Hi Mulyadi :)

On 14 September 2011 12:44, Mulyadi Santosa [off-list ref] wrote:

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From what I understand: In case (1), the kernel code executes in the

context of the application, so the CPU cycles are accounted directly
to process that called write() (or send/sendto).

excellent thinking, however AFAIK sometimes (or most of the times
now?) data sending is done in asynchronous style..... so the counting
might be not so accurate since we don't really know how much the data
that are transmitted...

Ah I completely forgot asynchronous case.  Thanks for pointing it out!

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But in case (2),

excellent thinking..... ?I place my bet on ksoftirqd

Thanks.  I think it makes sense.   Let me think of a way to actually
confirm this.  If you know of a way, do chip in :-)

thanks,
-- 
Vimal