* Soft interrupt in multi-core environment
@ 2011-08-26 4:18 J.Hwan Kim
2011-08-26 5:58 ` Mulyadi Santosa
0 siblings, 1 reply; 2+ messages in thread
From: J.Hwan Kim @ 2011-08-26 4:18 UTC (permalink / raw)
To: kernelnewbies
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
^ permalink raw reply [flat|nested] 2+ messages in thread
* Soft interrupt in multi-core environment
2011-08-26 4:18 Soft interrupt in multi-core environment J.Hwan Kim
@ 2011-08-26 5:58 ` Mulyadi Santosa
0 siblings, 0 replies; 2+ messages in thread
From: Mulyadi Santosa @ 2011-08-26 5:58 UTC (permalink / raw)
To: kernelnewbies
Hi Kim...
On Fri, Aug 26, 2011 at 11:18, J.Hwan Kim <frog1120@gmail.com> wrote:
> Hi, everyonehttp://forum.detik.com/mundur-ini-dia-isi-surat-resign-steve-jobs-t287069.html
>
> 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 ?
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.
> Is it possible for soft irq to use other core different from hard IRQ?
theoritically yes, especially when it falls to be executed by ksoftirqd.
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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