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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.

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Why do you care? (Are you actually experiencing a performance problem?) -- Idle CPU is wasted CPU: An ideal system will always have 100% CPU utilization, with every core actively servicing a process (or the system's own needs)... –  voretaq7 Mar 21 '13 at 5:32
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1 Answer

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

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