Integrated: 8366896: JFR: Use GarbageCollection.name in gc view

[Erik Gahlin]

On Thu, 4 Sep 2025 14:35:07 GMT, Erik Gahlin <egahlin at openjdk.org> wrote:

> Could I have a review of a PR that fixes the 'jfr gc view'?
> 
> 
> Before:
> 
>     $ jfr view gc z.jfr
>     
>                                   Garbage Collections
>     
>     Start    GC ID Type                  Heap Before GC Heap After GC Longest Pause
>     -------- ----- --------------------- -------------- ------------- -------------
>     N/A         61 Unknown                       5.2 GB           N/A           N/A
>     N/A         63 Unknown                       7.2 GB           N/A           N/A
>     16:13:43     0 Unknown                     868.0 MB        1.6 GB    0.00808 ms
>     16:13:43     1 Unknown                       1.7 GB        3.8 GB    0.00796 ms
>     16:13:44     2 Unknown                       3.8 GB        9.0 GB     0.0136 ms
>     
>     $ jfr view gc shen.jfr
>     
>                                   Garbage Collections
>     
>     Start    GC ID Type                  Heap Before GC Heap After GC Longest Pause
>     -------- ----- --------------------- -------------- ------------- -------------
>     16:16:07     0 Unknown                       2.3 GB        4.9 GB      0.139 ms
>     16:16:08     1 Unknown                       4.9 GB        6.3 GB     0.0693 ms
>     16:16:09     2 Unknown                       6.3 GB        1.2 GB     0.0812 ms
>     16:16:09     3 Unknown                       1.8 GB        5.2 GB     0.0824 ms
>     16:16:09     4 Unknown                       5.2 GB        9.0 GB     0.0930 ms
>     
>     $ jfr view gc g1.jfr
>     
>                                     Garbage Collections
>     
>     Start    GC ID Type                     Heap Before GC Heap After GC Longest Pause
>     -------- ----- ------------------------ -------------- ------------- -------------
>     14:45:23     0 Young Garbage Collection        49.1 MB       14.2 MB       2.52 ms
>     14:45:24     1 Old Garbage Collection          46.2 MB       24.6 MB       16.1 ms
>     14:45:24     2 Old Garbage Collection          40.6 MB       24.6 MB       12.0 ms
>     14:45:25     3 Young Garbage Collection        40.6 MB       41.2 MB      0.946 ms
>     14:45:25     4 Old Garbage Collection          41.2 MB       49.2 MB           0 s
>     
>     $ jfr view gc serial.jfr
>     
>                                     Garbage Collections
>     
>     Start    GC ID Type                     Heap Before GC Heap After GC Longest Pause
>     -------- ----- ------------------------ -------------- ------------- -------------
>     16:33:59     0 Young Garbage Collection       154.8 MB       83.2 MB       41.5 ms
>    ...

This pull request has now been integrated.

Changeset: 77a71c5b
Author:    Erik Gahlin <egahlin at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/77a71c5b097500ea2cab0c84f87553e833692fd2
Stats:     8 lines in 3 files changed: 0 ins; 2 del; 6 mod

8366896: JFR: Use GarbageCollection.name in gc view

Reviewed-by: mgronlun

-------------

PR: https://git.openjdk.org/jdk/pull/27099