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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 2024-11-18 21:33:03 +08:00
parent 656226aead
commit a3ad058a2f
2 changed files with 85 additions and 8 deletions
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56
bak.c Normal file
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@ -0,0 +1,56 @@
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
unsigned long long tv_to_ms(struct timeval tv)
{
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
void main()
{
char c;
pid_t pid;
int i;
struct timeval tv_b, tv_e;;
#define SIZE 400*1024*1024
void *p = mmap(NULL, SIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (!p) {
perror("fail to get memory");
exit(-1);
}
for (i = 0; i < 100000; i++) {
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);
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) {
sleep(100);
}
}

37
madvise.c
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@ -15,9 +15,13 @@ unsigned long long tv_to_ms(struct timeval tv)
void main() void main()
{ {
char c;
pid_t pid;
int i;
int j = 0;
struct timeval tv_b, tv_e;; struct timeval tv_b, tv_e;;
#define SIZE 400*1024*1024 #define SIZE 100*1024*1024
void *p = mmap(NULL, SIZE, PROT_READ | PROT_WRITE, unsigned long *p = mmap(NULL, SIZE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (!p) { if (!p) {
perror("fail to get memory"); perror("fail to get memory");
@ -25,12 +29,29 @@ void main()
} }
madvise(p, SIZE, MADV_HUGEPAGE); madvise(p, SIZE, MADV_HUGEPAGE);
memset(p, 0x11, SIZE); /* write to get mem */
gettimeofday(&tv_b, NULL); for (j = 0; j < SIZE / 8; j+=128)
madvise(p, SIZE, MADV_PAGEOUT); *(p + j) = j;
gettimeofday(&tv_e, NULL);
printf("swp out bandwidth: %ld bytes/ms\n", for (i = 0; i < 3; i++) {
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b))); 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)));
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)));
}
//madvise(p, SIZE, MADV_PAGEOUT);
//while(1) {
// sleep(100);
//}
} }