[PATCH] sched: improve weight-array comments
improve the comments around the wmult array (which controls the weight of niced tasks). Clarify that to achieve a 10% difference in CPU utilization, a weight multiplier of 1.25 has to be used. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -736,7 +736,9 @@ static void update_curr_load(struct rq *rq, u64 now)
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*
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* The "10% effect" is relative and cumulative: from _any_ nice level,
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* if you go up 1 level, it's -10% CPU usage, if you go down 1 level
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* it's +10% CPU usage.
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* it's +10% CPU usage. (to achieve that we use a multiplier of 1.25.
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* If a task goes up by ~10% and another task goes down by ~10% then
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* the relative distance between them is ~25%.)
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*/
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static const int prio_to_weight[40] = {
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/* -20 */ 88818, 71054, 56843, 45475, 36380, 29104, 23283, 18626, 14901, 11921,
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