Metric name disambiguation #4938
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In .NET 8.0 we added tags on Meters and Instruments but MetricsEventSource only included the names when emitting value publishing events. This made it ambiguous when there was more than one Meter or Instrument with the same name. In 9.0 MetricsEventSource started included InstrumentIDs in the BeginInstrumentReporting events and in the value publishing events that provides a stronger correlation identifier. This change consumes the IDs in those events within Microsoft.Diagnostics.Monitoring.EventPipe, allowing dotnet-counters (and presumably dotnet-monitor too) to track time series that differ only by the tags provided to the Meter/Instrument constructors. I also re-enabled a disabled test that got broken .NET 9.0 added the System.Runtime Meter. Fixes dotnet#4843, dotnet#4564
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@dotnet/dotnet-monitor - I have unit tests on Monitoring.EventPipe and tested dotnet-counters manually, but I haven't tested dotnet-monitor with this change. Do you guys want to try it out the next time you pull a build of Monitoring.EventPipe or is there some testing you'd like me to do in advance? |
kkeirstead
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Sep 17, 2024
src/Microsoft.Diagnostics.Monitoring.EventPipe/Counters/TraceEventExtensions.cs
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kkeirstead
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Sep 17, 2024
src/Microsoft.Diagnostics.Monitoring.EventPipe/Counters/TraceEventExtensions.cs
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noahfalk
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Sep 18, 2024
src/Microsoft.Diagnostics.Monitoring.EventPipe/Counters/TraceEventExtensions.cs
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@kkeirstead - Thanks for taking a look! I updated the comments a bit. Let me know if you still have concerns about the metadata change on BeginInstrumentReporting or anything else. |
tommcdon
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Sep 19, 2024
src/Microsoft.Diagnostics.Monitoring.EventPipe/Counters/TraceEventExtensions.cs
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wiktork
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In .NET 8.0 we added tags on Meters and Instruments but MetricsEventSource only included the names when emitting value publishing events. This made it ambiguous when there was more than one Meter or Instrument with the same name. In 9.0 MetricsEventSource started included InstrumentIDs in the BeginInstrumentReporting events and in the value publishing events that provides a stronger correlation identifier. This change consumes the IDs in those events within Microsoft.Diagnostics.Monitoring.EventPipe, allowing dotnet-counters (and presumably dotnet-monitor too) to track time series that differ only by the tags provided to the Meter/Instrument constructors.
I also re-enabled a disabled test that got broken when .NET 9.0 added the System.Runtime Meter.
Fixes #4843, #4564