Swarm baked with many computers, but at the last time, there is only one cpu to work?

Swarm baked with many computers, but at the last time, there is only one cpu to work? it take a long time to bake, how can I improve it?

I want to ask how can I make the swarm even more useful !

Sorry for my bad English,wish you can understand it! Thank you for your help!

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