The core in which NAPI is using

Hi, everyone

My ethernet card always interrupts at Core 0 .
The driver of the device is using NAPI.
When NAPI is appled, does the core in which NAPI is processing vary? Is the NAPI triggered by software interrupt, isn't it?
My system monitor indicates the CPU loading varies randomly among 8 cores. Can you give an information if the core which NAPI is using varies?

Thanks in advance.

Best Regards,
J.Hwan Kim

Hi..

if you mean "software interrupt" is somekind of timer, then I think yes. Instead of relying on interrupt coming from the devices, NAPI uses (tight) polling in order to match the speed of incoming/outgoing packet bursts.

regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
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