[11u] RFR: 8222518: Remove unnecessary caching of Parker object in java.lang.Thread

[Hohensee, Paul]

I've added performance data to the JBS issue (https://bugs.openjdk.java.net/browse/JDK-8222518).

Thanks,
Paul

-----Original Message-----
From: jdk-updates-dev <jdk-updates-dev-retn at openjdk.java.net> on behalf of Andrew Haley <aph at redhat.com>
Date: Tuesday, January 12, 2021 at 2:36 AM
To: "jdk-updates-dev at openjdk.java.net" <jdk-updates-dev at openjdk.java.net>
Subject: RE: [11u] RFR: 8222518: Remove unnecessary caching of Parker object in java.lang.Thread

On 12/23/20 4:13 PM, Hohensee, Paul wrote:
> I've little knowledge or experience in the area of hotspot thread synchronization. With that disclaimer, the patch looks benign to me but I would want to hear another expert's assessment before being able to approve this with a good conscience.
>
> I could ask Richard from our team (on cc) to have a look when he's back from vacation. Or feel free to find somebody else to review and assess this backport from a technical pov.

This area does seem to ave changed a fair bit. Do we know if the
performance analysis done by David Holmes in 2019 is valid for JDK 11?
We should check that it is before applying this.

--
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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