[Discuss] backport - parallel heap inspection for different GC Heap(Internet mail)

[linzang(臧琳)]

Hi Paul,
     Yes, it should be 15u, not 14u, Thanks! I will first start from 11u for backporting and add CMS support. 
BRs,
Lin

On 2020/11/13, 12:06 AM, "Hohensee, Paul" <hohensee at amazon.com> wrote:

    You mean 15u, not 14u, right? Because 14u is an orphan release afaik.

    I'm ok with adding "parallel" as a jmap command line option. It's purely additive, and so doesn't break existing code. You'll need backport CSRs, and you'll definitely have to add 11u CMS support.

    Thanks,
    Paul

    On 11/12/20, 2:42 AM, "jdk-updates-dev on behalf of linzang(臧琳)" <jdk-updates-dev-retn at openjdk.java.net on behalf of linzang at tencent.com> wrote:

        Dear All,
             Recently I have made an enhancement that inspect heap parallelly for different GC heap (PSS, G1, Shenandoah and Z) and the patches have been pushed to jdk master. The result show significant speedup of “jmap -histo”.
             I am planing to backport them to jdk14u and jdk11u, and also add CMS Support if needed, but I want to know whether it will be accept before starting the real work, because it add “parallel” option to jmap command, which may affect compatibility.
             May I ask your opinion about it? Thanks.

             FYI. The original bug: https://bugs.openjdk.java.net/browse/JDK-8214535

        BRs,
        Lin