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DateFri, 08 Sep 2006 11:26:34 +0400
FromPavel Emelianov <>
SubjectRe: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory)
Chandra Seetharaman wrote:
> On Thu, 2006-09-07 at 11:29 +0400, Pavel Emelianov wrote:
> <snip>
>
> 
>>>> BUT: I remind you the talks at OKS/OLS and in previous UBC discussions.
>>>> It was noted that having a separate interfaces for CPU, I/O bandwidth
>>>> 
>>>> 
>>> But, it will be lot simpler for the user to configure/use if they are
>>> together. We should discuss this also.
>>> 
>>> 
>> IMHO such unification may only imply that one syscall is used to pass
>> configuration info into kernel.
>> Each controller has specific configurating parameters different from the
>> other ones. E.g. CPU controller must assign a "weight" to each group to
>> share CPU time accordingly, but what is a "weight" for memory controller?
>> IO may operate on "bandwidth" and it's not clear what is a "bandwidth" in
>> Kb/sec for CPU controller and so on.
>> 
>
> CKRM/RG handles this by eliminating the units from the interface and
> abstracting them to be "shares". Each resource controller converts the
> shares to its own units and handles properly. 
> 
That's what I'm talking about - common syscall/ioct/etc and each controller
parses its input itself. That's OK for us.

[snip]
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