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OSCapture Registry Settings (Windows CE 5.0)

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You can modify the behavior of the OSCapture.exe application that flushes the CeLog log by changing specific registry values.

The CeLog registry settings are located under the HKEY_LOCAL_MACHINE\System\CeLog key.

The following list shows the ways in which you can change the registry settings:

  • Typically, to create a run-time image with predefined settings, add registry settings to the projects file before building the run-time image.
  • You can also use the Remote Registry Editor in Platform Builder to add the settings to a device. However, changes made from the Remote Registry Editor are not persistent to the registry files. Therefore, the next time that you download the image, you must configure the registry again.

The following table shows the named values you can set for the CeLog key.

Value: type Default Description
BufferSize: REG_DWORD 0x00020000 = 131072, or 128KB Specifies the size, in bytes, of the CeLog RAM buffer that stores event activity before flushing.
FileName: REG_SZ "\OSCapture.clg" Name of log file to store the data in.
FlushTimeout: REG_DWORD 0x000007D0 = 2000, or 2 seconds. Sets the timeout, in milliseconds, between successive "flushes." Note that OSCapture does not actually write data to a file until it is triggered; this value controls how much data is buffered in RAM.
SavedFlushes: REG_DWORD 0x0000000F = 15 Sets the number of "flushes" to buffer in RAM.
ThreadPriority: REG_DWORD 0x000000F8 = 248, the lowest real-time priority. Sets the priority of the flushing thread (0-255).
Transport: REG_SZ LocalFile Transport to use. This value must be one of the following:

  • LocalFile

    Stores data in log file on the local file system

  • CESH

    Stores data in log file on the remote host at \Release\LocalFile
UseUI: REG_DWORD 0 Boolean value that indicates type of messages.

1=use popup messages

0=debug messages only
ZoneCE: REG_DWORD 0x000043E3

This value represents the bitwise OR of the following zone values:

  • CELZONE_PROCESS
  • CELZONE_THREAD
  • CELZONE_RESCHEDULE
  • CELZONE_PRIORITYINV
  • CELZONE_CRITSECT
  • CELZONE_SYNCH
  • CELZONE_LOADER
  • CELZONE_INTERRUPT
 Specifies the CeLog zone settings.

If this value is present, OSCapture will call CeLogSetZones to pass the zones to CeLog.

Since, by default, OSCapture buffers 15 flushes of 2 seconds each, it buffers a total of 30 seconds of data by default.

If the RAM buffer is too small to hold this quantity of data, the actual amount of data in the buffer may be less.

Examples

The following examples show how to set common registry values that control OSCapture behavior.

  • Default

    These settings store the data in a log file called celog.clg in the release directory on the host PC.

    [HKEY_LOCAL_MACHINE\System\CeLog]
    "Transport"="LocalFile"
    "FileName"="\OSCapture.clg"

  • Log file on a storage card.

    This method requires a storage card on a device.

    [HKEY_LOCAL_MACHINE\System\CeLog]
    "Transport"="LocalFile"
    "FileName"="\\Storage Card\\OSCapture.clg"

  • "Flush" every second

    [HKEY_LOCAL_MACHINE\System\CeLog]
    "FlushTimeout"=dword:3E8

  • Low priority of flush thread

    This method lowers the thread priority for log flush from the default of 248 to 251, which corresponds to THREAD_PRIORITY_NORMAL**.**

    [HKEY_LOCAL_MACHINE\System\CeLog]
    "ThreadPriority"=dword:FB

See Also

Real-time Priority System Levels | OSCapture Command-Line Overrides

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