| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <algorithm> |
| #include <cstring> |
| #include <fstream> |
| #include <iostream> |
| #include <jni.h> |
| #include <numeric> |
| #include <sstream> |
| #include <string> |
| #include <tuple> |
| #include <unistd.h> |
| |
| #include <android/log.h> |
| #define LOG(...) __android_log_write(ANDROID_LOG_INFO, "ALLOC-STRESS", __VA_ARGS__) |
| |
| using namespace std; |
| |
| size_t s = 8 * (1 << 20); // 8 MB |
| void *gptr; |
| extern "C" JNIEXPORT void JNICALL |
| Java_com_android_server_cts_device_statsdatom_StatsdCtsForegroundActivity_cmain( |
| JNIEnv *, jobject /* this */) { |
| long long allocCount = 0; |
| while (1) { |
| char *ptr = (char *)malloc(s); |
| memset(ptr, (int)allocCount >> 10, s); |
| for (int i = 0; i < s; i += 4096) { |
| *((long long *)&ptr[i]) = allocCount + i; |
| } |
| allocCount += s; |
| std::stringstream ss; |
| ss << "total alloc: " << allocCount / (1 << 20); |
| LOG(ss.str().c_str()); |
| gptr = ptr; |
| |
| // If we are too aggressive allocating, we will end up triggering the |
| // OOM reaper instead of LMKd. |
| usleep(1000); |
| } |
| } |