Jaroslav Bachorik

JMC-7855: JFR Writer incorrectly uses epoch nanoseconds as the start ticks

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Currently, the JFR recordings created by the JMC writer will have the start ticks set to the same value as the start timestamp. This will cause problems with the duration...

# What Does This Do dummy PR to trigger CI test build # Motivation # Additional Notes

Submission @jbachorik

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Thanks for a very interesting 'etude' :) Here is something using just plain Java with a bit of mmapping and direct byte buffers. Didn't use any of the new shiny...

@jbachorik (reduce branches)

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An improvement over my initial submission. Still pure Java ByteBuffer implementation, no Unsafe nor Vector API nor FFI. I think the performance is competitive compared to the solutions using eg....

7992: Add API to easily write annotated Java JFR events

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This PR extends the JFR Writer API with the ability to use the custom JFR event types (eg. classes extending `jdk.jfr.Event`) and register new writer type for them and also...

[DNM] JFR Context Integration PoC

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A trivial PoC to provide integration with the JFR Context prototype implementation. ### How to build and use 1. Clone https://github.com/DataDog/openjdk-jdk21/tree/jb/jfr_context_bp and build the JFR Context prototype OpenJDK 21 2....

For unknown reasons the JDK 22 `Console` is writing by default to stderr. This will confuse the functional tests. The workaround is not to use console for JDK 22 until...

A prototype to use jfr streaming to produce metrics

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# What Does This Do This is a simple prototype of how to extract JFR data into statsd metrics using JFR streaming. # Motivation A PoC of the functionality to...

8325465: JFR: Context filtering

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A preliminary PoC work for JFR contextual event (Based on initial discussion in https://github.com/skogsluft/jdk-skogsluft/discussions/4) # Contextual Events Contextual events, as the name suggests, are to be used to provide additional...