CSwitch class

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;
};

Members

The CSwitch class has these types of members:

• Properties

Properties

The CSwitch class has these 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. The following are the possible values:

State	Description
0	KernelMode
1	UserMode

OldThreadWaitReason

Data type: sint8

Access type: Read-only

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

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

See also

Thread

Thread_V2