Messages in this thread Patch in this message | | | From | Arseniy Krasnov <> | Subject | [PATCH 02/13] hperf_hmp: introduce hew domain flag. | Date | Fri, 06 Nov 2015 15:02:36 +0300 |
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New scheduler domain type: HMP. Each big.LITTLE cluster is detected by scheduler as HMP domain. HPERF_HMP logic works between two HMP domains, the default CFS logic, in turn, works inside the HMP domain.
Signed-off-by: Tarek Dakhran <t.dakhran@samsung.com> Signed-off-by: Sergey Dyasly <s.dyasly@samsung.com> Signed-off-by: Dmitriy Safonov <d.safonov@partner.samsung.com> Signed-off-by: Arseniy Krasnov <a.krasnov@samsung.com> Signed-off-by: Ilya Maximets <i.maximets@samsung.com> --- arch/arm/kernel/topology.c | 6 +++++- include/linux/sched.h | 4 ++++ kernel/sched/core.c | 9 ++++++++- 3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index 08b7847..7fcc5fe 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -285,7 +285,11 @@ static struct sched_domain_topology_level arm_topology[] = { { cpu_corepower_mask, cpu_corepower_flags, SD_INIT_NAME(GMC) }, { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) }, #endif - { cpu_cpu_mask, SD_INIT_NAME(DIE) }, + { cpu_cpu_mask, +#ifdef CONFIG_HPERF_HMP + .flags = SD_HMP_BALANCE, +#endif + SD_INIT_NAME(DIE)}, { NULL, }, }; diff --git a/include/linux/sched.h b/include/linux/sched.h index b7b9501..eb084df 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -990,6 +990,10 @@ extern void wake_up_q(struct wake_q_head *head); #define SD_OVERLAP 0x2000 /* sched_domains of this level overlap */ #define SD_NUMA 0x4000 /* cross-node balancing */ +#ifdef CONFIG_HPERF_HMP +#define SD_HMP_BALANCE 0x8000 /* Use HMP load balancing algorithm */ +#endif + #ifdef CONFIG_SCHED_SMT static inline int cpu_smt_flags(void) { diff --git a/kernel/sched/core.c b/kernel/sched/core.c index bcd214e..16092e0 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6410,6 +6410,9 @@ sd_init(struct sched_domain_topology_level *tl, int cpu) | 0*SD_PREFER_SIBLING | 0*SD_NUMA | sd_flags +#ifdef CONFIG_HPERF_HMP + | (tl->flags & SD_HMP_BALANCE) +#endif , .last_balance = jiffies, @@ -6472,7 +6475,11 @@ static struct sched_domain_topology_level default_topology[] = { #ifdef CONFIG_SCHED_MC { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) }, #endif - { cpu_cpu_mask, SD_INIT_NAME(DIE) }, + { cpu_cpu_mask, +#ifdef CONFIG_HPERF_HMP + .flags = SD_HMP_BALANCE, +#endif + SD_INIT_NAME(DIE)}, { NULL, }, }; -- 1.9.1
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