Integrated: 8351266: JFR: -XX:StartFlightRecording:report-on-exit

[Erik Gahlin]

On Sun, 9 Mar 2025 23:34:39 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Could I have a review of an enhancement that prints 'jfr view' when the JVM exits? The purpose is to simplify usage and avoid the need to dump to a file.
> 
> For more details, see the [CSR](https://bugs.openjdk.org/browse/JDK-8351370) 
> 
> Example usage:
> 
>     $ java -XX:StartFlightRecording:report-on-exit=hot-methods ...
>     [0.166s][info][jfr,startup] Started recording 1. No limit specified, using maxsize=250MB as default.
>     [0.166s][info][jfr,startup] 
>     [0.166s][info][jfr,startup] Use jcmd 66977 JFR.dump name=1 filename=FILEPATH to copy recording data to file.
>     
>                                               Java Methods that Executes the Most
>     
>     Method                                                                                                  Samples Percent
>     ------------------------------------------------------------------------------------------------------- ------- -------
>     sun.java2d.marlin.Renderer._endRendering(int, int)                                                          120  33.99%
>     sun.java2d.marlin.MarlinTileGenerator.getAlphaRLE(byte[], int, int)                                          22   6.23%
>     sun.awt.image.PNGImageDecoder.produceImage()                                                                 19   5.38%
>     sun.java2d.marlin.MarlinCache.copyAARowRLE_WithBlockFlags(int[], int[], int, int, int)                       14   3.97%
>     sun.java2d.marlin.MarlinTileGenerator.getAlphaNoRLE(byte[], int, int)                                         7   1.98%
>     sun.java2d.marlin.Renderer.copyAARow(int[], int, int, int, boolean)                                           7   1.98%
>     sun.awt.image.PNGImageDecoder.filterRow(byte[], byte[], int, int, int)                                        7   1.98%
>     sun.java2d.marlin.MarlinCache.copyAARowNoRLE(int[], int, int, int)                                            5   1.42%
>     sun.java2d.pipe.BufferedContext.validate(...)                                                                 5   1.42%
>     java.awt.GradientPaintContext.clipFillRaster(int[], int, int, int, int, double, double, double)               3   0.85%
> 
> Testing: jdk/jdk/jfr

This pull request has now been integrated.

Changeset: 248c373b
Author:    Erik Gahlin <egahlin at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/248c373b5b066b6b3eaa5a7461f30733f30b0a13
Stats:     314 lines in 15 files changed: 297 ins; 3 del; 14 mod

8351266: JFR: -XX:StartFlightRecording:report-on-exit

Reviewed-by: mgronlun

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PR: https://git.openjdk.org/jdk/pull/23958