Script to show the average/peak memory usage for Android app.

mem_usage.sh

#!/bin/zsh

OUTPUT=""
PROCESS_EXISTS=false
PROCESS_STARTED=false

COUNT=0
JAVA_HEAP_TOTAL=0
NATIVE_HEAP_TTAL=0
JAVA_HEAP_AVG=0
NATIVE_HEAP_AVG=0
JAVA_HEAP_PEAK=0
NATIVE_HEAP_PEAK=0


check_process_exists() {
    echo $OUTPUT | grep "MEMINFO in pid" > /dev/null
    if [[ $? -eq 0 ]] ; then
        PROCESS_EXISTS=true
    else
        PROCESS_EXISTS=false
    fi
}

do_statistics() {
    ((COUNT+=1))

    # Check the dumpsys version
    echo $OUTPUT | grep "App Summary" > /dev/null
    if [[ $? -eq 0 ]] ; then
        old_dumpsys=false
    else
        old_dumpsys=true
    fi

    #echo $OUTPUT
    if [[ $old_dumpsys = true ]] ; then
        java_heap="$(echo "$OUTPUT" | grep "Dalvik" | awk '{print $6}' | tr -d '\r')"
    else
        java_heap="$(echo "$OUTPUT" | grep "Dalvik Heap[^:]" | awk '{print $8}' | tr -d '\r')"
    fi
    ((JAVA_HEAP_TOTAL+=java_heap))
    ((JAVA_HEAP_AVG=JAVA_HEAP_TOTAL/COUNT))
    if [[ $java_heap -gt $JAVA_HEAP_PEAK ]] ; then
        JAVA_HEAP_PEAK=$java_heap
    fi

    if [[ $old_dumpsys = true ]] ; then
        native_heap="$(echo "$OUTPUT" | grep "Native" | awk '{print $6}' | tr -d '\r')"
    else
        native_heap="$(echo "$OUTPUT" | grep "Native Heap[^:]" | awk '{print $8}' | tr -d '\r' | tr -d '\n')"
    fi
    ((NATIVE_HEAP_TOTAL+=native_heap))
    ((NATIVE_HEAP_AVG=NATIVE_HEAP_TOTAL/COUNT))
    if [[ $native_heap -gt $NATIVE_HEAP_PEAK ]] ; then
        NATIVE_HEAP_PEAK=$native_heap
    fi

    echo "Java Heap: "$java_heap"KB Java Heap Average: "$JAVA_HEAP_AVG"KB Java Heap Peak: "$JAVA_HEAP_PEAK"KB"
    echo "Native Heap: "$native_heap"KB Native Heap Average: "$NATIVE_HEAP_AVG"KB Native Heap Peak: "$NATIVE_HEAP_PEAK"KB"
}

while true ; do
    OUTPUT="$(adb shell dumpsys meminfo $1)"

    check_process_exists
    if [[ $PROCESS_EXISTS = false && $PROCESS_STARTED = true ]]  ; then
        echo "---- Results ----"
        echo "Java Heap Average: "$JAVA_HEAP_AVG"KB Java Heap Peak: "$JAVA_HEAP_PEAK"KB"
        echo "Native Heap Average: "$NATIVE_HEAP_AVG"KB Native Heap Peak: "$NATIVE_HEAP_PEAK"KB"
        exit 0
    fi
    if [[ $PROCESS_EXISTS = true && $PROCESS_STARTED = false ]] ; then
        PROCESS_STARTED=true
    fi

    if [[ $PROCESS_EXISTS = true ]] ; then
        do_statistics
    fi

    sleep 0.1
done