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  1. JDK
  2. JDK-8239140 Backport JFR to OpenJDK 8
  3. JDK-8240687

Release Note: JDK Flight Recorder Integrated to OpenJDK 8u

    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: openjdk8u262
    • Fix Version/s: None
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
      jfr

      Description

      OpenJDK 8u now contains the backport of JEP 328: Flight Recorder (https://openjdk.java.net/jeps/328) from later versions of OpenJDK.

      JFR is a low-overhead framework to collect and provide data helpful to troubleshoot the performance of the OpenJDK runtime and of Java applications. It consists of a new API to define custom events under the jdk.jfr namespace and a JMX interface to interact with the framework. The recording can also be initiated with the application startup using the -XX:+FlightRecorder flag or via jcmd. JFR replaces the +XX:EnableTracing feature introduced in JEP 167 providing a more efficient way to retrieve the same information. For compatibility reason +XX:EnableTracing is still accepted, however no data will be printed.

      JFR It is not built by default. Downstream distributions need to pass the --enable-jfr flag at configure time.

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            • Assignee:
              neugens Mario Torre
              Reporter:
              shade Aleksey Shipilev
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                Updated:
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