sched: Tweak wake_idx
When merging select_task_rq_fair() and sched_balance_self() we lost
the use of wake_idx, restore that and set them to 0 to make wake
balancing more aggressive.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/ia64/include/asm/topology.h b/arch/ia64/include/asm/topology.h
index cf6053b..47f3c51 100644
--- a/arch/ia64/include/asm/topology.h
+++ b/arch/ia64/include/asm/topology.h
@@ -62,11 +62,12 @@
.busy_idx = 2, \
.idle_idx = 1, \
.newidle_idx = 2, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_NEWIDLE \
| SD_BALANCE_EXEC \
+ | SD_BALANCE_FORK \
| SD_BALANCE_WAKE \
| SD_WAKE_AFFINE, \
.last_balance = jiffies, \
@@ -87,7 +88,7 @@
.busy_idx = 3, \
.idle_idx = 2, \
.newidle_idx = 2, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_EXEC \
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index c634331..a6b220a 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -58,9 +58,10 @@
.busy_idx = 3, \
.idle_idx = 1, \
.newidle_idx = 2, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_EXEC \
+ | SD_BALANCE_FORK \
| SD_BALANCE_NEWIDLE \
| SD_BALANCE_WAKE \
| SD_SERIALIZE, \
diff --git a/arch/sh/include/asm/topology.h b/arch/sh/include/asm/topology.h
index dc1531e..9054e5c 100644
--- a/arch/sh/include/asm/topology.h
+++ b/arch/sh/include/asm/topology.h
@@ -16,7 +16,7 @@
.busy_idx = 3, \
.idle_idx = 2, \
.newidle_idx = 2, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_FORK \
diff --git a/arch/sparc/include/asm/topology_64.h b/arch/sparc/include/asm/topology_64.h
index 1d091ab..bc3a093 100644
--- a/arch/sparc/include/asm/topology_64.h
+++ b/arch/sparc/include/asm/topology_64.h
@@ -52,7 +52,7 @@
.busy_idx = 3, \
.idle_idx = 2, \
.newidle_idx = 0, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = 1, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_FORK \
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 966d58dc..4b1b335 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -138,7 +138,7 @@
.busy_idx = 3, \
.idle_idx = SD_IDLE_IDX, \
.newidle_idx = SD_NEWIDLE_IDX, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = SD_FORKEXEC_IDX, \
\
.flags = 1*SD_LOAD_BALANCE \
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 6a8cd15..fef5704 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -120,7 +120,7 @@
.imbalance_pct = 125, \
.cache_nice_tries = 1, \
.busy_idx = 2, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = 1, \
\
.flags = 1*SD_LOAD_BALANCE \
@@ -152,7 +152,7 @@
.busy_idx = 2, \
.idle_idx = 1, \
.newidle_idx = 2, \
- .wake_idx = 1, \
+ .wake_idx = 0, \
.forkexec_idx = 1, \
\
.flags = 1*SD_LOAD_BALANCE \
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 8b3eddb..1959356 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1232,12 +1232,27 @@
* domain.
*/
static struct sched_group *
-find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
+find_idlest_group(struct sched_domain *sd, struct task_struct *p,
+ int this_cpu, int flag)
{
struct sched_group *idlest = NULL, *this = NULL, *group = sd->groups;
unsigned long min_load = ULONG_MAX, this_load = 0;
- int load_idx = sd->forkexec_idx;
int imbalance = 100 + (sd->imbalance_pct-100)/2;
+ int load_idx = 0;
+
+ switch (flag) {
+ case SD_BALANCE_FORK:
+ case SD_BALANCE_EXEC:
+ load_idx = sd->forkexec_idx;
+ break;
+
+ case SD_BALANCE_WAKE:
+ load_idx = sd->wake_idx;
+ break;
+
+ default:
+ break;
+ }
do {
unsigned long load, avg_load;
@@ -1392,7 +1407,7 @@
continue;
}
- group = find_idlest_group(sd, p, cpu);
+ group = find_idlest_group(sd, p, cpu, flag);
if (!group) {
sd = sd->child;
continue;