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  1. JDK
  2. JDK-8213927

G1 ignores AlwaysPreTouch when UseTransparentHugePages is enabled

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    • gc
    • b22
    • x86
    • linux

    Backports

      Description

         A DESCRIPTION OF THE PROBLEM :
        G1 ignores AlwaysPreTouch when UseTransparentHugePages is enabled

        REGRESSION : Last worked in version 8u181

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        time java -XX:+UseG1GC -Xmx10g -Xms10g -XX:+AlwaysPreTouch -XX:+UseTransparentHugePages HelloWorld

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        Hello, World

        real 0m4.737s
        user 0m0.417s
        sys 0m4.349s
        ACTUAL -
        Hello, World

        real 0m0.418s
        user 0m0.168s
        sys 0m0.314s

        ---------- BEGIN SOURCE ----------
        public class HelloWorld {
            public static void main(String[] args) {
                System.out.println("Hello, World");
            }
        }
        ---------- END SOURCE ----------

        FREQUENCY : always


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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8318960 G1 ignores AlwaysPreTouch when UseTransparentHugePages is enabled

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8322188 G1 ignores AlwaysPreTouch when UseTransparentHugePages is enabled

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8220153 Shenandoah does not work with TransparentHugePages properly

            • P3 - Major loss of function.
            • Resolved

            Enhancement - null JDK-8157952 Parallelize Memory Pretouch

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk11u-dev/4543378d

            Review Review openjdk/jdk11u-dev/2355

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                tschatzl Thomas Schatzl
                webbuggrp Webbug Group
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                Dates

                  Created:
                  Updated:
                  Resolved: