Integrated: 8259404: Shenandoah: Fix time tracking in parallel_cleaning

[Zhengyu Gu]

On Thu, 14 Jan 2021 01:39:02 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> Please review this patch fixes timing tracking for parallel cleaning.
> 
> Before:
> `[9.844s][info][gc,stats] System Purge = 0.000 s (a = 76 us) (n = 1) (lvls, us = 76, 76, 76, 76, 76)` **<<== looks wrong**
> `[9.844s][info][gc,stats] Unload Classes = 0.001 s (a = 541 us) (n = 1) (lvls, us = 541, 541, 541, 541, 541)`
> `[9.844s][info][gc,stats] Weak Roots = 0.000 s (a = 75 us) (n = 1) (lvls, us = 75, 75, 75, 75, 75)`
> `[9.844s][info][gc,stats] CLDG = 0.000 s (a = 0 us) (n = 1) (lvls, us = 0, 0, 0, 0, 0)`
> After:
> `[9.936s][info][gc,stats] System Purge = 0.001 s (a = 611 us) (n = 1) (lvls, us = 609, 609, 609, 609, 611)`
> `[9.936s][info][gc,stats] Unload Classes = 0.000 s (a = 475 us) (n = 1) (lvls, us = 475, 475, 475, 475, 475)`
> `[9.936s][info][gc,stats] DCU: <total> = 0.000 s (a = 162 us) (n = 1) (lvls, us = 160, 160, 160, 160, 162)`
> `[9.936s][info][gc,stats] DCU: Code Cache Roots = 0.000 s (a = 162 us) (n = 1) (lvls, us = 160, 160, 160, 160, 162)`
> `[9.936s][info][gc,stats] Weak Roots = 0.000 s (a = 105 us) (n = 1) (lvls, us = 105, 105, 105, 105, 105)`
> `[9.936s][info][gc,stats] DWR: <total> = 0.000 s (a = 210 us) (n = 1) (lvls, us = 209, 209, 209, 209, 210)`
> `[9.936s][info][gc,stats] DWR: VM Weak Roots = 0.000 s (a = 210 us) (n = 1) (lvls, us = 209, 209, 209, 209)`

This pull request has now been integrated.

Changeset: a5fb5173
Author:    Zhengyu Gu <zgu at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/a5fb5173
Stats:     63 lines in 5 files changed: 25 ins; 16 del; 22 mod

8259404: Shenandoah: Fix time tracking in parallel_cleaning

Reviewed-by: shade

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PR: https://git.openjdk.java.net/jdk/pull/2073