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Commit c01936a6 authored by Mathieu Chartier's avatar Mathieu Chartier
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Add property for background GC type 

To disable background compaction do:
adb shell setprop dalvik.vm.backgroundgctype CMS

To enable:
adb shell setprop dalvik.vm.backgroundgctype SS

Change-Id: I1d87b95fceaedac4df5ce6e718d7c14b35d524cc
parent bcf76242

core/jni/AndroidRuntime.cpp

+8 −0
Original line number Diff line number Diff line
@@ -467,6 +467,7 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv) 
    char heapminfreeOptsBuf[sizeof("-XX:HeapMinFree=")-1 + PROPERTY_VALUE_MAX];

    char heapmaxfreeOptsBuf[sizeof("-XX:HeapMaxFree=")-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];

    char jitcodecachesizeOptsBuf[sizeof("-Xjitcodecachesize:")-1 + PROPERTY_VALUE_MAX];

    char dalvikVmLibBuf[PROPERTY_VALUE_MAX];
@@ -620,6 +621,13 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv) 
        mOptions.add(opt);

    }



    strcpy(backgroundgcOptsBuf, "-XX:BackgroundGC=");

    property_get("dalvik.vm.backgroundgctype", backgroundgcOptsBuf+sizeof("-XX:BackgroundGC=")-1, "");

    if (backgroundgcOptsBuf[sizeof("-XX:BackgroundGC=")-1] != '\0') {

        opt.optionString = backgroundgcOptsBuf;

        mOptions.add(opt);

    }



    /*

     * Enable or disable dexopt features, such as bytecode verification and

     * calculation of register maps for precise GC.