CSwitch Class
[This documentation is preliminary and is subject to change.]
This class is the event type class for context switch events.
The following syntax is simplified from MOF code.
Syntax
[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;
};
Methods
The CSwitch class does not define any methods.
Properties
The CSwitch class defines the following properties.
NewThreadId
Data type: uint32
Access type: Read-only
Qualifiers: WmiDataId(1), Format("x")
New thread ID after the switch.
NewThreadPriority
Data type: sint8
Access type: Read-only
Qualifiers: WmiDataId(3)
Thread priority of the new thread.
NewThreadWaitTime
Data type: uint32
Access type: Read-only
Qualifiers: WmiDataId(11), Format("x")
Wait time for the new thread.
OldThreadId
Data type: uint32
Access type: Read-only
Qualifiers: WmiDataId(2), Format("x")
Previous thread ID.
OldThreadPriority
Data type: sint8
Access type: Read-only
Qualifiers: WmiDataId(4)
Thread priority of the previous thread.
OldThreadState
Data type: sint8
Access type: Read-only
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) |
OldThreadWaitIdealProcessor
Data type: sint8
Access type: Read-only
Qualifiers: WmiDataId(10), Format("x")
Ideal wait time of the previous thread.
OldThreadWaitMode
Data type: sint8
Access type: Read-only
Qualifiers: WmiDataId(8)
Wait mode for the previous thread.
OldThreadWaitReason
Data type: sint8
Access type: Read-only
Qualifiers: WmiDataId(7)
Wait reason for the previous thread.
PreviousCState
Data type: uint8
Access type: Read-only
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.
Reserved
Data type: uint32
Access type: Read-only
Qualifiers: WmiDataId(12)
Reserved.
SpareByte
Data type: sint8
Access type: Read-only
Qualifiers: WmiDataId(6)
Not used.
Remarks
These events produce a high volume of events.
Requirements
| Minimum supported client | Windows Vista |
| Minimum supported server | Windows Server 2008 |
See Also
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Build date: 5/7/2009