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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <jni.h>
     18 #include <stdlib.h>
     19 #include <string.h>
     20 #include <sys/time.h>
     21 
     22 double currentTimeMillis()
     23 {
     24     struct timeval tv;
     25     gettimeofday(&tv, (struct timezone *) NULL);
     26     return tv.tv_sec * 1000.0 + tv.tv_usec / 1000.0;
     27 }
     28 
     29 extern "C" JNIEXPORT jdouble JNICALL Java_android_dram_cts_MemoryNative_runMemcpy(JNIEnv* env,
     30         jclass clazz, jint bufferSize, jint repetition)
     31 {
     32     char* src = new char[bufferSize];
     33     char* dst = new char[bufferSize];
     34     if ((src == NULL) || (dst == NULL)) {
     35         delete[] src;
     36         delete[] dst;
     37         env->ThrowNew(env->FindClass("java/lang/OutOfMemoryError"), "No memory");
     38         return -1;
     39     }
     40     memset(src, 0, bufferSize);
     41     memset(dst, 0, bufferSize);
     42     double start = currentTimeMillis();
     43     for (int i = 0; i < repetition; i++) {
     44         memcpy(dst, src, bufferSize);
     45         src[bufferSize - 1] = i & 0xff;
     46     }
     47     double end = currentTimeMillis();
     48     delete[] src;
     49     delete[] dst;
     50     return end - start;
     51 }
     52 
     53 extern "C" JNIEXPORT jdouble JNICALL Java_android_dram_cts_MemoryNative_runMemset(JNIEnv* env,
     54         jclass clazz, jint bufferSize, jint repetition, jint c)
     55 {
     56     char* dst = new char[bufferSize];
     57     if (dst == NULL) {
     58         delete[] dst;
     59         env->ThrowNew(env->FindClass("java/lang/OutOfMemoryError"), "No memory");
     60         return -1;
     61     }
     62     memset(dst, 0, bufferSize);
     63     double start = currentTimeMillis();
     64     for (int i = 0; i < repetition; i++) {
     65         memset(dst, (c + i) & 0xff, bufferSize);
     66     }
     67     double end = currentTimeMillis();
     68     delete[] dst;
     69     return end - start;
     70 }
     71 
     72