[TEST/REVIEW] CPU accounting patches

[Scott Long]

Poul-Henning Kamp wrote:

> In message <20060125201450.GE25397 at cirb503493.alcatel.com.au>, Peter Jeremy wri
> tes:
> 
>>On Wed, 2006-Jan-25 20:09:54 +0100, Poul-Henning Kamp wrote:
>>
>>>We are therefore forced to try to divine the intent behind the text,
>>>and as somebody who were around back in the eighties I can testify
>>>that the intent was to be able to bill computer users for CPU
>>>instructions.
>>
>>This implies that RDTSC (and equivalents) would be the best source of
>>accounting information, with CPU usage billed in CPU cycles used.
>>It's just users who expect to be billed in seconds.
> 
> 
> Right, so we bill users in "full speed CPU second equvivalents"
> 

Regardless of the technical merits of one accounting method or another,
changing the results of rusage is going to result in many years of
questions to the mailing lists and grumbling from uneducated sysadmins
that FreeBSD is somehow inferior because of this one detail.  I know
that's an emotional argument and not a technical one, but it's also
important to consider.

Scott