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	91	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.

See also

• CLR ETW Events