Tracking down high CPU core utilisation

I have a system with 24 cores and for some reason only the first core is at 100% utilisation while the others are in the range of 20-25%.

I would like to get all processes that are running on the first core. The OS is Debian 6.0.

Answer

You can use the great command top. If a process only use one core it is because this process dont support multicore.

Attribution
Source : Link , Question Author : Jefi , Answer Author : Brigo

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