absoluteMaxSize dalvik.vm.heapsize

d:\linux\linuxkernel\WORKING_DIRECTORY\android-omap-20111108-gingerbread\dalvik\vm\alloc\HeapSource.c

GcHeap *

dvmHeapSourceStartup(size_t startSize, size_t absoluteMaxSize)

{

    /*

     * Allocate a contiguous region of virtual memory to subdivided

     * among the heaps managed by the garbage collector.

     */

    length = ALIGN_UP_TO_PAGE_SIZE(absoluteMaxSize);

//    base = dvmAllocRegion(length, PROT_NONE, "dalvik-heap");

//doesn't support PROT_NONE on windows

    base = dvmAllocRegion(length, PROT_READ | PROT_WRITE, "dalvik-heap");

d:\linux\linuxkernel\WORKING_DIRECTORY\android-omap-20111108-gingerbread\dalvik\vm\alloc\Heap.c

bool dvmHeapStartup()

{

    gcHeap = dvmHeapSourceStartup(gDvm.heapSizeStart, gDvm.heapSizeMax);

d:\linux\linuxkernel\WORKING_DIRECTORY\android-omap-20111108-gingerbread\dalvik\vm\alloc\Alloc.c

bool dvmGcStartup(void)

{

    dvmInitMutex(&gDvm.gcHeapLock);

 

 

    return dvmHeapStartup();

}

d:\linux\linuxkernel\WORKING_DIRECTORY\android-omap-20111108-gingerbread\dalvik\vm\Init.c

static int dvmProcessOptions(int argc, const char* const argv[],

    bool ignoreUnrecognized)

{

        } else if (strncmp(argv[i], "-Xmx", 4) == 0) {

int dvmStartup(int argc, const char* const argv[], bool ignoreUnrecognized,

    JNIEnv* pEnv)

{

    setCommandLineDefaults();

    cc = dvmProcessOptions(argc, argv, ignoreUnrecognized);

if (!dvmGcStartup())

int dvmPrepForDexOpt(const char* bootClassPath, DexOptimizerMode dexOptMode,

    DexClassVerifyMode verifyMode, int dexoptFlags)

{

    setCommandLineDefaults();

if (!dvmGcStartup())

d:\linux\linuxkernel\WORKING_DIRECTORY\ango\angowx\android\AndroidRuntime\AndroidRuntime.cpp

int AndroidRuntime::startVm(JavaVM** pJavaVM, JNIEnv** pEnv)

{

    strcpy(heapsizeOptsBuf, "-Xmx");

    property_get("dalvik.vm.heapsize", heapsizeOptsBuf+4, "16m");

    opt.optionString = heapsizeOptsBuf;

    mOptions.add(opt);www.zzzyk.com

    if (JNI_CreateJavaVM(pJavaVM, pEnv, &initArgs) < 0) {

D:\linux\linuxkernel\WORKING_DIRECTORY\android-omap-20111108-gingerbread\dalvik\vm\Jni.c

    if (dvmStartup(argc, argv, args->ignoreUnrecognized, (JNIEnv*)pEnv) != 0) {

 

 

d:\linux\linuxkernel\WORKING_DIRECTORY\android-omap-20111108-gingerbread\dalvik\vm\Init.c

static void setCommandLineDefaults()

{

    /* Defaults overridden by -Xms and -Xmx.

     * TODO: base these on a system or application-specific default

     */

    gDvm.heapSizeStart = 2 * 1024 * 1024;   // Spec says 16MB; too big for us.

//    gDvm.heapSizeMax = 16 * 1024 * 1024;    // Spec says 75% physical mem

    gDvm.heapSizeMax = 32 * 1024 * 1024;    // Spec says 75% physical mem

补充：移动开发 , Android ,