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QEMU load average vs cpu count

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When I configure more CPU cores, the load average in my Guest OS as shown by top also increases linearly.

I'm trying to understand why this happens, because I expected either the opposite or at least for it to stay the same. As load average should be calculated independantly of the amount of cores?

For example, with 4 vCPU using -smp 4 the load average of my guest is around 2.60. If I decrease to 2 vCPU, the load average drops to around 1.30.

Does anyone have a logical explanation why this happening?

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