Integrated: 8286893: G1: Recent card set coarsening statistics wrong

[tqxia]

On Thu, 19 May 2022 09:41:27 GMT, tqxia <duke at openjdk.java.net> wrote:

> Looking at G1CardSet::print_coarsen_stats() the recent coarsening stats are calculated by:
> 
> current total coarsening - coarsening happened in previous (the one before the latest) GC cycle
> 
> but should be
> 
> current total coarsening - previous total coarsening
> 
> 
> 
> A sample output after the commit:
> GC(71) Coarsening (recent): Inline->AoC 62300 (202) AoC->Howl 6879 (163) Howl->Full 0 (0) Inline->AoC 52757 (123) AoC->BitMap 3750 (498) BitMap->Full 0 (0)
> GC(71) Coarsening (all): Inline->AoC 7032200 (8895) AoC->Howl 2167925 (13809) Howl->Full 0 (0) Inline->AoC 16892632 (11060) AoC->BitMap 300358 (32143) BitMap->Full 0 (0)
> GC(72) Coarsening (recent): Inline->AoC 61664 (87) AoC->Howl 6430 (70) Howl->Full 0 (0) Inline->AoC 49677 (30) AoC->BitMap 3358 (179) BitMap->Full 0 (0)
> GC(72) Coarsening (all): Inline->AoC 7093864 (8982) AoC->Howl 2174355 (13879) Howl->Full 0 (0) Inline->AoC 16942309 (11090) AoC->BitMap 303716 (32322) BitMap->Full 0 (0)
> GC(74) Coarsening (recent): Inline->AoC 807201 (57) AoC->Howl 13360 (48) Howl->Full 0 (0) Inline->AoC 94560 (30) AoC->BitMap 29545 (190) BitMap->Full 0 (0)
> GC(74) Coarsening (all): Inline->AoC 7901065 (9039) AoC->Howl 2187715 (13927) Howl->Full 0 (0) Inline->AoC 17036869 (11120) AoC->BitMap 333261 (32512) BitMap->Full 0 (0)
> GC(75) Coarsening (recent): Inline->AoC 137571 (258) AoC->Howl 70042 (659) Howl->Full 0 (0) Inline->AoC 543734 (461) AoC->BitMap 5747 (937) BitMap->Full 0 (0)
> GC(75) Coarsening (all): Inline->AoC 8038636 (9297) AoC->Howl 2257757 (14586) Howl->Full 0 (0) Inline->AoC 17580603 (11581) AoC->BitMap 339008 (33449) BitMap->Full 0 (0)
> 
> 
> 
> Testing: tier1

This pull request has now been integrated.

Changeset: 828dc89a
Author:    tqxia <txiadev at gmail.com>
Committer: Hui Shi <hshi at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/828dc89ab83682b0e08f056b6ca557967d5b3ee5
Stats:     14 lines in 2 files changed: 13 ins; 0 del; 1 mod

8286893: G1: Recent card set coarsening statistics wrong

Reviewed-by: tschatzl, ayang

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PR: https://git.openjdk.java.net/jdk/pull/8785