On 2/8/2012 4:41 PM, E-Mail Sent to this address will be added to the
BlackLists wrote:
BlackList wrote:
Any CPU power management enabled?
Good question, but, no. System is set never to sleep,
never to standby, never to shut down hard drive,
and hibernate only if on battery with critical low battery.
FYI, CPU power management differs from those system power
management you mentioned.
e.g. Both Intel& AMD have differing cpu core power management
in their current multi-core products, that vary core frequency,
& / or shutdown some cores, .... (among other things they change
in the cores like supply voltage);
Some of them change without / beyond user control.
See also: ACPI C& P states
Consider this:
<BlockQuote>
<http://www.intel.com/support/processors/tools/piu/sb/CS-031497.htm>
Power Management modes may interfere with speed detection
tests performed by the Processor Identification Utility.
Power management modes can result in a marginally higher
or lower reported frequency than the expected frequency.
</BlockQuote>
<http://www.intel.com/technology/itj/2006/volume10issue02/art03_Power_and_Thermal_Management/p03_power_management.htm?wapkw=Power%20Management>
<BlockQuote>
AMD CoolCore™ Technology
Works automatically without the need for drivers or BIOS enablement.
Power can be switched on or off within a single clock cycle,
saving energy with no impact to performance.
</BlockQuote>
<http://www.amd.com/us/products/desktop/processors/phenom-ii/Pages/phenom-ii-key-architectural-features.aspx>
I can't find one specific article at the moment, however IIRC,
it said there were some AMD flavors that will change
the core frequencies for thermal management,
independent of user controls.
FYI: For Win 7& Vista, to lock the process to a specific core,
See: start /affinity
I see what you mean. From that point of view, I think the only settings
I have access to in the power configuration are:
Minimum CPU Frequency - 20%
Maximum CPU Frequency - 100%
System Cooling Policy - Active (I think that varies the fan before
throttling the CPU for heat reasons.)
There is also another thing which may be related:
USB Selective Suspend - Enabled
Since the Meinberg installer set up NTPD to run as a service, I don't
know how to set a processor affinity. I'm not sure that would affect
the stability of NTPD anyway.
Sincerely,
Ron
--
(PS - If you email me and don't get a quick response, don't be concerned.
I get about 300 emails per day from alternate energy mailing lists and
such. I don't always see new messages very quickly. If you need a
reply and have not heard from me in 1 - 2 weeks, send your message again.)
Ron Frazier
timekeepingdude AT c3energy.com
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