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JIT Tracing ETW Events

These events collect information relating to the success or failure of just-in-time (JIT) inlining and JIT tail calls.

JIT tracing events consist of the following two categories:

MethodJitInliningFailed Event

The following table shows the keyword and level. (For more information, see CLR ETW Keywords and Levels.)

Keyword for raising the event

Level

JITTracingKeyword (0x10)

Verbose (5)

The following table shows the event information.

Event

Event ID

Raised when

MethodJitInliningFailed

186

The JIT inlining failed.

The following table shows the event data.

Field name

Data type

Description

MethodBeingCompiledNameSpace

win:UnicodeString

Namespace of the method that is being compiled.

MethodBeingCompiledName

win:UnicodeString

Name of the method that is being compiled.

MethodBeingCompiledNameSignature

win:UnicodeString

Signature of the method that is being compiled.

InlinerNamespace

win:UnicodeString

The namespace of the method the JIT compiler is trying to generate code for.

InlinerName

win:UnicodeString

The name of the method the compiler is attempting to generate code for. This might not be the same as MethodBeingCompiledName if the compiler is attempting to inline code into MethodBeingCompiledName instead of generating a call to InlinerName.

InlinerNameSignature

win:UnicodeString

The signature for the inliner.

InlineeNamespace

win:UnicodeString

The namespace of the inlinee.

InlineeName

win:UnicodeString

The method the compiler is trying to inline (not generate a call to).

InlineeNameSignature

win:UnicodeString

The signature for the inlinee.

FailAlways

win:Boolean

A hint to the JIT compiler that inlining will always fail for the inlinee.

FailReason

win:UnicodeString

INLINE_NEVER means a previous inlining attempt determined that inlining will never succeed for some other reason; otherwise, free-form text.

ClrInstanceID

win:UnicodeString

Unique ID for the instance of CLR or CoreCLR.

MethodJitInliningSucceeded Event

The following table shows the keyword and level.

Keyword for raising the event

Level

JITTracingKeyword (0x10)

Verbose (5)

The following table shows the event information.

Event

Event ID

Raised when

MethodJitInliningSucceeded

185

The method inlining succeeded.

The following table shows the event data.

Field name

Data type

Description

MethodBeingCompiledNameSpace

win:UnicodeString

The namespace of the method that is being compiled.

MethodBeingCompiledName

win:UnicodeString

The name of the method being that is compiled.

MethodBeingCompiledNameSignature

win:UnicodeString

The signature of the method that is being compiled.

InlinerNamespace

win:UnicodeString

The namespace of the method the JIT compiler is attempting to generate code for.

InlinerName

win:UnicodeString

The name of the method the compiler is attempting to generate code for. This might not be the same as MethodBeingCompiledName if the compiler is attempting to inline code into MethodBeingCompiledName instead of generating a call to InlinerName.

InlinerNameSignature

win:UnicodeString

The signature for the inliner.

InlineeNamespace

win:UnicodeString

The namespace of the inlinee.

InlineeName

win:UnicodeString

The method the compiler is trying to inline (not generate a call to).

InlineeNameSignature

win:UnicodeString

The signature for the inlinee.

ClrInstanceID

win:UInt16

Unique ID for the instance of CLR or CoreCLR.

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MethodJITTailCallFailed Event

The following table shows the keyword and level.

Keyword for raising the event

Level

JITTracingKeyword (0x10)

Verbose (5)

The following table shows the event information.

Event

Event ID

Raised when

MethodJitTailCallFailed

189

The method tail call failed.

The following table shows the event data.

Field name

Data type

Description

MethodBeingCompiledNameSpace

win:UnicodeString

Namespace of the method that is being compiled.

MethodBeingCompiledName

win:UnicodeString

Name of the method that is being compiled.

MethodBeingCompiledNameSignature

win:UnicodeString

Signature of the method that is being compiled.

CallerNamespace

win:UnicodeString

The namespace of the method the JIT compiler is attempting to generate code for.

CallerName

win:UnicodeString

The name of the method the compiler is attempting to generate code for.

CallerNameSignature

win:UnicodeString

The signature for the caller.

CalleeNamespace

win:UnicodeString

The namespace of the callee.

CalleeName

win:UnicodeString

The method the compiler is trying to tail call (not generate a call to).

CalleeNameSignature

win:UnicodeString

The signature for the callee.

TailPrefix

win:Boolean

The prefix for the tail call

FailReason

win:UnicodeString

The reason the tail call failed.

ClrInstanceID

win:UInt16

Unique ID for the instance of CLR or CoreCLR.

MethodJITTailCallSucceeded Event

The following table shows the keyword and level.

Keyword for raising the event

Level

JITTracingKeyword (0x10)

Verbose (5)

The following table shows the event information.

Event

Event ID

Raised when

MethodJitTailCallSucceeded

188

The method tail call succeeded.

The following table shows the event data.

Field name

Data type

Description

MethodBeingCompiledNameSpace

win:UnicodeString

Namespace of the method that is being compiled.

MethodBeingCompiledName

win:UnicodeString

Name of the method that is being compiled.

MethodBeingCompiledNameSignature

win:UnicodeString

Signature of the method that is being compiled.

CallerNamespace

win:UnicodeString

The namespace of the method the JIT compiler is attempting to generate code for.

CallerName

win:UnicodeString

The name of the method the compiler is attempting to generate code for.

CallerNameSignature

win:UnicodeString

The signature for the caller.

CalleeNamespace

win:UnicodeString

The namespace of the callee.

CalleeName

win:UnicodeString

The method the compiler is trying to tail call (not generate a call to).

CalleeNameSignature

win:UnicodeString

The signature for the callee.

TailPrefix

win:Boolean

The prefix for the tail call.

TailCallType

win:UnicodeString

The type of the tail call.

ClrInstanceID

win:UInt16

Unique ID for the instance of CLR or CoreCLR.

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