Messages in this thread | | | Subject | Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) | From | Dave Hansen <> | Date | Tue, 05 Sep 2006 10:46:32 -0700 |
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On Tue, 2006-09-05 at 19:02 +0400, Kirill Korotaev wrote: > Core Resource Beancounters (BC) + kernel/user memory control. > > BC allows to account and control consumption > of kernel resources used by group of processes.
Hi Kirill,
I've honestly lost track of these discussions along the way, so I hope you don't mind summarizing a bit.
Do these patches help with accounting for anything other than memory? Will we need new user/kernel interfaces for cpu, i/o bandwidth, etc...?
Have you given any thought to the possibility that a task might need to move between accounting contexts? That has certainly been a "requirement" pushed on to CKRM for a long time, and the need goes something like this:
1. A system runs a web server, which services several virtual domains 2. that web server receives a request for foo.com 3. the web server switches into foo.com's accounting context 4. the web server reads things from disk, allocates some memory, and makes a database request. 5. the database receives the request, and switches into foo.com's accounting context, and charges foo.com for its resource use etc...
So, the goal is to run _one_ copy of an application on a system, but account for its resources in a much more fine-grained way than at the application level.
I think we can probably use beancounters for this, if we do not worry about migrating _existing_ charges when we change accounting context. Does that make sense?
-- Dave
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