diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch new file mode 100644 index 0000000..546ac07 --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0052-sched-Highest-energy-aware-balancing-sched_domain-le.patch @@ -0,0 +1,76 @@ +From a90c8ec93f298cccfbc4db29a8513675002da326 Mon Sep 17 00:00:00 2001 +From: Morten Rasmussen <morten.rasmussen@arm.com> +Date: Fri, 2 Jan 2015 17:08:52 +0000 +Subject: [PATCH 52/92] sched: Highest energy aware balancing sched_domain + level pointer + +Add another member to the family of per-cpu sched_domain shortcut +pointers. This one, sd_ea, points to the highest level at which energy +model is provided. At this level and all levels below all sched_groups +have energy model data attached. + +Partial energy model information is possible but restricted to providing +energy model data for lower level sched_domains (sd_ea and below) and +leaving load-balancing on levels above to non-energy-aware +load-balancing. For example, it is possible to apply energy-aware +scheduling within each socket on a multi-socket system and let normal +scheduling handle load-balancing between sockets. + +cc: Ingo Molnar <mingo@redhat.com> +cc: Peter Zijlstra <peterz@infradead.org> +Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> +(cherry picked from commit c4eb7a2b0a1908a377fb063ecae89d7bacd6aa78) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + kernel/sched/core.c | 10 ++++++++++ + kernel/sched/sched.h | 1 + + 2 files changed, 11 insertions(+) + +diff --git a/kernel/sched/core.c b/kernel/sched/core.c +index b450329..f2642d4 100644 +--- a/kernel/sched/core.c ++++ b/kernel/sched/core.c +@@ -6001,11 +6001,13 @@ static void destroy_sched_domains(struct sched_domain *sd) + DEFINE_PER_CPU(struct sched_domain_shared *, sd_llc_shared); + DEFINE_PER_CPU(struct sched_domain *, sd_numa); + DEFINE_PER_CPU(struct sched_domain *, sd_asym); ++DEFINE_PER_CPU(struct sched_domain *, sd_ea); + + static void update_top_cache_domain(int cpu) + { + struct sched_domain_shared *sds = NULL; + struct sched_domain *sd; ++ struct sched_domain *ea_sd = NULL; + int id = cpu; + int size = 1; + +@@ -6026,6 +6028,14 @@ static void update_top_cache_domain(int cpu) + + sd = highest_flag_domain(cpu, SD_ASYM_PACKING); + rcu_assign_pointer(per_cpu(sd_asym, cpu), sd); ++ ++ for_each_domain(cpu, sd) { ++ if (sd->groups->sge) ++ ea_sd = sd; ++ else ++ break; ++ } ++ rcu_assign_pointer(per_cpu(sd_ea, cpu), ea_sd); + } + + /* +diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h +index 46787bd..22b7cfd 100644 +--- a/kernel/sched/sched.h ++++ b/kernel/sched/sched.h +@@ -892,6 +892,7 @@ static inline struct sched_domain *lowest_flag_domain(int cpu, int flag) + DECLARE_PER_CPU(struct sched_domain_shared *, sd_llc_shared); + DECLARE_PER_CPU(struct sched_domain *, sd_numa); + DECLARE_PER_CPU(struct sched_domain *, sd_asym); ++DECLARE_PER_CPU(struct sched_domain *, sd_ea); + + struct sched_group_capacity { + atomic_t ref; +-- +1.9.1 + |