diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0057-sched-Determine-the-current-sched_group-idle-state.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0057-sched-Determine-the-current-sched_group-idle-state.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0057-sched-Determine-the-current-sched_group-idle-state.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0057-sched-Determine-the-current-sched_group-idle-state.patch new file mode 100644 index 0000000..e1eec60 --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0057-sched-Determine-the-current-sched_group-idle-state.patch @@ -0,0 +1,76 @@ +From ee2bf33dc8d406cab7a0827d63ad3e41dd41c96e Mon Sep 17 00:00:00 2001 +From: Dietmar Eggemann <dietmar.eggemann@arm.com> +Date: Tue, 27 Jan 2015 14:04:17 +0000 +Subject: [PATCH 57/92] sched: Determine the current sched_group idle-state + +To estimate the energy consumption of a sched_group in +sched_group_energy() it is necessary to know which idle-state the group +is in when it is idle. For now, it is assumed that this is the current +idle-state (though it might be wrong). Based on the individual cpu +idle-states group_idle_state() finds the group idle-state. + +cc: Ingo Molnar <mingo@redhat.com> +cc: Peter Zijlstra <peterz@infradead.org> +Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> +Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> +(cherry picked from commit 2e5d2cd2670f7564bb38ec3984e3693da3f0470d) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + kernel/sched/fair.c | 25 +++++++++++++++++++++---- + 1 file changed, 21 insertions(+), 4 deletions(-) + +diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c +index dc1fca0..799e2b5 100644 +--- a/kernel/sched/fair.c ++++ b/kernel/sched/fair.c +@@ -5438,6 +5438,20 @@ static int find_new_capacity(struct energy_env *eenv, + return idx; + } + ++static int group_idle_state(struct sched_group *sg) ++{ ++ int i, state = INT_MAX; ++ ++ /* Find the shallowest idle state in the sched group. */ ++ for_each_cpu(i, sched_group_cpus(sg)) ++ state = min(state, idle_get_state_idx(cpu_rq(i))); ++ ++ /* Take non-cpuidle idling into account (active idle/arch_cpu_idle()) */ ++ state++; ++ ++ return state; ++} ++ + /* + * sched_group_energy(): Computes the absolute energy consumption of cpus + * belonging to the sched_group including shared resources shared only by +@@ -5490,7 +5504,8 @@ static int sched_group_energy(struct energy_env *eenv) + + do { + unsigned long group_util; +- int sg_busy_energy, sg_idle_energy, cap_idx; ++ int sg_busy_energy, sg_idle_energy; ++ int cap_idx, idle_idx; + + if (sg_shared_cap && sg_shared_cap->group_weight >= sg->group_weight) + eenv->sg_cap = sg_shared_cap; +@@ -5498,11 +5513,13 @@ static int sched_group_energy(struct energy_env *eenv) + eenv->sg_cap = sg; + + cap_idx = find_new_capacity(eenv, sg->sge); ++ idle_idx = group_idle_state(sg); + group_util = group_norm_util(eenv, sg); + sg_busy_energy = (group_util * sg->sge->cap_states[cap_idx].power) +- >> SCHED_CAPACITY_SHIFT; +- sg_idle_energy = ((SCHED_CAPACITY_SCALE-group_util) * sg->sge->idle_states[0].power) +- >> SCHED_CAPACITY_SHIFT; ++ >> SCHED_CAPACITY_SHIFT; ++ sg_idle_energy = ((SCHED_CAPACITY_SCALE-group_util) ++ * sg->sge->idle_states[idle_idx].power) ++ >> SCHED_CAPACITY_SHIFT; + + total_energy += sg_busy_energy + sg_idle_energy; + +-- +1.9.1 + |