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Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) [message #6224 is a reply to message #6172]

Tue, 12 September 2006 10:40

Pavel Emelianov
Messages: 1149
Registered: September 2006

Senior Member

Balbir Singh wrote:
> Pavel Emelianov wrote:
>> Balbir Singh wrote:
>>> Pavel Emelianov wrote:
>>>> Balbir Singh wrote:
>>>>> Dave Hansen wrote:
>>>>>> On Fri, 2006-09-08 at 11:33 +0400, Pavel Emelianov wrote:
>>>>>>> I'm afraid we have different understandings of what a
>>>>>>> "guarantee" is.
>>>>>> It appears so.
>>>>>>
>>>>>>> Don't we?
>>>>>>> Guarantee may be one of
>>>>>>>
>>>>>>> 1. container will be able to touch that number of pages
>>>>>>> 2. container will be able to sys_mmap() that number of pages
>>>>>>> 3. container will not be killed unless it touches that number of
>>>>>>> pages
>>>>>> A "death sentence" guarantee? I like it. :)
>>>>>>
>>>>>>> 4. anything else
>>>>>>>
>>>>>>> Let's decide what kind of a guarantee we want.
>>>>> I think of guarantees w.r.t resources as the lower limit on the
>>>>> resource.
>>>>> Guarantees and limits can be thought of as the range (guarantee,
>>>>> limit]
>>>>> for the usage of the resource.
>>>>>
>>>>>> I think of it as: "I will be allowed to use this many total
>>>>>> pages, and
>>>>>> they are guaranteed not to fail." (1), I think. The sum of all of
>>>>>> the
>>>>>> system's guarantees must be less than or equal to the amount of free
>>>>>> memory on the machine.
>>>>> Yes, totally agree.
>>>> Such a guarantee is really a limit and this limit is even harder than
>>>> BC's one :)
>>>>
>>>> E.g. I have a node with 1Gb of ram and 10 containers with 100Mb
>>>> guarantee each.
>>>> I want to start one more. What shall I do not to break guarantees?
>>> Don't start the new container or change the guarantees of the existing
>>> ones
>>> to accommodate this one :) The QoS design (done by the administrator)
>>> should
>>> take care of such use-cases. It would be perfectly ok to have a
>>> container
>>> that does not care about guarantees to set their guarantee to 0 and set
>>> their limit to the desired value. As Chandra has been stating we
>>> need two
>>> parameters (guarantee, limit), either can be optional, but not both.
>> If I set up 9 groups to have 100Mb limit then I have 100Mb assured (on
>> 1Gb node)
>> for the 10th one exactly. And I do not have to set up any guarantee as
>> it won't affect
>> anything. So what a guarantee parameter is needed for?
>
> This use case works well for providing guarantee to one container.
> What if
> I want guarantees of 100Mb and 200Mb for two containers? How do I setup
> the system using limits?
You may set any value from 100 up to 800 Mb for the first one and
200-900Mb for
the second. In case of no other groups first will receive its 100Mb for
sure and
so does the second. If there are other groups - their guarantees should
be concerned.
>
> Even I restrict everyone else to 700Mb. With this I cannot be sure that
> the remaining 300Mb will be distributed as 100Mb and 200Mb.
There's no "everyone else" here - we're talking about a "static" case.
When new group arrives we need to recalculate guarantees as you said.
And here's my next question - what to do if the new guarantee would become
lower that current amount of unreclaimable memory in BC?

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[Message index]

		[PATCH] BC: resource beancounters (v4) (added user memory) By: dev on Tue, 05 September 2006 14:59
		[PATCH 1/13] BC: introduce atomic_dec_and_lock_irqsave() By: dev on Tue, 05 September 2006 15:16
		[PATCH 2/13] BC: kconfig By: dev on Tue, 05 September 2006 15:16
		[PATCH 3/17] BC: beancounters core (API) By: dev on Tue, 05 September 2006 15:17
		[PATCH 4/13] BC: context inheriting and changing By: dev on Tue, 05 September 2006 15:19
		[PATCH 5/13] BC: user interface (syscalls) By: dev on Tue, 05 September 2006 15:21
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: Balbir Singh on Tue, 05 September 2006 16:04
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: Pavel Emelianov on Wed, 06 September 2006 08:29
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: Balbir Singh on Wed, 06 September 2006 08:57
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: Pavel Emelianov on Wed, 06 September 2006 10:42
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: Balbir Singh on Wed, 06 September 2006 13:23
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: Balbir Singh on Wed, 06 September 2006 13:45
		Re: [ckrm-tech] [PATCH 5/13] BC: user interface (syscalls) By: dev on Wed, 06 September 2006 14:20
		[PATCH 6/13] BC: kernel memory (core) By: dev on Tue, 05 September 2006 15:21
		[PATCH 7/13] BC: kernel memory (marks) By: dev on Tue, 05 September 2006 15:23
		Re: [PATCH 7/13] BC: kernel memory (marks) By: Cedric Le Goater on Wed, 06 September 2006 14:19
		[PATCH 8/13] BC: locked pages (core) By: dev on Tue, 05 September 2006 15:24
		[PATCH 9/13] BC: locked pages (charge hooks) By: dev on Tue, 05 September 2006 15:25
		Re: [PATCH 9/13] BC: locked pages (charge hooks) By: Nick Piggin on Wed, 06 September 2006 03:43
		Re: [PATCH 9/13] BC: locked pages (charge hooks) By: Pavel Emelianov on Wed, 06 September 2006 08:45
		Re: [PATCH 9/13] BC: locked pages (charge hooks) By: Nick Piggin on Wed, 06 September 2006 09:41
		Re: [ckrm-tech] [PATCH 9/13] BC: locked pages (charge hooks) By: dev on Wed, 06 September 2006 14:16
		[PATCH 10/13] BC: privvm pages By: dev on Tue, 05 September 2006 15:26
		[PATCH 11/13] BC: vmrss (preparations) By: dev on Tue, 05 September 2006 15:28
		Re: [PATCH 11/13] BC: vmrss (preparations) By: Cedric Le Goater on Tue, 05 September 2006 22:09
		Re: [PATCH 11/13] BC: vmrss (preparations) By: dev on Wed, 06 September 2006 13:56
		Re: [ckrm-tech] [PATCH 11/13] BC: vmrss (preparations) By: Balbir Singh on Thu, 07 September 2006 16:28
		[PATCH 12/13] BC: vmrss (core) By: dev on Tue, 05 September 2006 15:28
		[PATCH 13/13] BC: vmrss (charges) By: dev on Tue, 05 September 2006 15:29
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Tue, 05 September 2006 16:53
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Wed, 06 September 2006 08:34
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: dev on Wed, 06 September 2006 13:04
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Wed, 06 September 2006 19:17
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 06 September 2006 22:06
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Thu, 07 September 2006 03:08
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Fri, 08 September 2006 07:33
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Dave Hansen on Fri, 08 September 2006 15:43
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Fri, 08 September 2006 18:26
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Mon, 11 September 2006 06:56
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Mon, 11 September 2006 07:54
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Mon, 11 September 2006 08:13
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Mon, 11 September 2006 08:19
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 12 September 2006 10:40
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Tue, 12 September 2006 12:01
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Wed, 13 September 2006 13:39
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 12 September 2006 10:39
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Mon, 11 September 2006 10:21
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 12 September 2006 10:35
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 11 September 2006 18:49
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 12 September 2006 10:48
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Tue, 12 September 2006 23:58
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Wed, 13 September 2006 08:06
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Wed, 13 September 2006 12:15
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Wed, 13 September 2006 13:35
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 13 September 2006 22:31
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Thu, 14 September 2006 07:53
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Thu, 14 September 2006 08:06
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Thu, 14 September 2006 13:02
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Fri, 15 September 2006 00:02
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Fri, 15 September 2006 07:21
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: dev on Fri, 15 September 2006 08:46
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 18 September 2006 23:51
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Thu, 14 September 2006 23:42
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Fri, 15 September 2006 07:15
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: dev on Fri, 15 September 2006 08:51
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Fri, 15 September 2006 11:15
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Mon, 18 September 2006 08:25
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Mon, 18 September 2006 08:56
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Mon, 18 September 2006 11:20
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Mon, 18 September 2006 11:32
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Tue, 19 September 2006 00:05
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 19 September 2006 08:04
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Mon, 18 September 2006 11:27
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Mon, 18 September 2006 12:37
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Tue, 19 September 2006 00:08
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 19 September 2006 08:06
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 18 September 2006 23:48
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 11 September 2006 18:44
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: dev on Fri, 15 September 2006 08:53
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 18 September 2006 23:57
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Fri, 08 September 2006 19:23
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Fri, 08 September 2006 21:43
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 11 September 2006 18:25
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Mon, 11 September 2006 19:10
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 11 September 2006 19:42
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Mon, 11 September 2006 23:58
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Tue, 12 September 2006 09:53
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Tue, 12 September 2006 23:54
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Wed, 13 September 2006 00:39
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 13 September 2006 01:10
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Wed, 13 September 2006 01:25
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Wed, 13 September 2006 04:41
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 13 September 2006 22:20
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Thu, 14 September 2006 01:22
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Thu, 14 September 2006 23:13
		Re: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: kir on Mon, 11 September 2006 19:47
		Re: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Tue, 12 September 2006 00:28
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Tue, 12 September 2006 10:44
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Tue, 12 September 2006 17:22
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Tue, 12 September 2006 17:40
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 13 September 2006 00:02
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Wed, 13 September 2006 00:43
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 13 September 2006 01:13
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 06 September 2006 21:47
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Dave Hansen on Fri, 08 September 2006 15:33
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Dave Hansen on Tue, 05 September 2006 17:46
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Balbir Singh on Tue, 05 September 2006 18:28
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Wed, 06 September 2006 00:17
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Dave Hansen on Fri, 08 September 2006 15:30
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Rohit Seth on Fri, 08 September 2006 17:10
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Shailabh Nagar on Fri, 08 September 2006 17:26
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: dev on Wed, 06 September 2006 13:54
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Wed, 06 September 2006 21:54
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Thu, 07 September 2006 07:29
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Thu, 07 September 2006 19:16
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Fri, 08 September 2006 07:22
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Fri, 08 September 2006 19:07
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Mon, 11 September 2006 07:02
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Mon, 11 September 2006 13:04
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 12 September 2006 10:24
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Tue, 12 September 2006 10:29
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Tue, 12 September 2006 11:06
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Srivatsa Vaddagiri on Tue, 12 September 2006 12:04
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Mon, 11 September 2006 18:47
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Thu, 07 September 2006 19:29
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Pavel Emelianov on Fri, 08 September 2006 07:26
		Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory) By: Chandra Seetharaman on Fri, 08 September 2006 19:10

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