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Re: Re: [RFC][PATCH 1/7] Resource counters [message #11081 is a reply to message #10908]

Tue, 13 March 2007 09:36

dev
Messages: 1693
Registered: September 2005
Location: Moscow

Senior Member

>> - doesn't store the accounted value but
>> limit - accounted (i.e. the free resource)
>> - uses atomic_add_return()
>> - when negative, an error is returned and
>> the resource amount is added back
>>
>>changes to the limit have to adjust the 'current'
>>value too, but that is again simple and atomic
>>
>>best,
>>Herbert
>>
>>PS: atomic_add_unless() didn't exist back then
>>(at least I think so) but that might be an option
>>too ...
>
>
> I think as far as having this discussion if you can remove that race
> people will be more willing to talk about what vserver does.
>
> That said anything that uses locks or atomic operations (finer grained locks)
> because of the cache line ping pong is going to have scaling issues on large
> boxes.

> So in that sense anything short of per cpu variables sucks at scale. That said
> I would much rather get a simple correct version without the complexity of
> per cpu counters, before we optimize the counters that much.
fully agree with it. We need to get a working version first.

FYI, in OVZ we recently added such optimizations: reserves like in TCP/IP,
e.g. for kmemsize, numfile these reserves are done on task-basis for
fast charges/uncharges w/o involving lock operations.
On task exit reserves are returned back to the beancounter.

As it demonstrated atomic counters can be replaced with
task-reserves on the next step.

Thanks,
Kirill

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[Message index]

		[RFC][PATCH 0/7] Resource controllers based on process containers By: xemul on Tue, 06 March 2007 14:42
		[RFC][PATCH 1/7] Resource counters By: xemul on Tue, 06 March 2007 14:47
		Re: [RFC][PATCH 1/7] Resource counters By: Balbir Singh on Wed, 07 March 2007 04:03
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Wed, 07 March 2007 07:17
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Fri, 09 March 2007 16:37
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Sun, 11 March 2007 09:01
		Re: [RFC][PATCH 1/7] Resource counters By: ebiederm on Sun, 11 March 2007 19:00
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Mon, 12 March 2007 01:16
		Re: [RFC][PATCH 1/7] Resource counters By: ebiederm on Tue, 13 March 2007 09:09
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Tue, 13 March 2007 09:27
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Tue, 13 March 2007 15:21
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Tue, 13 March 2007 15:41
		Re: [RFC][PATCH 1/7] Resource counters By: Srivatsa Vaddagiri on Tue, 13 March 2007 16:07
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Wed, 14 March 2007 07:12
		Re: [RFC][PATCH 1/7] Resource counters By: ebiederm on Thu, 15 March 2007 16:51
		Re: Re: [RFC][PATCH 1/7] Resource counters By: dev on Tue, 13 March 2007 09:36
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Tue, 13 March 2007 16:32
		[RFC][PATCH 2/7] RSS controller core By: xemul on Tue, 06 March 2007 14:53
		Re: [RFC][PATCH 2/7] RSS controller core By: Andrew Morton on Tue, 06 March 2007 22:00
		Re: [RFC][PATCH 2/7] RSS controller core By: dev on Sun, 11 March 2007 12:13
		Re: [RFC][PATCH 2/7] RSS controller core By: Andrew Morton on Sun, 11 March 2007 12:51
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Sun, 11 March 2007 15:51
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Sun, 11 March 2007 19:34
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 01:00
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Mon, 12 March 2007 18:42
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 22:41
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Mon, 12 March 2007 09:02
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 21:11
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Tue, 13 March 2007 07:17
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 15:05
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Tue, 13 March 2007 15:32
		Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 15:10
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Kirill Korotaev on Mon, 12 March 2007 09:10
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Tue, 13 March 2007 09:26
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 15:30
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 10:06
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Andrew Morton on Tue, 13 March 2007 10:49
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 14:59
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Tue, 13 March 2007 17:05
		Re: [RFC][PATCH 2/7] RSS controller core By: mel on Wed, 14 March 2007 15:38
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Paul Menage on Sun, 18 March 2007 22:44
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Mon, 19 March 2007 17:41
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Fri, 09 March 2007 16:48
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Sun, 11 March 2007 09:08
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Sun, 11 March 2007 14:32
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Sun, 11 March 2007 15:04
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 00:41
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Mon, 12 March 2007 08:31
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Mon, 12 March 2007 09:55
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 23:43
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Tue, 13 March 2007 01:57
		Re: [RFC][PATCH 2/7] RSS controller core By: Srivatsa Vaddagiri on Tue, 13 March 2007 02:24
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 16:06
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Wed, 07 March 2007 05:37
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Wed, 07 March 2007 07:25
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Mon, 12 March 2007 23:02
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Sun, 18 March 2007 16:58
		Re: [RFC][PATCH 2/7] RSS controller core By: akpm on Tue, 13 March 2007 06:04
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Tue, 13 March 2007 17:26
		Re: [RFC][PATCH 2/7] RSS controller core By: Alan Cox on Tue, 13 March 2007 19:09
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Fri, 16 March 2007 00:55
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Fri, 16 March 2007 16:31
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Fri, 16 March 2007 18:54
		Re: [RFC][PATCH 2/7] RSS controller core By: mel on Wed, 14 March 2007 16:47
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Tue, 13 March 2007 20:28
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 15:11
		Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 15:54
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Wed, 14 March 2007 20:42
		Re: [RFC][PATCH 2/7] RSS controller core By: mel on Tue, 20 March 2007 18:57
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Fri, 16 March 2007 19:46
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Sun, 18 March 2007 17:42
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 19 March 2007 15:48
		controlling mmap()'d vs read/write() pages By: Dave Hansen on Tue, 20 March 2007 16:15
		Re: controlling mmap()'d vs read/write() pages By: ebiederm on Tue, 20 March 2007 21:19
		Re: controlling mmap()'d vs read/write() pages By: Herbert Poetzl on Fri, 23 March 2007 00:51
		Re: controlling mmap()'d vs read/write() pages By: Nick Piggin on Fri, 23 March 2007 05:57
		Re: controlling mmap()'d vs read/write() pages By: ebiederm on Fri, 23 March 2007 10:12
		Re: controlling mmap()'d vs read/write() pages By: Dave Hansen on Fri, 23 March 2007 16:41
		Re: controlling mmap()'d vs read/write() pages By: Herbert Poetzl on Fri, 23 March 2007 18:16
		Re: controlling mmap()'d vs read/write() pages By: Balbir Singh on Wed, 28 March 2007 09:18
		Re: controlling mmap()'d vs read/write() pages By: Nick Piggin on Fri, 23 March 2007 10:47
		Re: controlling mmap()'d vs read/write() pages By: ebiederm on Fri, 23 March 2007 12:21
		Re: controlling mmap()'d vs read/write() pages By: Nick Piggin on Wed, 28 March 2007 07:33
		[RFC][PATCH 3/7] Data structures changes for RSS accounting By: xemul on Tue, 06 March 2007 14:55
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: ebiederm on Sun, 11 March 2007 19:13
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: dev on Mon, 12 March 2007 16:16
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: Dave Hansen on Mon, 12 March 2007 16:48
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: xemul on Mon, 12 March 2007 17:19
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: Balbir Singh on Mon, 12 March 2007 17:21
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: Dave Hansen on Mon, 12 March 2007 17:27
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: xemul on Tue, 13 March 2007 07:10
		[RFC][PATCH 4/7] RSS accounting hooks over the code By: xemul on Tue, 06 March 2007 14:57
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: xemul on Wed, 14 March 2007 15:43
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Cedric Le Goater on Wed, 14 March 2007 15:37
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Sun, 11 March 2007 19:14
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: dev on Mon, 12 March 2007 16:23
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Dave Hansen on Mon, 12 March 2007 16:50
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: dev on Mon, 12 March 2007 17:07
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Herbert Poetzl on Mon, 12 March 2007 23:54
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Tue, 13 March 2007 09:58
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Tue, 13 March 2007 10:25
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Ethan Solomita on Wed, 28 March 2007 20:15
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Dave Hansen on Mon, 12 March 2007 17:33
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Tue, 13 March 2007 09:43
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Tue, 13 March 2007 16:01
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Wed, 14 March 2007 03:51
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Balbir Singh on Wed, 14 March 2007 06:42
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Wed, 14 March 2007 06:57
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Balbir Singh on Wed, 14 March 2007 07:48
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Vaidyanathan Srinivas on Wed, 14 March 2007 13:25
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Wed, 14 March 2007 13:49
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: dev on Wed, 14 March 2007 16:16
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Thu, 15 March 2007 05:01
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Vaidyanathan Srinivas on Wed, 14 March 2007 14:43
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Balbir Singh on Thu, 15 March 2007 05:44
		[RFC][PATCH 5/7] Per-container OOM killer and page reclamation By: xemul on Tue, 06 March 2007 15:01
		Re: [RFC][PATCH 5/7] Per-container OOM killer and page reclamation By: Balbir Singh on Fri, 09 March 2007 21:21
		Re: [RFC][PATCH 5/7] Per-container OOM killer and page reclamation By: xemul on Sun, 11 March 2007 08:39
		[RFC][PATCH 6/7] Account for the number of tasks within container By: xemul on Tue, 06 March 2007 15:02
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: Paul Menage on Wed, 07 March 2007 02:00
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: xemul on Wed, 07 March 2007 07:10
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: Paul Menage on Thu, 08 March 2007 13:49
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: xemul on Sun, 11 March 2007 08:34
		[RFC][PATCH 7/7] Account for the number of files opened within container By: xemul on Tue, 06 March 2007 15:05
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: Paul Menage on Wed, 07 March 2007 02:02
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: xemul on Wed, 07 March 2007 07:27
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: Balbir Singh on Wed, 07 March 2007 06:52
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: xemul on Wed, 07 March 2007 07:30
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: dev on Wed, 07 March 2007 09:30

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