From: paulmck@linux.vnet.ibm.com (Paul E. McKenney)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 00/10] mm: Linux VM Infrastructure to support Memory Power Management
Date: Fri, 10 Jun 2011 09:55:29 -0700 [thread overview]
Message-ID: <20110610165529.GC2230@linux.vnet.ibm.com> (raw)
In-Reply-To: <20110610155954.GA25774@srcf.ucam.org>
On Fri, Jun 10, 2011 at 04:59:54PM +0100, Matthew Garrett wrote:
> On Fri, Jun 10, 2011 at 08:11:21AM -0700, Paul E. McKenney wrote:
>
> > Of course, on a server, you could get similar results by having a very
> > large amount of memory (say 256GB) and a workload that needed all the
> > memory only occasionally for short periods, but could get by with much
> > less (say 8GB) the rest of the time. I have no idea whether or not
> > anyone actually has such a system.
>
> For the server case, the low hanging fruit would seem to be
> finer-grained self-refresh. At best we seem to be able to do that on a
> per-CPU socket basis right now. The difference between active and
> self-refresh would seem to be much larger than the difference between
> self-refresh and powered down.
By "finer-grained self-refresh" you mean turning off refresh for banks
of memory that are not being used, right? If so, this is supported by
the memory-regions support provided, at least assuming that the regions
can be aligned with the self-refresh boundaries.
Or am I missing your point?
Thanx, Paul
WARNING: multiple messages have this Message-ID (diff)
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Kyungmin Park <kmpark@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ankita Garg <ankita@in.ibm.com>,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
linux-pm@lists.linux-foundation.org, svaidy@linux.vnet.ibm.com,
thomas.abraham@linaro.org
Subject: Re: [PATCH 00/10] mm: Linux VM Infrastructure to support Memory Power Management
Date: Fri, 10 Jun 2011 09:55:29 -0700 [thread overview]
Message-ID: <20110610165529.GC2230@linux.vnet.ibm.com> (raw)
In-Reply-To: <20110610155954.GA25774@srcf.ucam.org>
On Fri, Jun 10, 2011 at 04:59:54PM +0100, Matthew Garrett wrote:
> On Fri, Jun 10, 2011 at 08:11:21AM -0700, Paul E. McKenney wrote:
>
> > Of course, on a server, you could get similar results by having a very
> > large amount of memory (say 256GB) and a workload that needed all the
> > memory only occasionally for short periods, but could get by with much
> > less (say 8GB) the rest of the time. I have no idea whether or not
> > anyone actually has such a system.
>
> For the server case, the low hanging fruit would seem to be
> finer-grained self-refresh. At best we seem to be able to do that on a
> per-CPU socket basis right now. The difference between active and
> self-refresh would seem to be much larger than the difference between
> self-refresh and powered down.
By "finer-grained self-refresh" you mean turning off refresh for banks
of memory that are not being used, right? If so, this is supported by
the memory-regions support provided, at least assuming that the regions
can be aligned with the self-refresh boundaries.
Or am I missing your point?
Thanx, Paul
WARNING: multiple messages have this Message-ID (diff)
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Kyungmin Park <kmpark@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ankita Garg <ankita@in.ibm.com>,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
linux-pm@lists.linux-foundation.org, svaidy@linux.vnet.ibm.com,
thomas.abraham@linaro.org
Subject: Re: [PATCH 00/10] mm: Linux VM Infrastructure to support Memory Power Management
Date: Fri, 10 Jun 2011 09:55:29 -0700 [thread overview]
Message-ID: <20110610165529.GC2230@linux.vnet.ibm.com> (raw)
In-Reply-To: <20110610155954.GA25774@srcf.ucam.org>
On Fri, Jun 10, 2011 at 04:59:54PM +0100, Matthew Garrett wrote:
> On Fri, Jun 10, 2011 at 08:11:21AM -0700, Paul E. McKenney wrote:
>
> > Of course, on a server, you could get similar results by having a very
> > large amount of memory (say 256GB) and a workload that needed all the
> > memory only occasionally for short periods, but could get by with much
> > less (say 8GB) the rest of the time. I have no idea whether or not
> > anyone actually has such a system.
>
> For the server case, the low hanging fruit would seem to be
> finer-grained self-refresh. At best we seem to be able to do that on a
> per-CPU socket basis right now. The difference between active and
> self-refresh would seem to be much larger than the difference between
> self-refresh and powered down.
By "finer-grained self-refresh" you mean turning off refresh for banks
of memory that are not being used, right? If so, this is supported by
the memory-regions support provided, at least assuming that the regions
can be aligned with the self-refresh boundaries.
Or am I missing your point?
Thanx, Paul
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next prev parent reply other threads:[~2011-06-10 16:55 UTC|newest]
Thread overview: 285+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-27 12:31 [PATCH 00/10] mm: Linux VM Infrastructure to support Memory Power Management Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 01/10] mm: Introduce the memory regions data structure Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 15:30 ` Dave Hansen
2011-05-27 15:30 ` Dave Hansen
2011-05-27 15:30 ` Dave Hansen
2011-05-27 15:30 ` Dave Hansen
2011-05-27 15:30 ` Dave Hansen
2011-05-27 18:20 ` Vaidyanathan Srinivasan
2011-05-27 18:20 ` Vaidyanathan Srinivasan
2011-05-27 18:20 ` Vaidyanathan Srinivasan
2011-05-27 21:31 ` Dave Hansen
2011-05-27 21:31 ` Dave Hansen
2011-05-27 21:31 ` Dave Hansen
2011-05-27 21:31 ` Dave Hansen
2011-05-29 8:16 ` Ankita Garg
2011-05-29 8:16 ` Ankita Garg
2011-05-29 8:16 ` Ankita Garg
2011-05-31 17:34 ` Dave Hansen
2011-05-31 17:34 ` Dave Hansen
2011-05-31 17:34 ` Dave Hansen
2011-05-31 17:34 ` Dave Hansen
2011-05-31 17:34 ` Dave Hansen
2011-06-02 8:54 ` Ankita Garg
2011-06-02 8:54 ` Ankita Garg
2011-06-02 8:54 ` Ankita Garg
2011-06-02 8:54 ` Ankita Garg
2011-05-29 8:16 ` Ankita Garg
2011-05-27 21:31 ` Dave Hansen
2011-05-27 21:31 ` Dave Hansen
2011-05-27 18:20 ` Vaidyanathan Srinivasan
2011-05-27 15:30 ` Dave Hansen
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 02/10] mm: Helper routines Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 03/10] mm: Init zones inside memory regions Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 04/10] mm: Refer to zones from " Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 05/10] mm: Create zonelists Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 06/10] mm: Verify zonelists Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 07/10] mm: Modify vmstat Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 08/10] mm: Modify vmscan Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 09/10] mm: Reflect memory region changes in zoneinfo Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` [PATCH 10/10] mm: Create memory regions at boot-up Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-27 12:31 ` Ankita Garg
2011-05-28 14:39 ` Jean-Christophe PLAGNIOL-VILLARD
2011-05-28 14:39 ` Jean-Christophe PLAGNIOL-VILLARD
2011-05-28 14:39 ` Jean-Christophe PLAGNIOL-VILLARD
2011-05-28 14:39 ` Jean-Christophe PLAGNIOL-VILLARD
2011-05-27 12:31 ` Ankita Garg
2011-05-28 7:56 ` [PATCH 00/10] mm: Linux VM Infrastructure to support Memory Power Management Andrew Morton
2011-05-28 7:56 ` Andrew Morton
2011-05-28 7:56 ` Andrew Morton
2011-05-28 13:16 ` Ankita Garg
2011-05-28 13:16 ` Ankita Garg
2011-05-28 13:16 ` Ankita Garg
2011-05-28 13:16 ` Ankita Garg
2011-06-09 18:52 ` Paul E. McKenney
2011-06-09 18:52 ` Paul E. McKenney
2011-06-09 18:52 ` Paul E. McKenney
2011-06-09 18:52 ` Paul E. McKenney
2011-06-10 0:51 ` Kyungmin Park
2011-06-10 0:51 ` Kyungmin Park
2011-06-10 0:51 ` Kyungmin Park
2011-06-10 15:11 ` Paul E. McKenney
2011-06-10 15:11 ` Paul E. McKenney
2011-06-10 15:11 ` Paul E. McKenney
2011-06-10 15:59 ` Matthew Garrett
2011-06-10 15:59 ` Matthew Garrett
2011-06-10 15:59 ` Matthew Garrett
2011-06-10 16:55 ` Paul E. McKenney [this message]
2011-06-10 16:55 ` Paul E. McKenney
2011-06-10 16:55 ` Paul E. McKenney
2011-06-10 17:05 ` Matthew Garrett
2011-06-10 17:05 ` Matthew Garrett
2011-06-10 17:05 ` Matthew Garrett
2011-06-10 17:19 ` Paul E. McKenney
2011-06-10 17:19 ` Paul E. McKenney
2011-06-10 17:19 ` Paul E. McKenney
2011-06-10 17:23 ` Matthew Garrett
2011-06-10 17:23 ` Matthew Garrett
2011-06-10 17:23 ` Matthew Garrett
2011-06-10 17:23 ` Matthew Garrett
2011-06-10 17:52 ` Paul E. McKenney
2011-06-10 17:52 ` Paul E. McKenney
2011-06-10 17:52 ` Paul E. McKenney
2011-06-10 18:08 ` Matthew Garrett
2011-06-10 18:08 ` Matthew Garrett
2011-06-10 18:08 ` Matthew Garrett
2011-06-10 18:08 ` Matthew Garrett
2011-06-10 18:47 ` Paul E. McKenney
2011-06-10 18:47 ` Paul E. McKenney
2011-06-10 18:47 ` Paul E. McKenney
2011-06-10 18:47 ` Paul E. McKenney
2011-06-10 19:23 ` Matthew Garrett
2011-06-10 19:23 ` Matthew Garrett
2011-06-10 19:23 ` Matthew Garrett
2011-06-10 19:23 ` Matthew Garrett
2011-06-10 19:37 ` Paul E. McKenney
2011-06-10 19:37 ` Paul E. McKenney
2011-06-10 19:37 ` Paul E. McKenney
2011-06-10 19:37 ` Paul E. McKenney
2011-06-10 20:12 ` Matthew Garrett
2011-06-10 20:12 ` Matthew Garrett
2011-06-10 20:12 ` Matthew Garrett
2011-06-10 20:12 ` Matthew Garrett
2011-06-11 3:02 ` Arjan van de Ven
2011-06-11 3:02 ` Arjan van de Ven
2011-06-11 3:02 ` Arjan van de Ven
2011-06-11 17:06 ` Paul E. McKenney
2011-06-11 17:06 ` Paul E. McKenney
2011-06-11 17:06 ` Paul E. McKenney
2011-06-11 17:26 ` Arjan van de Ven
2011-06-11 17:26 ` Arjan van de Ven
2011-06-11 17:26 ` Arjan van de Ven
2011-06-11 17:26 ` Arjan van de Ven
2011-06-12 23:07 ` Paul E. McKenney
2011-06-12 23:07 ` Paul E. McKenney
2011-06-12 23:07 ` Paul E. McKenney
2011-06-12 23:07 ` Paul E. McKenney
2011-06-13 14:28 ` Arjan van de Ven
2011-06-13 14:28 ` Arjan van de Ven
2011-06-13 14:28 ` Arjan van de Ven
2011-06-13 23:04 ` Paul E. McKenney
2011-06-13 23:04 ` Paul E. McKenney
2011-06-13 23:04 ` Paul E. McKenney
2011-06-13 23:04 ` Paul E. McKenney
2011-06-13 14:28 ` Arjan van de Ven
2011-06-11 17:06 ` Paul E. McKenney
2011-06-14 8:51 ` Ankita Garg
2011-06-14 8:51 ` Ankita Garg
2011-06-14 8:51 ` Ankita Garg
2011-06-14 8:51 ` Ankita Garg
2011-06-15 16:53 ` Ankita Garg
2011-06-15 16:53 ` Ankita Garg
2011-06-15 16:53 ` Ankita Garg
2011-06-15 16:53 ` Ankita Garg
2011-06-18 4:08 ` Arjan van de Ven
2011-06-18 4:08 ` Arjan van de Ven
2011-06-18 4:08 ` Arjan van de Ven
2011-06-18 4:08 ` Arjan van de Ven
2011-06-11 3:02 ` Arjan van de Ven
2011-06-10 17:52 ` Paul E. McKenney
2011-06-10 17:33 ` Ankita Garg
2011-06-10 17:33 ` Ankita Garg
2011-06-10 17:33 ` Ankita Garg
2011-06-10 17:33 ` Ankita Garg
2011-06-11 17:08 ` Paul E. McKenney
2011-06-11 17:08 ` Paul E. McKenney
2011-06-11 17:08 ` Paul E. McKenney
2011-06-11 17:08 ` Paul E. McKenney
2011-06-10 17:19 ` Paul E. McKenney
2011-06-10 17:05 ` Matthew Garrett
2011-06-10 16:55 ` Paul E. McKenney
2011-06-10 15:59 ` Matthew Garrett
2011-06-10 15:11 ` Paul E. McKenney
2011-06-10 0:51 ` Kyungmin Park
2011-07-12 5:31 ` amit kachhap
2011-07-12 5:31 ` amit kachhap
2011-07-12 5:31 ` amit kachhap
2011-07-12 5:31 ` amit kachhap
2011-05-28 7:56 ` Andrew Morton
2011-06-13 4:47 ` KAMEZAWA Hiroyuki
2011-06-13 4:47 ` KAMEZAWA Hiroyuki
2011-06-13 4:47 ` KAMEZAWA Hiroyuki
2011-06-16 4:20 ` Ankita Garg
2011-06-16 4:20 ` Ankita Garg
2011-06-16 4:20 ` Ankita Garg
2011-06-16 4:20 ` Ankita Garg
2011-06-16 9:12 ` KAMEZAWA Hiroyuki
2011-06-16 9:12 ` KAMEZAWA Hiroyuki
2011-06-16 9:12 ` KAMEZAWA Hiroyuki
2011-06-17 15:28 ` Ankita Garg
2011-06-17 15:28 ` Ankita Garg
2011-06-17 15:28 ` Ankita Garg
2011-06-17 15:28 ` Ankita Garg
2011-06-19 23:53 ` KAMEZAWA Hiroyuki
2011-06-19 23:53 ` KAMEZAWA Hiroyuki
2011-06-19 23:53 ` KAMEZAWA Hiroyuki
2011-06-19 23:53 ` KAMEZAWA Hiroyuki
2011-06-16 9:12 ` KAMEZAWA Hiroyuki
2011-06-16 16:04 ` Dave Hansen
2011-06-16 16:04 ` Dave Hansen
2011-06-16 16:04 ` Dave Hansen
2011-06-17 10:03 ` Ankita Garg
2011-06-17 10:03 ` Ankita Garg
2011-06-17 10:03 ` Ankita Garg
2011-06-17 10:03 ` Ankita Garg
2011-06-16 16:04 ` Dave Hansen
2011-06-13 4:47 ` KAMEZAWA Hiroyuki
2011-06-29 13:00 ` Ankita Garg
2011-06-29 13:00 ` Ankita Garg
2011-06-29 13:00 ` Ankita Garg
2011-06-29 13:00 ` Ankita Garg
2011-06-29 17:06 ` Dave Hansen
2011-06-29 17:06 ` Dave Hansen
2011-06-29 17:06 ` Dave Hansen
2011-06-29 17:42 ` Ankita Garg
2011-06-29 17:42 ` Ankita Garg
2011-06-29 17:42 ` Ankita Garg
2011-06-29 17:42 ` Ankita Garg
2011-06-29 17:59 ` Dave Hansen
2011-06-29 17:59 ` Dave Hansen
2011-06-29 17:59 ` Dave Hansen
2011-06-29 18:17 ` Vaidyanathan Srinivasan
2011-06-29 18:17 ` Vaidyanathan Srinivasan
2011-06-29 18:17 ` Vaidyanathan Srinivasan
2011-06-29 18:17 ` Vaidyanathan Srinivasan
2011-06-30 4:37 ` Ankita Garg
2011-06-30 4:37 ` Ankita Garg
2011-06-30 4:37 ` Ankita Garg
2011-06-30 4:37 ` Ankita Garg
2011-06-29 20:11 ` Andi Kleen
2011-06-29 20:11 ` Andi Kleen
2011-06-29 20:11 ` Andi Kleen
2011-06-29 20:11 ` Andi Kleen
2011-06-30 5:11 ` Ankita Garg
2011-06-30 5:11 ` Ankita Garg
2011-06-30 5:11 ` Ankita Garg
2011-06-30 5:11 ` Ankita Garg
2011-06-29 17:59 ` Dave Hansen
2011-06-29 18:07 ` Vaidyanathan Srinivasan
2011-06-29 18:07 ` Vaidyanathan Srinivasan
2011-06-29 18:07 ` Vaidyanathan Srinivasan
2011-06-29 18:07 ` Vaidyanathan Srinivasan
2011-06-29 17:06 ` Dave Hansen
2011-07-06 8:45 ` Pekka Enberg
2011-07-06 8:45 ` Pekka Enberg
2011-07-06 8:45 ` Pekka Enberg
2011-07-06 8:45 ` Pekka Enberg
2011-07-06 9:01 ` Pekka Enberg
2011-07-06 9:01 ` Pekka Enberg
2011-07-06 9:01 ` Pekka Enberg
2011-07-06 9:01 ` Pekka Enberg
2011-07-06 16:50 ` Vaidyanathan Srinivasan
2011-07-06 16:50 ` Vaidyanathan Srinivasan
2011-07-06 16:50 ` Vaidyanathan Srinivasan
2011-07-06 16:50 ` Vaidyanathan Srinivasan
2011-07-06 16:41 ` Vaidyanathan Srinivasan
2011-07-06 16:41 ` Vaidyanathan Srinivasan
2011-07-06 16:41 ` Vaidyanathan Srinivasan
2011-07-06 16:41 ` Vaidyanathan Srinivasan
2011-07-06 20:20 ` david
2011-07-06 20:20 ` david at lang.hm
2011-07-06 20:20 ` david
2011-07-06 20:20 ` david
2011-07-07 4:54 ` Ankita Garg
2011-07-07 4:54 ` Ankita Garg
2011-07-07 4:54 ` Ankita Garg
2011-07-07 4:54 ` Ankita Garg
2011-07-07 18:00 ` Pekka Enberg
2011-07-07 18:00 ` Pekka Enberg
2011-07-07 18:00 ` Pekka Enberg
2011-07-08 1:32 ` david
2011-07-08 1:32 ` david at lang.hm
2011-07-08 1:32 ` david
2011-07-08 1:32 ` david
2011-07-07 18:00 ` Pekka Enberg
-- strict thread matches above, loose matches on Subject: below --
2011-05-27 12:31 Ankita Garg
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