Soft interrupt in multi-core environment

Hi, everyone

When network card interrupts occur in multi-core system, what core is used by soft irq for network interrupts?
That is, for example, if the IRQ happens in core 0,
does the soft irq run on the same core ?
Is it possible for soft irq to use other core different from hard IRQ?

Thanks in advance.

Best Regards,
J.Hwan Kim

Hi Kim...

quite likely yes. This come from my understanding that IRQ processing sometimes use per core data structure, thus to maximize locality, using the same core would be the best choice.

theoritically yes, especially when it falls to be executed by ksoftirqd.

regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
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