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Contention ETW Events

Contention events are raised whenever there is contention for System.Threading.Monitor locks or native locks used by the runtime. Contention occurs when a thread is waiting for a lock while another thread possesses the lock.

The following table shows the keyword under which contention events are raised, and the level of the events. (For more information, see CLR ETW Keywords and Levels.)

Keyword for raising the event

Level

ContentionKeyword (0x4000)

Informational (4)

The following table shows event information.

Event

Event ID

Raised when

ContentionStart_V1

81

Contention starts. This event does not include the amount of spinning time before a thread waits to acquire a lock; it is raised only when the thread waits to acquire a lock.

ContentionStop

81

Contention ends.

The following table shows event data.

Field name

Data type

Description

Flags

win:UInt8

0 for managed; 1 for native.

ClrInstanceID

win:UInt16

Unique ID for the instance of CLR.

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