Messages in this thread Patch in this message | | | Date | Thu, 20 Aug 2009 15:40:13 +0200 | From | Andreas Herrmann <> | Subject | [PATCH 9/15] sched: Check sched_mn_power_savings when setting flags for CPU and MN domains |
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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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