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Commit 5eee004b authored by Mathieu Chartier's avatar Mathieu Chartier
Browse files

Add system property for hot startup method threshold 

The property is dalvik.vm.hot-startup-method-samples, setting this
controls how many startup samples are required before methods are
marked as hot in the profile.

Test: adb shell setprop dalvik.vm.hot-startup-method-samples 12
Test: adb shell setprop dalvik.vm.extra-opts -verbose:profiler
Test: adb logcat | grep Profile

Bug: 36457259

Change-Id: If8e37a160802a00fb44f0c243fb358df02104741
parent 28f6dc95

core/jni/AndroidRuntime.cpp

+7 −0
Original line number Diff line number Diff line
@@ -613,6 +613,7 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv, bool zygote) 
    char useJitProfilesOptsBuf[sizeof("-Xjitsaveprofilinginfo:")-1 + PROPERTY_VALUE_MAX];

    char jitprithreadweightOptBuf[sizeof("-Xjitprithreadweight:")-1 + PROPERTY_VALUE_MAX];

    char jittransitionweightOptBuf[sizeof("-Xjittransitionweight:")-1 + PROPERTY_VALUE_MAX];

    char hotstartupsamplesOptsBuf[sizeof("-Xps-hot-startup-method-samples:")-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];
@@ -739,6 +740,12 @@ int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv, bool zygote) 
                       jittransitionweightOptBuf,

                       "-Xjittransitionweight:");



    /*

     * Profile related options.

     */

    parseRuntimeOption("dalvik.vm.hot-startup-method-samples", hotstartupsamplesOptsBuf,

            "-Xps-hot-startup-method-samples:");



    property_get("ro.config.low_ram", propBuf, "");

    if (strcmp(propBuf, "true") == 0) {

      addOption("-XX:LowMemoryMode");