CPU usage accounting
j.vimal at gmail.com
Thu Sep 15 09:19:58 EDT 2011
Hi Mulyadi :)
On 14 September 2011 12:44, Mulyadi Santosa <mulyadi.santosa at gmail.com> wrote:
>> >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!
>>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 :-)
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