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memory_test
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update 

Signed-off-by: Wenchao Hao <haowenchao22@gmail.com>
This commit is contained in:
Wenchao Hao 2024-11-19 19:47:41 +08:00
parent a3ad058a2f
commit 36db457bf7
2 changed files with 117 additions and 38 deletions
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32
bak.c
View File

@ -27,27 +27,25 @@ void main()
exit(-1);
}
for (i = 0; i < 100000; i++) {
madvise(p, SIZE, MADV_HUGEPAGE);
memset(p, 0x11, SIZE); /* write to get mem */
madvise(p, SIZE, MADV_HUGEPAGE);
memset(p, 0x11, SIZE); /* write to get mem */
gettimeofday(&tv_b, NULL);
madvise(p, SIZE, MADV_PAGEOUT);
gettimeofday(&tv_e, NULL);
printf("swp out bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
pid = fork();
if (pid) {
//scanf("%c", &c);
gettimeofday(&tv_b, NULL);
madvise(p, SIZE, MADV_PAGEOUT);
memset(p, 0x33, SIZE); /* write to get mem */
gettimeofday(&tv_e, NULL);
printf("swp out bandwidth: %ld bytes/ms\n",
printf("swp in bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
//pid = fork();
//if (pid) {
//scanf("%c", &c);
gettimeofday(&tv_b, NULL);
memset(p, 0x33, SIZE); /* write to get mem */
gettimeofday(&tv_e, NULL);
printf("swp in bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
//}
}
while(1) {

123
madvise.c
View File

@ -7,51 +7,132 @@
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <openssl/md5.h>
#define SIZE 19*1024*1024
#define PAGE_SIZE 4096 // 4KB
#define CHUNK_SIZE 8 * 1024 // 8KB
void compute_md5(const unsigned char *data, size_t length, unsigned char *md5_hash) {
MD5_CTX md5_ctx;
MD5_Init(&md5_ctx);
MD5_Update(&md5_ctx, data, length);
MD5_Final(md5_hash, &md5_ctx);
}
void print_md5(unsigned char *md5_hash) {
for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
printf("%02x", md5_hash[i]);
}
printf("\n");
}
unsigned long long tv_to_ms(struct timeval tv)
{
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
void main()
int main()
{
char c;
pid_t pid;
int i;
int j = 0;
struct timeval tv_b, tv_e;;
#define SIZE 100*1024*1024
unsigned char md5_hash[MD5_DIGEST_LENGTH];
unsigned long *p = mmap(NULL, SIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (!p) {
perror("fail to get memory");
exit(-1);
}
printf("0x%lx\n", p);
madvise(p, SIZE, MADV_HUGEPAGE);
for (j = 0; j < SIZE / 8; j+=128)
for (j = 0; j < SIZE / 8; j += 8)
*(p + j) = j;
for (i = 0; i < 3; i++) {
gettimeofday(&tv_b, NULL);
madvise(p, SIZE, MADV_PAGEOUT);
gettimeofday(&tv_e, NULL);
for (size_t offset = PAGE_SIZE; offset < SIZE; offset += CHUNK_SIZE) {
char *str = (char *)p + offset;
printf("swp out bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
gettimeofday(&tv_b, NULL);
for (j = 0; j < SIZE / 8; j+=128)
*(p + j) = j;
gettimeofday(&tv_e, NULL);
printf("swp in bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
sprintf(str, "child");
}
//madvise(p, SIZE, MADV_PAGEOUT);
for (size_t offset = PAGE_SIZE; offset < SIZE; offset += CHUNK_SIZE) {
compute_md5((unsigned char *)p + offset, PAGE_SIZE, md5_hash);
printf("MD5 of the buffer: ");
print_md5(md5_hash);
}
//while(1) {
// sleep(100);
//}
gettimeofday(&tv_b, NULL);
madvise(p, SIZE, MADV_PAGEOUT);
gettimeofday(&tv_e, NULL);
printf("swp out bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
pid = fork();
if (pid == 0) {
printf("child: freeing some swap\n");
for (size_t offset = 0; offset < SIZE; offset += CHUNK_SIZE) {
if (madvise((void *)((char *)p + offset), PAGE_SIZE, MADV_DONTNEED) == -1) {
perror("madvise failed");
return -1;
}
}
printf("child: sleep\n");
sleep(5);
printf("child: reading swaped data\n");
for (size_t offset = PAGE_SIZE; offset < SIZE; offset += CHUNK_SIZE) {
char *str = (char *)p + offset;
if (strcmp(str, "child"))
printf("%s\n", str);
}
printf("child: read done\n");
for (size_t offset = PAGE_SIZE; offset < SIZE; offset += CHUNK_SIZE) {
compute_md5((unsigned char *)p + offset, PAGE_SIZE, md5_hash);
printf("MD5 of the buffer: ");
print_md5(md5_hash);
}
#if 2
} else {
printf("parent: sleeping\n");
sleep(1);
printf("parent: unmapping origin memory region\n");
munmap(p, SIZE);
printf("parent: alloc new memory region\n");
p = mmap(NULL, 9 * 1024 * 1024, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
for (j = 0; j < 1024 * 1024; j+=8)
*(p + j) = j + 10;
for (size_t offset = 0; offset < 8 * 1024 * 1024; offset += CHUNK_SIZE) {
char *str = (char *)p + offset + PAGE_SIZE;
sprintf(str, "parent");
}
madvise(p, 9 * 1024 * 1024, MADV_PAGEOUT);
#endif
}
while(1) {
sleep(100);
}
return 0;
}