* Please review power management abstract for LF End User Summit
@ 2009-10-28 16:35 Brown, Len
2009-10-28 16:40 ` Van De Ven, Arjan
` (3 more replies)
0 siblings, 4 replies; 9+ messages in thread
From: Brown, Len @ 2009-10-28 16:35 UTC (permalink / raw)
To: Van De Ven, Arjan, Mallick, Asit K, Kleen, Andi,
'linux-power-mgmt@linux.intel.com'
I've been asked to present on server power management
in a couple of weeks at the Linux Foundation End User Summit in New York.
Please review the abstract below -- I need to submit it today.
I've also penciled in an outline for the talk below,
let me know if there is something that server customers
may want to hear about that I've forgotton to include.
thanks!
-Len
Title: Topics in Linux Server Power Management
-----
Abstract:
--------
Today's high volume servers deploy several power management
features originally developed for laptop computers.
While Linux runs on laptops and thus already has support for
these features, servers have performance constraints
not generally found on laptops.
This talk starts with an overview of power management features
supported in Linux on high volumem servers, and then describes
how to maximize power savings while still meeting
server performance requirements.
No previous knowledge of Linux power management features
is necessary to benefit from this presentation.
Outline:
-------
CPU Idle Power states (C-staes)
what they are
how to observe
knobs to debug/control
C1 vs C1E
core vs package C-states
Processor Performance States (P-state)
what they are
how to observe
knobs to debug/control
ondemand vs. userspace
Turbo Mode (Intel Dynamic Acceleration Technology)
what it is
how to observe
knobs to debug/control
PM-QOS
what it is, how it works, how to use it
Power Aware Scheduling
what it is, how to use it
^ permalink raw reply [flat|nested] 9+ messages in thread
* RE: Please review power management abstract for LF End User Summit
2009-10-28 16:35 Please review power management abstract for LF End User Summit Brown, Len
@ 2009-10-28 16:40 ` Van De Ven, Arjan
2009-10-28 16:50 ` Matthew Garrett
` (2 subsequent siblings)
3 siblings, 0 replies; 9+ messages in thread
From: Van De Ven, Arjan @ 2009-10-28 16:40 UTC (permalink / raw)
To: Brown, Len, Mallick, Asit K, Kleen, Andi,
'linux-power-mgmt@linux.intel.com'
if you want to be cool you do a demo of the power tools we have....
makes it more interactive as well
>-----Original Message-----
>From: Brown, Len
>Sent: Wednesday, October 28, 2009 9:35
>To: Van De Ven, Arjan; Mallick, Asit K; Kleen, Andi; 'linux-power-
>mgmt@linux.intel.com'; linux-acpi@vger.kernel.org
>Subject: Please review power management abstract for LF End User Summit
>
>I've been asked to present on server power management
>in a couple of weeks at the Linux Foundation End User Summit in New
>York.
>
>Please review the abstract below -- I need to submit it today.
>
>I've also penciled in an outline for the talk below,
>let me know if there is something that server customers
>may want to hear about that I've forgotton to include.
>
>thanks!
>-Len
>
>
>
>Title: Topics in Linux Server Power Management
>-----
>Abstract:
>--------
>Today's high volume servers deploy several power management
>features originally developed for laptop computers.
>While Linux runs on laptops and thus already has support for
>these features, servers have performance constraints
>not generally found on laptops.
>
>This talk starts with an overview of power management features
>supported in Linux on high volumem servers, and then describes
>how to maximize power savings while still meeting
>server performance requirements.
>
>No previous knowledge of Linux power management features
>is necessary to benefit from this presentation.
>
>Outline:
>-------
>CPU Idle Power states (C-staes)
> what they are
> how to observe
> knobs to debug/control
>
> C1 vs C1E
> core vs package C-states
>
>Processor Performance States (P-state)
> what they are
> how to observe
> knobs to debug/control
>
> ondemand vs. userspace
>
>Turbo Mode (Intel Dynamic Acceleration Technology)
> what it is
> how to observe
> knobs to debug/control
>
>PM-QOS
> what it is, how it works, how to use it
>
>Power Aware Scheduling
> what it is, how to use it
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Please review power management abstract for LF End User Summit
2009-10-28 16:35 Please review power management abstract for LF End User Summit Brown, Len
2009-10-28 16:40 ` Van De Ven, Arjan
@ 2009-10-28 16:50 ` Matthew Garrett
2009-10-28 17:07 ` Kleen, Andi
2009-11-07 5:30 ` Len Brown
3 siblings, 0 replies; 9+ messages in thread
From: Matthew Garrett @ 2009-10-28 16:50 UTC (permalink / raw)
To: Brown, Len
Cc: Van De Ven, Arjan, Mallick, Asit K, Kleen, Andi,
'linux-power-mgmt@linux.intel.com',
linux-acpi
aspm and alpm are probably also relevant. PCI runtime pm is an
interesting near-term development.
--
Matthew Garrett | mjg59@srcf.ucam.org
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Please review power management abstract for LF End User Summit
2009-10-28 17:07 ` Kleen, Andi
@ 2009-10-28 17:06 ` Randy Dunlap
2009-10-28 17:23 ` [Linux-power-mgmt] " Gangadhar, Mukesh
1 sibling, 0 replies; 9+ messages in thread
From: Randy Dunlap @ 2009-10-28 17:06 UTC (permalink / raw)
To: Kleen, Andi
Cc: Brown, Len, Van De Ven, Arjan, Mallick, Asit K,
'linux-power-mgmt@linux.intel.com',
linux-acpi
On Wed, 28 Oct 2009 17:07:14 +0000 Kleen, Andi wrote:
> I would start with a power break down on a typical server.
>
> Also at least mention things like power saving by not enabling ethernet
> links.
and avoid ipmi (usually polling instead of interrupt-driven)
unless it is actively being used.
---
~Randy
^ permalink raw reply [flat|nested] 9+ messages in thread
* RE: Please review power management abstract for LF End User Summit
2009-10-28 16:35 Please review power management abstract for LF End User Summit Brown, Len
2009-10-28 16:40 ` Van De Ven, Arjan
2009-10-28 16:50 ` Matthew Garrett
@ 2009-10-28 17:07 ` Kleen, Andi
2009-10-28 17:06 ` Randy Dunlap
2009-10-28 17:23 ` [Linux-power-mgmt] " Gangadhar, Mukesh
2009-11-07 5:30 ` Len Brown
3 siblings, 2 replies; 9+ messages in thread
From: Kleen, Andi @ 2009-10-28 17:07 UTC (permalink / raw)
To: Brown, Len, Van De Ven, Arjan, Mallick, Asit K,
'linux-power-mgmt@linux.intel.com'
I would start with a power break down on a typical server.
Also at least mention things like power saving by not enabling ethernet
links.
-Andi
>-----Original Message-----
>From: Brown, Len
>Sent: Wednesday, October 28, 2009 5:35 PM
>To: Van De Ven, Arjan; Mallick, Asit K; Kleen, Andi;
>'linux-power-mgmt@linux.intel.com'; linux-acpi@vger.kernel.org
>Subject: Please review power management abstract for LF End User Summit
>
>I've been asked to present on server power management
>in a couple of weeks at the Linux Foundation End User Summit
>in New York.
>
>Please review the abstract below -- I need to submit it today.
>
>I've also penciled in an outline for the talk below,
>let me know if there is something that server customers
>may want to hear about that I've forgotton to include.
>
>thanks!
>-Len
>
>
>
>Title: Topics in Linux Server Power Management
>-----
>Abstract:
>--------
>Today's high volume servers deploy several power management
>features originally developed for laptop computers.
>While Linux runs on laptops and thus already has support for
>these features, servers have performance constraints
>not generally found on laptops.
>
>This talk starts with an overview of power management features
>supported in Linux on high volumem servers, and then describes
>how to maximize power savings while still meeting
>server performance requirements.
>
>No previous knowledge of Linux power management features
>is necessary to benefit from this presentation.
>
>Outline:
>-------
>CPU Idle Power states (C-staes)
> what they are
> how to observe
> knobs to debug/control
>
> C1 vs C1E
> core vs package C-states
>
>Processor Performance States (P-state)
> what they are
> how to observe
> knobs to debug/control
>
> ondemand vs. userspace
>
>Turbo Mode (Intel Dynamic Acceleration Technology)
> what it is
> how to observe
> knobs to debug/control
>
>PM-QOS
> what it is, how it works, how to use it
>
>Power Aware Scheduling
> what it is, how to use it
>
^ permalink raw reply [flat|nested] 9+ messages in thread
* RE: [Linux-power-mgmt] RE: Please review power management abstract for LF End User Summit
2009-10-28 17:07 ` Kleen, Andi
2009-10-28 17:06 ` Randy Dunlap
@ 2009-10-28 17:23 ` Gangadhar, Mukesh
1 sibling, 0 replies; 9+ messages in thread
From: Gangadhar, Mukesh @ 2009-10-28 17:23 UTC (permalink / raw)
To: Kleen, Andi, Brown, Len, Van De Ven, Arjan, Mallick, Asit K,
'linux-powe
A topic on virtualization and power management would be useful...
Thanks
Mukesh
-----Original Message-----
From: linux-power-mgmt-bounces@linux.intel.com [mailto:linux-power-mgmt-bounces@linux.intel.com] On Behalf Of Kleen, Andi
Sent: Wednesday, October 28, 2009 10:37 PM
To: Brown, Len; Van De Ven, Arjan; Mallick, Asit K; 'linux-power-mgmt@linux.intel.com'; linux-acpi@vger.kernel.org
Subject: [Linux-power-mgmt] RE: Please review power management abstract for LF End User Summit
I would start with a power break down on a typical server.
Also at least mention things like power saving by not enabling ethernet
links.
-Andi
>-----Original Message-----
>From: Brown, Len
>Sent: Wednesday, October 28, 2009 5:35 PM
>To: Van De Ven, Arjan; Mallick, Asit K; Kleen, Andi;
>'linux-power-mgmt@linux.intel.com'; linux-acpi@vger.kernel.org
>Subject: Please review power management abstract for LF End User Summit
>
>I've been asked to present on server power management
>in a couple of weeks at the Linux Foundation End User Summit
>in New York.
>
>Please review the abstract below -- I need to submit it today.
>
>I've also penciled in an outline for the talk below,
>let me know if there is something that server customers
>may want to hear about that I've forgotton to include.
>
>thanks!
>-Len
>
>
>
>Title: Topics in Linux Server Power Management
>-----
>Abstract:
>--------
>Today's high volume servers deploy several power management
>features originally developed for laptop computers.
>While Linux runs on laptops and thus already has support for
>these features, servers have performance constraints
>not generally found on laptops.
>
>This talk starts with an overview of power management features
>supported in Linux on high volumem servers, and then describes
>how to maximize power savings while still meeting
>server performance requirements.
>
>No previous knowledge of Linux power management features
>is necessary to benefit from this presentation.
>
>Outline:
>-------
>CPU Idle Power states (C-staes)
> what they are
> how to observe
> knobs to debug/control
>
> C1 vs C1E
> core vs package C-states
>
>Processor Performance States (P-state)
> what they are
> how to observe
> knobs to debug/control
>
> ondemand vs. userspace
>
>Turbo Mode (Intel Dynamic Acceleration Technology)
> what it is
> how to observe
> knobs to debug/control
>
>PM-QOS
> what it is, how it works, how to use it
>
>Power Aware Scheduling
> what it is, how to use it
>_______________________________________________
Linux-power-mgmt mailing list
Linux-power-mgmt@linux.intel.com
http://linux.intel.com/mailman/listinfo/linux-power-mgmt
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Please review power management abstract for LF End User Summit
2009-10-28 16:35 Please review power management abstract for LF End User Summit Brown, Len
` (2 preceding siblings ...)
2009-10-28 17:07 ` Kleen, Andi
@ 2009-11-07 5:30 ` Len Brown
2009-11-14 16:27 ` Robert Hancock
3 siblings, 1 reply; 9+ messages in thread
From: Len Brown @ 2009-11-07 5:30 UTC (permalink / raw)
To: Brown, Len
Cc: Van De Ven, Arjan, Mallick, Asit K, Kleen, Andi,
'linux-power-mgmt@linux.intel.com',
linux-acpi
Thanks for the suggestions.
final abstract is here:
http://events.linuxfoundation.org/eus09hpc4
presentation being constructed here (currently draft 0.5):
http://userweb.kernel.org/~lenb/doc/2009-EUS-Server-PM-web/index.html
cheers,
-Len Brown, Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Please review power management abstract for LF End User Summit
2009-11-07 5:30 ` Len Brown
@ 2009-11-14 16:27 ` Robert Hancock
2009-12-16 8:46 ` Len Brown
0 siblings, 1 reply; 9+ messages in thread
From: Robert Hancock @ 2009-11-14 16:27 UTC (permalink / raw)
To: Len Brown
Cc: Brown, Len, Van De Ven, Arjan, Mallick, Asit K, Kleen, Andi,
'linux-power-mgmt@linux.intel.com',
linux-acpi
On 11/06/2009 11:30 PM, Len Brown wrote:
> Thanks for the suggestions.
>
> final abstract is here:
> http://events.linuxfoundation.org/eus09hpc4
>
> presentation being constructed here (currently draft 0.5):
> http://userweb.kernel.org/~lenb/doc/2009-EUS-Server-PM-web/index.html
>
> cheers,
> -Len Brown, Intel Open Source Technology Center
I noticed you mention that "power off is a valid power management
strategy".. indeed you can use WOL to power up again, and Linux can boot
quickly, unfortunately the boot speed on most server platforms in the
BIOS before even starting to boot the OS is abysmal, and seems to be
getting worse there as it improves in desktop systems. Some IBM servers
take MINUTES just to initialize the RAID controller.. this sort of thing
isn't exactly conducive to rapid power-up of servers when required.
Also, the power-off power usage of some servers isn't great either -
some of them even have to keep the power supply fans running when
powered off, otherwise presumably the PS would heat up too much..
Presumably in both of these cases it's because of a lack of demand for
better behavior (fast power-up on desktops is demanded by Microsoft
"designed for Windows" specs, and low power-off power usage is required
by Energy Star, EU standards, etc.)
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Please review power management abstract for LF End User Summit
2009-11-14 16:27 ` Robert Hancock
@ 2009-12-16 8:46 ` Len Brown
0 siblings, 0 replies; 9+ messages in thread
From: Len Brown @ 2009-12-16 8:46 UTC (permalink / raw)
To: Robert Hancock
Cc: Brown, Len, Van De Ven, Arjan, Mallick, Asit K, Kleen, Andi,
'linux-power-mgmt@linux.intel.com',
linux-acpi
On Sat, 14 Nov 2009, Robert Hancock wrote:
> On 11/06/2009 11:30 PM, Len Brown wrote:
> > Thanks for the suggestions.
> >
> > final abstract is here:
> > http://events.linuxfoundation.org/eus09hpc4
> >
> > presentation being constructed here (currently draft 0.5):
> > http://userweb.kernel.org/~lenb/doc/2009-EUS-Server-PM-web/index.html
> I noticed you mention that "power off is a valid power management strategy"..
> indeed you can use WOL to power up again, and Linux can boot quickly,
> unfortunately the boot speed on most server platforms in the BIOS before even
> starting to boot the OS is abysmal, and seems to be getting worse there as it
> improves in desktop systems. Some IBM servers take MINUTES just to initialize
> the RAID controller.. this sort of thing isn't exactly conducive to rapid
> power-up of servers when required.
Agreed, though not all systems have these delays -- choose wisely:-)
> Also, the power-off power usage of some servers isn't great either - some of
> them even have to keep the power supply fans running when powered off,
> otherwise presumably the PS would heat up too much..
ditto.
> Presumably in both of these cases it's because of a lack of demand for better
> behavior (fast power-up on desktops is demanded by Microsoft "designed for
> Windows" specs, and low power-off power usage is required by Energy Star, EU
> standards, etc.)
Yes, I agree think that these external forces are effective in getting
system vendors in line. Another is formal RFQ's for large purchases
where the customer specifies exactly what they want.
cheers,
-Len
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2009-12-16 8:46 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-10-28 16:35 Please review power management abstract for LF End User Summit Brown, Len
2009-10-28 16:40 ` Van De Ven, Arjan
2009-10-28 16:50 ` Matthew Garrett
2009-10-28 17:07 ` Kleen, Andi
2009-10-28 17:06 ` Randy Dunlap
2009-10-28 17:23 ` [Linux-power-mgmt] " Gangadhar, Mukesh
2009-11-07 5:30 ` Len Brown
2009-11-14 16:27 ` Robert Hancock
2009-12-16 8:46 ` Len Brown
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