> This PR guards usage of FileForce, SocketRead, and SocketWrite events with > `jfrTracing` to prevent those classes from being loaded when JFR is not in > use. This is the same technique as what's currently used with exception > events and FileRead/FileWrite events. > > I used NMT and a simple test app that exercises file force and socket IO > paths to check for a difference in memory usage. > **NMT Before:** > Classes=1188, Metadata used=966064 B, Class space used=93008 B > **NMT After:** > Classes=1182, Metadata used=943728 B, Class space used=89456 B > Note that the difference in amount used doesn't actually change amount > committed because the backing memory is pre-allocated in chunks with larger > granularity. > > Testing: > - new test test/jdk/jdk/jfr/event/io/TestEventsNotLoadedWithoutJfr.java to > check the guards work properly > - tier 1 > > --------- > - [x] I confirm that I make this contribution in accordance with the [OpenJDK > Interim AI Policy](https://openjdk.org/legal/ai).
Robert Toyonaga has updated the pull request incrementally with two additional commits since the last revision: - use feedback to improve test - update copywrite headers ------------- Changes: - all: https://git.openjdk.org/jdk/pull/30948/files - new: https://git.openjdk.org/jdk/pull/30948/files/3394e886..d28d941a Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=30948&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=30948&range=01-02 Stats: 100 lines in 10 files changed: 6 ins; 51 del; 43 mod Patch: https://git.openjdk.org/jdk/pull/30948.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30948/head:pull/30948 PR: https://git.openjdk.org/jdk/pull/30948
