linux-kernel - Fwd: Delivery Status Notification (Failure)

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Message-ID: <CAMj-D2Bvj2jmBagZArZTMr9EpGoQe+h2PHNFzT4UiC6ci9HhgQ@mail.gmail.com>
Date:   Wed, 28 Sep 2016 21:58:57 +0800
From:   gengdongjiu <gengdj.1984@...il.com>
To:     linux-kernel@...r.kernel.org
Subject: Fwd: Delivery Status Notification (Failure)

Hi,
  In the kernel 4.1, I am confused for the
runnable_avg_sum/avg_period/running_avg_sum,
for example below code.
Does the task runnable_avg_sum includes running_avg_sum? Does avg_period
includes the task runnable_avg_sum and the task sleep time? thank you.

static inline void __update_task_entity_contrib(struct sched_entity *se)
{
        u32 contrib;

        /* avoid overflowing a 32-bit type w/ SCHED_LOAD_SCALE */
        contrib = se->avg.runnable_avg_sum * scale_load_down(se->load.
weight);
        contrib /= (se->avg.avg_period + 1);
        se->avg.load_avg_contrib = scale_load(contrib);
}


static inline void __update_task_entity_utilization(struct sched_entity *se)
{
        u32 contrib;

        /* avoid overflowing a 32-bit type w/ SCHED_LOAD_SCALE */
        contrib = se->avg.running_avg_sum * scale_load_down(SCHED_LOAD_
SCALE);
        contrib /= (se->avg.avg_period + 1);
        se->avg.utilization_avg_contrib = scale_load(contrib);
}