* The core in which NAPI is using
@ 2011-08-26 11:36 J.Hwan Kim
2011-08-27 2:04 ` Mulyadi Santosa
0 siblings, 1 reply; 2+ messages in thread
From: J.Hwan Kim @ 2011-08-26 11:36 UTC (permalink / raw)
To: kernelnewbies
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
^ permalink raw reply [flat|nested] 2+ messages in thread
* The core in which NAPI is using
2011-08-26 11:36 The core in which NAPI is using J.Hwan Kim
@ 2011-08-27 2:04 ` Mulyadi Santosa
0 siblings, 0 replies; 2+ messages in thread
From: Mulyadi Santosa @ 2011-08-27 2:04 UTC (permalink / raw)
To: kernelnewbies
Hi..
On Fri, Aug 26, 2011 at 18:36, J.Hwan Kim <frog1120@gmail.com> wrote:
> 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?
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
training: mulyaditraining.blogspot.com
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2011-08-26 11:36 The core in which NAPI is using J.Hwan Kim
2011-08-27 2:04 ` Mulyadi Santosa
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