BUG_ON(holder_cpu >= nr_cpu_ids);
+ yield_count = be32_to_cpu(lppaca_of(holder_cpu).yield_count);
+ if ((yield_count & 1) == 0)
+ return; /* virtual cpu is currently running */
+ rmb();
+ plpar_hcall_norets(H_CONFER,
+ get_hard_smp_processor_id(holder_cpu), yield_count)...
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 |