li guang <lig.f...@cn.fujitsu.com> writes:
> 在 2012-10-24三的 02:43 -0700，tip-bot for Paul Turner写道：
>> + do {
>> + if (runnable)
>> + sa->runnable_avg_sum += delta_w;
>> + sa->runnable_avg_period += delta_w;
>> +
>> + /*
>> + * Remainder of delta initiates a new period, roll over
>> + * the previous.
>> + */
>> + sa->runnable_avg_sum =
>> + decay_load(sa->runnable_avg_sum, 1);
>
> Is this u0+u1*y+u2*y^2+u3*y^3 ...,
> seems no, this is u0+u1*y+u2*y+u3*y+u4*y ...
>
It is cumulative, so it is u0+y*(u1+y*(u2+..., which is u0+u1*y+u2*y^2+...
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