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Commit 28a5a1d5 authored by Jagadeesh Pakaravoor's avatar Jagadeesh Pakaravoor
Browse files

Add madvising of .odex, .vdex and .art files 

1. When mmaping {.art, .odex, .vdex} files madvise them to
MADV_WILLNEED
2. Add system properties to limit the madvise size/range

Test: presubmit
Bug: 178853586
Change-Id: I7bd882e3e1021d48f00f297c4dd1d5a8098c087d
parent 36f5f53a

core/jni/AndroidRuntime.cpp

+22 −0
Original line number Diff line number Diff line
@@ -630,6 +630,12 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv, bool zygote, bool p 
    char saveResolvedClassesDelayMsOptsBuf[

            sizeof("-Xps-save-resolved-classes-delay-ms:")-1 + PROPERTY_VALUE_MAX];

    char madviseRandomOptsBuf[sizeof("-XX:MadviseRandomAccess:")-1 + PROPERTY_VALUE_MAX];

    char madviseWillNeedFileSizeVdex[

            sizeof("-XMadviseWillNeedVdexFileSize:")-1 + PROPERTY_VALUE_MAX];

    char madviseWillNeedFileSizeOdex[

            sizeof("-XMadviseWillNeedOdexFileSize:")-1 + PROPERTY_VALUE_MAX];

    char madviseWillNeedFileSizeArt[

            sizeof("-XMadviseWillNeedArtFileSize:")-1 + PROPERTY_VALUE_MAX];

    char gctypeOptsBuf[sizeof("-Xgc:")-1 + PROPERTY_VALUE_MAX];

    char backgroundgcOptsBuf[sizeof("-XX:BackgroundGC=")-1 + PROPERTY_VALUE_MAX];

    char heaptargetutilizationOptsBuf[sizeof("-XX:HeapTargetUtilization=")-1 + PROPERTY_VALUE_MAX];
@@ -837,6 +843,22 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv, bool zygote, bool p 
     */

    parseRuntimeOption("dalvik.vm.madvise-random", madviseRandomOptsBuf, "-XX:MadviseRandomAccess:");



    /*

     * Use default platform configuration as limits for madvising,

     * when no properties are specified.

     */

    parseRuntimeOption("dalvik.vm.madvise.vdexfile.size",

                       madviseWillNeedFileSizeVdex,

                       "-XMadviseWillNeedVdexFileSize:");



    parseRuntimeOption("dalvik.vm.madvise.odexfile.size",

                       madviseWillNeedFileSizeOdex,

                       "-XMadviseWillNeedOdexFileSize:");



    parseRuntimeOption("dalvik.vm.madvise.artfile.size",

                       madviseWillNeedFileSizeArt,

                       "-XMadviseWillNeedArtFileSize:");



    /*

     * Profile related options.

     */