DPC class
This class is the event type class for device deferred procedure call (DPC) events.
The following syntax is simplified from MOF code.
[EventType{66, 68, 69}, EventTypeName{"ThreadDPC", "DPC", "TimerDPC"}]
class DPC : PerfInfo
{
object InitialTime;
uint32 Routine;
};
The DPC class has these types of members:
The DPC class has these properties.
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InitialTime
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Data type: object
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Access type: Read-only
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Qualifiers: WmiDataId(1), Extension("WmiTime")
DPC entry time.
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Routine
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Data type: uint32
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Access type: Read-only
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Qualifiers: WmiDataId(2), Pointer
Address of DPC routine. Use the address with the Image events to find which image started.
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These events are logged when a DPC is entered. You use these events to monitor and verify the behavior of drivers and kernel-mode components. For example, you can use DPC, ISR, and Image events to determine those components that spend too much time at high interrupt levels. DPC and ISR events have an entry time stamp which is used to compute the duration of the routines. The image events are read to construct the memory regions that map to certain modules. You can use the mapping to locate the module that contains the interrupt routine.
The TimerDPC event records when a DPC fires as a result of a timer expiration and the ThreadDPC event records when a threaded DPC executes.
Requirement | Value |
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Minimum supported client |
Windows Vista [desktop apps only] |
Minimum supported server |
Windows Server 2008 [desktop apps only] |