FIX: The hardware watchdog does not trigger a system reset on a Windows Embedded Compact 7-based device that uses symmetric multiprocessing

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Article ID: 2701179 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a Windows Embedded Compact 7-based device that uses the symmetric multiprocessing (SMP) hardware platform.
  • You configure the kernel watchdog thread to update the hardware watchdog timer in order to enable the watchdog feature on the device.
  • An interrupt storm occurs and consumes 100% of the primary processor’s time when the system is running.

    Note The remaining processors in the device are available during this time.

In this scenario, the hardware watchdog does not trigger a system reset on the device.

CAUSE

This issue occurs because the kernel watchdog thread is schedulable on any available processor instead of just the primary processor on an SMP platform.

RESOLUTION

Software update information

A supported software update is now available from Microsoft as Windows Embedded Compact 7 Monthly Update May 2012. In the "File information" section, the package file name contains the processor type.

Note This Windows Embedded Compact 7 Monthly Update is available for download from the following Microsoft Download Center website:
Windows Embedded Compact 7 Updates

Prerequisites

This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement

After you apply this update, you must perform a clean build of the whole platform. To do this, use one of the following methods:
  • On the Build menu, click Clean Solution, and then click Build Solution.
  • On the Build menu, click Rebuild Solution.
You do not have to restart the computer after you apply this software update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this software update package has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Files that are included in this update package
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File nameFile sizeDateTimePath
Watchdog.c15,62024-Apr-201200:27Private\Winceos\Coreos\Nk\Kernel
Nkmain.lib3,550,90224-Apr-201218:37Public\Common\Oak\Lib\Armv5\Checked
Nkprmain.lib3,608,51224-Apr-201218:37Public\Common\Oak\Lib\Armv5\Checked
Nkmain.lib3,941,58024-Apr-201218:38Public\Common\Oak\Lib\Armv5\Debug
Nkprmain.lib4,012,18424-Apr-201218:38Public\Common\Oak\Lib\Armv5\Debug
Nkmain.lib2,427,72224-Apr-201218:37Public\Common\Oak\Lib\Armv5\Retail
Nkprmain.lib2,486,01424-Apr-201218:37Public\Common\Oak\Lib\Armv5\Retail
Nkmain.lib3,550,83624-Apr-201218:38Public\Common\Oak\Lib\Armv6\Checked
Nkprmain.lib3,608,44624-Apr-201218:38Public\Common\Oak\Lib\Armv6\Checked
Nkmain.lib3,940,80824-Apr-201218:38Public\Common\Oak\Lib\Armv6\Debug
Nkprmain.lib4,011,41224-Apr-201218:38Public\Common\Oak\Lib\Armv6\Debug
Nkmain.lib2,427,69224-Apr-201218:38Public\Common\Oak\Lib\Armv6\Retail
Nkprmain.lib2,485,98424-Apr-201218:38Public\Common\Oak\Lib\Armv6\Retail
Nkmain.lib3,540,49824-Apr-201218:39Public\Common\Oak\Lib\Armv7\Checked
Nkprmain.lib3,597,88824-Apr-201218:39Public\Common\Oak\Lib\Armv7\Checked
Nkmain.lib3,930,50424-Apr-201218:39Public\Common\Oak\Lib\Armv7\Debug
Nkprmain.lib4,000,27224-Apr-201218:39Public\Common\Oak\Lib\Armv7\Debug
Nkmain.lib2,421,23024-Apr-201218:38Public\Common\Oak\Lib\Armv7\Retail
Nkprmain.lib2,479,51424-Apr-201218:38Public\Common\Oak\Lib\Armv7\Retail
Nkmain.lib3,254,38624-Apr-201218:39Public\Common\Oak\Lib\Mipsii\Checked
Nkprmain.lib3,300,65024-Apr-201218:39Public\Common\Oak\Lib\Mipsii\Checked
Nkmain.lib3,687,71624-Apr-201218:40Public\Common\Oak\Lib\Mipsii\Debug
Nkprmain.lib3,756,53424-Apr-201218:40Public\Common\Oak\Lib\Mipsii\Debug
Nkmain.lib2,192,78424-Apr-201218:39Public\Common\Oak\Lib\Mipsii\Retail
Nkprmain.lib2,239,95024-Apr-201218:39Public\Common\Oak\Lib\Mipsii\Retail
Nkmain.lib3,312,66824-Apr-201218:40Public\Common\Oak\Lib\Mipsii_fp\Checked
Nkprmain.lib3,358,97624-Apr-201218:40Public\Common\Oak\Lib\Mipsii_fp\Checked
Nkmain.lib3,764,57424-Apr-201218:40Public\Common\Oak\Lib\Mipsii_fp\Debug
Nkprmain.lib3,833,42424-Apr-201218:40Public\Common\Oak\Lib\Mipsii_fp\Debug
Nkmain.lib2,253,56824-Apr-201218:40Public\Common\Oak\Lib\Mipsii_fp\Retail
Nkprmain.lib2,300,67624-Apr-201218:40Public\Common\Oak\Lib\Mipsii_fp\Retail
Nkmain.lib3,000,99424-Apr-201218:41Public\Common\Oak\Lib\Sh4\Checked
Nkprmain.lib3,038,54224-Apr-201218:41Public\Common\Oak\Lib\Sh4\Checked
Nkmain.lib3,306,99024-Apr-201218:41Public\Common\Oak\Lib\Sh4\Debug
Nkprmain.lib3,357,03224-Apr-201218:41Public\Common\Oak\Lib\Sh4\Debug
Nkmain.lib2,065,12024-Apr-201218:41Public\Common\Oak\Lib\Sh4\Retail
Nkprmain.lib2,107,01224-Apr-201218:41Public\Common\Oak\Lib\Sh4\Retail
Nkmain.lib3,078,55224-Apr-201218:41Public\Common\Oak\Lib\X86\Checked
Nkprmain.lib3,120,67824-Apr-201218:41Public\Common\Oak\Lib\X86\Checked
Nkmain.lib3,218,78824-Apr-201218:42Public\Common\Oak\Lib\X86\Debug
Nkprmain.lib3,266,65224-Apr-201218:42Public\Common\Oak\Lib\X86\Debug
Nkmain.lib2,026,13624-Apr-201218:41Public\Common\Oak\Lib\X86\Retail
Nkprmain.lib2,068,58224-Apr-201218:41Public\Common\Oak\Lib\X86\Retail

REFERENCES

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 2701179 - Last Review: June 12, 2012 - Revision: 1.0
APPLIES TO
  • Windows Embedded Compact 7
Keywords: 
kbfix kbqfe kbpubtypekc kbexpertiseinter kbsurveynew KB2701179

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