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    Subject[patch v7 20/21] sched: don't do power balance on share cpu power domain
    Date
    Packing tasks among such domain can't save power, just performance
    losing. So no power balance on them.

    Signed-off-by: Alex Shi <alex.shi@intel.com>
    ---
    kernel/sched/fair.c | 7 ++++---
    1 file changed, 4 insertions(+), 3 deletions(-)

    diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
    index 047a1b3..3a0284b 100644
    --- a/kernel/sched/fair.c
    +++ b/kernel/sched/fair.c
    @@ -3503,7 +3503,7 @@ static int get_cpu_for_power_policy(struct sched_domain *sd, int cpu,

    policy = get_sd_sched_balance_policy(sd, cpu, p, sds);
    if (policy != SCHED_POLICY_PERFORMANCE && sds->group_leader) {
    - if (wakeup)
    + if (wakeup && !(sd->flags & SD_SHARE_CPUPOWER))
    new_cpu = find_leader_cpu(sds->group_leader,
    p, cpu, policy);
    /* for fork balancing and a little busy task */
    @@ -4410,8 +4410,9 @@ static unsigned long task_h_load(struct task_struct *p)
    static inline void init_sd_lb_power_stats(struct lb_env *env,
    struct sd_lb_stats *sds)
    {
    - if (sched_balance_policy == SCHED_POLICY_PERFORMANCE ||
    - env->idle == CPU_NOT_IDLE) {
    + if (sched_balance_policy == SCHED_POLICY_PERFORMANCE
    + || env->sd->flags & SD_SHARE_CPUPOWER
    + || env->idle == CPU_NOT_IDLE) {
    env->flags &= ~LBF_POWER_BAL;
    env->flags |= LBF_PERF_BAL;
    return;
    --
    1.7.12


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