memtest.cpp revision 1348ce27ee9bb8e50a3294879c1523fa4b4d8f8b 
1/*
2 * Copyright (C) 2013 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 <stdio.h>
18#include <stdlib.h>
19#include <string.h>
20#include <ctype.h>
21#include <sys/time.h>
22#include <time.h>
23#include <unistd.h>
24#include <sys/resource.h>
25#include <sys/syscall.h>
26#include <sys/types.h>
27#include <sys/mman.h>
28
29#include "memtest.h"
30
31nsecs_t system_time()
32{
33    struct timespec t;
34    t.tv_sec = t.tv_nsec = 0;
35    clock_gettime(CLOCK_MONOTONIC, &t);
36    return nsecs_t(t.tv_sec)*1000000000LL + t.tv_nsec;
37}
38
39static void usage(char* p) {
40    printf("Usage: %s <test> <options>\n"
41           "<test> is one of the following:\n"
42           "  copy_bandwidth [--size BYTES_TO_COPY]\n"
43           "  write_bandwidth [--size BYTES_TO_WRITE]\n"
44           "  per_core_bandwidth [--size BYTES]\n"
45           "    --type copy_ldrd_strd | copy_ldmia_stmia | copy_vld_vst |\n"
46           "           copy_vldmia_vstmia | memcpy | write_strd | write_stmia |\n"
47           "           write_vst | write_vstmia | memset\n"
48           "  multithread_bandwidth [--size BYTES]\n"
49           "    --type copy_ldrd_strd | copy_ldmia_stmia | copy_vld_vst |\n"
50           "           copy_vldmia_vstmia | memcpy | write_strd | write_stmia |\n"
51           "           write_vst | write_vstmia | memset\n"
52           "    --num_threads NUM_THREADS_TO_RUN\n"
53           "  malloc [fill]\n"
54           "  madvise\n"
55           "  resampler\n"
56           "  crash\n"
57           "  stack (stack smasher)\n"
58           "  crawl\n"
59           , p);
60}
61
62int copy_bandwidth(int argc, char** argv);
63int write_bandwidth(int argc, char** argv);
64int per_core_bandwidth(int argc, char** argv);
65int multithread_bandwidth(int argc, char** argv);
66int malloc_test(int argc, char** argv);
67int madvise_test(int argc, char** argv);
68int crash_test(int argc, char** argv);
69int stack_smasher_test(int argc, char** argv);
70int crawl_test(int argc, char** argv);
71int fp_test(int argc, char** argv);
72
73typedef struct {
74    const char *cmd_name;
75    int (*func)(int argc, char** argv);
76} function_t;
77
78function_t function_table[] = {
79    { "malloc", malloc_test },
80    { "madvise", madvise_test },
81    { "crash", crash_test },
82    { "stack", stack_smasher_test },
83    { "crawl", crawl_test },
84    { "fp", fp_test },
85    { "copy_bandwidth", copy_bandwidth },
86    { "write_bandwidth", write_bandwidth},
87    { "per_core_bandwidth", per_core_bandwidth },
88    { "multithread_bandwidth", multithread_bandwidth },
89};
90
91int main(int argc, char** argv)
92{
93    if (argc == 1) {
94        usage(argv[0]);
95        return 0;
96    }
97    int err = -1;
98    for (unsigned int i = 0; i < sizeof(function_table)/sizeof(function_t); i++) {
99        if (strcmp(argv[1], function_table[i].cmd_name) == 0) {
100            err = (*function_table[i].func)(argc-1, argv+1);
101            break;
102        }
103    }
104    if (err) {
105        usage(argv[0]);
106    }
107    return err;
108}
109
110int malloc_test(int argc, char** argv)
111{
112    bool fill = (argc>=2 && !strcmp(argv[1], "fill"));
113    size_t total = 0;
114    size_t size = 0x40000000;
115    while (size) {
116        void* addr = malloc(size);
117        if (addr == 0) {
118            printf("size = %9zd failed\n", size);
119            size >>= 1;
120        } else {
121            total += size;
122            printf("size = %9zd, addr = %p (total = %9zd (%zd MB))\n",
123                    size, addr, total, total / (1024*1024));
124            if (fill) {
125                printf("filling...\n");
126                fflush(stdout);
127                memset(addr, 0, size);
128            }
129            size = size + (size>>1);
130        }
131    }
132    printf("done. allocated %zd MB\n", total / (1024*1024));
133    return 0;
134}
135
136int madvise_test(int argc, char** argv)
137{
138    for (int i=0 ; i<2 ; i++) {
139        size_t size = i==0 ? 4096 : 48*1024*1024; // 48 MB
140        printf("Allocating %zd MB... ", size/(1024*1024)); fflush(stdout);
141        void* addr1 = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
142        printf("%p (%s)\n", addr1, addr1==(void*)-1 ? "failed" : "OK"); fflush(stdout);
143
144        printf("touching %p...\n", addr1); fflush(stdout);
145        memset(addr1, 0x55, size);
146
147        printf("advising DONTNEED...\n"); fflush(stdout);
148        madvise(addr1, size, MADV_DONTNEED);
149
150        printf("reading back %p...\n", addr1); fflush(stdout);
151        if (*(long*)addr1 == 0) {
152            printf("madvise freed some pages\n");
153        } else if (*(long*)addr1 == 0x55555555) {
154            printf("pages are still there\n");
155        } else {
156            printf("getting garbage back\n");
157        }
158
159        printf("Allocating %zd MB... ", size/(1024*1024)); fflush(stdout);
160        void* addr2 = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
161        printf("%p (%s)\n", addr2, addr2==(void*)-1 ? "failed" : "OK"); fflush(stdout);
162
163        printf("touching %p...\n", addr2); fflush(stdout);
164        memset(addr2, 0xAA, size);
165
166        printf("unmap %p ...\n", addr2); fflush(stdout);
167        munmap(addr2, size);
168
169        printf("touching %p...\n", addr1); fflush(stdout);
170        memset(addr1, 0x55, size);
171
172        printf("unmap %p ...\n", addr1); fflush(stdout);
173        munmap(addr1, size);
174    }
175
176    printf("Done\n"); fflush(stdout);
177    return 0;
178}
179
180int crash_test(int argc, char** argv)
181{
182    printf("about to crash...\n");
183    asm volatile(
184        "mov r0,  #0 \n"
185        "mov r1,  #1 \n"
186        "mov r2,  #2 \n"
187        "mov r3,  #3 \n"
188        "ldr r12, [r0] \n"
189    );
190
191    return 0;
192}
193
194int stack_smasher_test(int argc, char** argv)
195{
196    int dummy = 0;
197    printf("corrupting our stack...\n");
198    *(volatile long long*)&dummy = 0;
199    return 0;
200}
201
202// --------------------------------------------------------------------
203
204extern "C" void thumb_function_1(int*p);
205extern "C" void thumb_function_2(int*p);
206extern "C" void arm_function_3(int*p);
207extern "C" void arm_function_2(int*p);
208extern "C" void arm_function_1(int*p);
209
210void arm_function_3(int*p) {
211    int a = 0;
212    thumb_function_2(&a);
213}
214
215void arm_function_2(int*p) {
216    int a = 0;
217    thumb_function_1(&a);
218}
219
220void arm_function_1(int*p) {
221    int a = 0;
222    arm_function_2(&a);
223}
224
225int crawl_test(int argc, char** argv)
226{
227    int a = 0;
228    arm_function_1(&a);
229    return 0;
230}
231
232