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Subject[PATCH 9/15] sched: Check sched_mn_power_savings when setting flags for CPU and MN domains

Use new function sd_balance_for_mn_power() and adapt
sd_balance_for_package_power() and sd_power_saving_flags() for correct
setting of flags SD_POWERSAVINGS_BALANCE and SD_BALANCE_NEWIDLE in CPU
and MN domains.

Furthermore add flag SD_SHARE_PKG_RESOURCES to MN domain.
Rational: a multi-node processor most likely shares package resources
(on Magny-Cours the package constitues a "voltage domain").

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
---
arch/x86/include/asm/topology.h | 3 ++-
include/linux/sched.h | 14 ++++++++++++--
2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 6d7d133..4a520b8 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -198,7 +198,8 @@ static inline void setup_node_to_cpumask_map(void) { }
| SD_BALANCE_EXEC \
| SD_WAKE_AFFINE \
| SD_WAKE_BALANCE \
- | sd_balance_for_package_power()\
+ | SD_SHARE_PKG_RESOURCES\
+ | sd_balance_for_mn_power()\
| sd_power_saving_flags(),\
.last_balance = jiffies, \
.balance_interval = 1, \
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5755643..c53bdd8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -844,9 +844,18 @@ static inline int sd_balance_for_mc_power(void)
return 0;
}

+static inline int sd_balance_for_mn_power(void)
+{
+ if (sched_mc_power_savings || sched_smt_power_savings)
+ return SD_POWERSAVINGS_BALANCE;
+
+ return 0;
+}
+
static inline int sd_balance_for_package_power(void)
{
- if (sched_mc_power_savings | sched_smt_power_savings)
+ if (sched_mn_power_savings || sched_mc_power_savings ||
+ sched_smt_power_savings)
return SD_POWERSAVINGS_BALANCE;

return 0;
@@ -860,7 +869,8 @@ static inline int sd_balance_for_package_power(void)

static inline int sd_power_saving_flags(void)
{
- if (sched_mc_power_savings | sched_smt_power_savings)
+ if (sched_mn_power_savings || sched_mc_power_savings ||
+ sched_smt_power_savings)
return SD_BALANCE_NEWIDLE;

return 0;
--
1.6.0.4




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