CSwitch class
This class is the event type class for context switch events.
The following syntax is simplified from MOF code.
[EventType{36}, EventTypeName{"CSwitch"}]
class CSwitch : Thread_V2
{
uint32 NewThreadId;
uint32 OldThreadId;
sint8 NewThreadPriority;
sint8 OldThreadPriority;
uint8 PreviousCState;
sint8 SpareByte;
sint8 OldThreadWaitReason;
sint8 OldThreadWaitMode;
sint8 OldThreadState;
sint8 OldThreadWaitIdealProcessor;
uint32 NewThreadWaitTime;
uint32 Reserved;
};
The CSwitch class has these types of members:
The CSwitch class has these properties.
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NewThreadId
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Data type: uint32
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Access type: Read-only
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Qualifiers: WmiDataId(1), Format("x")
New thread ID after the switch.
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NewThreadPriority
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(3)
Thread priority of the new thread.
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NewThreadWaitTime
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Data type: uint32
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Access type: Read-only
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Qualifiers: WmiDataId(11), Format("x")
Wait time for the new thread.
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OldThreadId
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Data type: uint32
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Access type: Read-only
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Qualifiers: WmiDataId(2), Format("x")
Previous thread ID.
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OldThreadPriority
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(4)
Thread priority of the previous thread.
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OldThreadState
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(9)
State of the previous thread. The following are the possible state values:
State Description 0 Initialized 1 Ready 2 Running 3 Standby 4 Terminated 5 Waiting 6 Transition 7 DeferredReady (added for Windows Server 2003) -
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OldThreadWaitIdealProcessor
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(10), Format("x")
Ideal wait time of the previous thread.
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OldThreadWaitMode
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(8)
Wait mode for the previous thread. The following are the possible values:
State Description 0 KernelMode 1 UserMode -
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OldThreadWaitReason
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(7)
Wait reason for the previous thread. The following are the possible values:
State Description 0 Executive 1 FreePage 2 PageIn 3 PoolAllocation 4 DelayExecution 5 Suspended 6 UserRequest 7 WrExecutive 8 WrFreePage 9 WrPageIn 10 WrPoolAllocation 11 WrDelayExecution 12 WrSuspended 13 WrUserRequest 14 WrEventPair 15 WrQueue 16 WrLpcReceive 17 WrLpcReply 18 WrVirtualMemory 19 WrPageOut 20 WrRendezvous 21 WrKeyedEvent 22 WrTerminated 23 WrProcessInSwap 24 WrCpuRateControl 25 WrCalloutStack 26 WrKernel 27 WrResource 28 WrPushLock 29 WrMutex 30 WrQuantumEnd 31 WrDispatchInt 32 WrPreempted 33 WrYieldExecution 34 WrFastMutex 35 WrGuardedMutex 36 WrRundown 37 MaximumWaitReason -
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PreviousCState
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Data type: uint8
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Access type: Read-only
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Qualifiers: WmiDataId(5)
The index of the C-state that was last used by the processor. A value of 0 represents the lightest idle state with higher values representing deeper C-states.
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Reserved
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Data type: uint32
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Access type: Read-only
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Qualifiers: WmiDataId(12)
Reserved.
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SpareByte
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Data type: sint8
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Access type: Read-only
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Qualifiers: WmiDataId(6)
Not used.
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These events produce a high volume of events.
Requirement | Value |
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Minimum supported client |
Windows Vista [desktop apps only] |
Minimum supported server |
Windows Server 2008 [desktop apps only] |