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    <title>Intel Software Network Comments Feed</title>
    <link>http://software.intel.com/en-us/articles/intel-powerinformer</link>
    <description></description>
    <language>en-us</language>
    <item>
      <title>By johnsonzhang</title>
      <description><![CDATA[ i install this tool on my laptop, when running this tool, the error information tells me that "add Pdh counter (% of maximum frequency) failed with -1073738823 ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-13401</link>
      <pubDate>Tue, 30 Dec 2008 18:55:04 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-13401</guid>
    </item>
    <item>
      <title>By johnsonzhang</title>
      <description><![CDATA[ i find out the root cause, that is the tool only support English OS, my OS is Chinese version. ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-13407</link>
      <pubDate>Tue, 30 Dec 2008 19:31:19 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-13407</guid>
    </item>
    <item>
      <title>By Neftali Reyes</title>
      <description><![CDATA[ Looking for a tool that neasures C3 states.  I wrote my own, but it differs greatly in results when compare to original Intel C3Resmon utility.   Seeking to see if my utility was right all along. ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20348</link>
      <pubDate>Wed, 25 Feb 2009 22:49:57 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20348</guid>
    </item>
    <item>
      <title>By neftali_reyes</title>
      <description><![CDATA[ I also got the error message the previous guy posted  "add Pdh counter (% of maximum frequency) failed with -1073738823.

However, My system OS is english.   Does anyone have any answers to this? ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20383</link>
      <pubDate>Thu, 26 Feb 2009 10:19:58 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20383</guid>
    </item>
    <item>
      <title>By Allen_W</title>
      <description><![CDATA[ I meet this issue too on my side,
OS: EFI Vista 64 bit English
 ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20406</link>
      <pubDate>Fri, 27 Feb 2009 01:24:35 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20406</guid>
    </item>
    <item>
      <title>By allen.w</title>
      <description><![CDATA[ Please tell me if you guys have fixed this issue and thank you in advance! ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20408</link>
      <pubDate>Fri, 27 Feb 2009 01:41:22 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20408</guid>
    </item>
    <item>
      <title>By neftali_reyes</title>
      <description><![CDATA[ I think the developers of this tool have been laidoff form Intel reason why there is no answer.  Too bad, I thought this was a very nifty tool.  I guess I will continue to develop my own. ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20427</link>
      <pubDate>Fri, 27 Feb 2009 19:28:31 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20427</guid>
    </item>
    <item>
      <title>By Taylor</title>
      <description><![CDATA[ Unfortunately, due to changing priorities (now where have I heard that phrase before) the support of this tool has been sidelined for the foreseeable future. 

If I recall, the tool was developed for XP. I think that the original developer had some problems with Vista.

"Pdh" commands are the APIs that apps (such as Perfmon and PowerInformer) use to get at OS provided counters. The problem here is two fold: (1) MS likes to change the names of the counters from one OS generation to the next, and (2) MS is attempting to deprecate the pdh commands (as I understand it) in favor of a newer performance monitoring architecture within Vista.

Here's a side note: the pdh APIs, and so perfmon and PowerInformer, provide performance values obtained from the OS. This means that they are only roughly the same as their HW equivalents. For example, the information about C3 is an approximate aggregate of all lower C-states. As another example, the OS talks about "Logical processors", not physical processors.
 ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20691</link>
      <pubDate>Fri, 06 Mar 2009 16:10:59 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-20691</guid>
    </item>
    <item>
      <title>By wsung</title>
      <description><![CDATA[ In order to test CPU C3 state ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-21660</link>
      <pubDate>Wed, 25 Mar 2009 04:02:53 -0700</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-21660</guid>
    </item>
    <item>
      <title>By neff</title>
      <description><![CDATA[ Tailor:  I read your other blog about logical vs core, etc..  Very good article.

I'm developing a similar tool for approximations only so the Performance Monitor results are good enough for me.  Just in case you didn't see this question in your other blog,  I figure that the formula used for power Informer is (C3 Time / C3transitions) X 100 = C3 Residency.  Is this close enough?? ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-21869</link>
      <pubDate>Sat, 28 Mar 2009 10:45:04 -0700</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-21869</guid>
    </item>
    <item>
      <title>By taylor</title>
      <description><![CDATA[ It's SUM{ (dSamplePercentIdle[i]/100) * (dSamplePercentCn[i]/100) }*100

where the SUM is over the delta period that you're looking at, e.g. 1 sec.

The pdh values are obtained from PDH_FUNCTION PdhGetFormattedCounterValue( PDH_COUNTER, DWORD, LPDWORD, PPDH_FMT_COUNTERVALUE). See MS's pdh.h.

The counter name (at least in XP) is "\Processor\% C3 Time". (Remember that "\" is an escape command so you need "\\".) Double check this as the counter name can be picky. If you're on Vista, the name could very well be different.

The way you use the pdh commands seem a little strange until it sinks in. You add the counter first, then at some later point, you sample it. Basically, you're trying to minimize overhead. So you tell the OS what counters you want to sample before you actually issue a get counter command. To make this even more accurate, some of the pdh commands are "array", meaning that you collectively sample several counters at once.

I know I'm being boringly pedantic about this but remember that the HW counters are not the same as the pdh counters.
 ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-21951</link>
      <pubDate>Mon, 30 Mar 2009 10:36:59 -0700</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-21951</guid>
    </item>
    <item>
      <title>By Hamin</title>
      <description><![CDATA[ Hi all,

For test c-states, 
1.we can use PowerInformer from Intel or Perfmon.msc /s from OS. When I used PowerInformer, Win Vista Business SP2 show me "add Pdh counter (% of maximum frequency) failed with -1073738824". What's the problem?
2.How to test C4(E) and C6? Does Intel have any tools for using?
3.In Win7, are there any tools for testing c-states? ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-35021</link>
      <pubDate>Wed, 18 Nov 2009 22:45:46 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-35021</guid>
    </item>
    <item>
      <title>By Jason Yue</title>
      <description><![CDATA[ Hi all,
Who can tell me what's the latest tool to test C3/C6?
It seems Core_power_state_tool r1.1 doesn't support in Win7. ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-38307</link>
      <pubDate>Mon, 18 Jan 2010 19:05:55 -0800</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-38307</guid>
    </item>
    <item>
      <title>By Jon</title>
      <description><![CDATA[ On starting Intel PowerInformer, crashes with following error code:
CallNtPowerInformation for processor failed with return code -1073741789

Any idea on whats going on or how to resolve this? I was unable to resolve this error.

I have a bunch of Intel processor/chipset based servers at work, Q9550, Celeron E3200
desktops & several [45nm & 32nm CPU based] laptops at home. However using PerfMon
on Vista x64 or Windows 7 x64, I don't see the CPu's going into C2/C3 states not even
once. However this is not the case when monitoring CPU sleep states using PoerTOP in
OpenSolaris.

If Intel can't/won't make PowerInformer work, or put out a new software that works
(PowerInformer is almost 2 years old now!), why not just port PowerTOP to Windows?
I'm sure the code for PowerTOP is licensed under GPL, so it shouldn't be a problem.

Frankly, I wouldn't mind if it was only a cmd/PowerShell program, without a GUI.

http://www.lesswatts.org/projects/powertop/

http://en.wikipedia.org/wiki/PowerTOP

http://www.linuxpowertop.org/index.php

http://hub.opensolaris.org/bin/view/Project+tesla/Powertop
 ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-50709</link>
      <pubDate>Fri, 22 Oct 2010 10:57:54 -0700</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-50709</guid>
    </item>
    <item>
      <title>By Sergey Lebedev</title>
      <description><![CDATA[ Hello, 
I have a problem with PowerInformer:
1st It does not work on windows 7, because it use old winapi function.
2nd It is not working on windows XP on a laptops and desctops with different configurations.
       Laptop : i5- 2410
       Desctop : DualCore 5300
       It was Russian Windows XP Home Basic;
     When I open the application, it gives me a Error: "System finished initialised!!! Please click Exit and rerun the program"
 Can you tell me working configurations, and, if it is possible, the instruments which this programm use. (WinApi func or some drivers)? ]]></description>
      <link>http://software.intel.com/en-us/articles/intel-powerinformer/#comment-64443</link>
      <pubDate>Sat, 17 Sep 2011 10:55:48 -0700</pubDate>
      <guid isPermaLink="true">http://software.intel.com/en-us/articles/intel-powerinformer/#comment-64443</guid>
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