默认情况下，当节点是自权重时，就会有5050个非冗余权重，否则就只有4950个。
When nodes are self-weighted, which is the default, then there are 5050 non-redundant weights, else there are just 4950.
使用正常的轮循调度时，指定的权重会出现冗余(因为默认的权重总是1)。
The weights specified are superfluous when using normal round robin scheduling (as the default weight is always 1).
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