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test_swap: donot using random to fill memory region to avoid mismatch 

Signed-off-by: Wenchao Hao <haowenchao22@gmail.com>
This commit is contained in:
Wenchao Hao 2024-11-20 14:11:40 +08:00
parent 15b49dd069
commit 754870f548
1 changed files with 3 additions and 5 deletions
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8
test_swap.c
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@ -36,15 +36,14 @@ int main()
/* fill data */
for (i = 0; i < SIZE / 8; i += 8)
*(p + i) = (unsigned long)rand() << 32 | rand();
*(p + i) = 0xffff + i;
/* trigger pageout and get time of pageout */
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)));
printf("swp out bandwidth: %ld bytes/ms\n", SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
/* read to trigger swapin and */
gettimeofday(&tv_b, NULL);
@ -52,8 +51,7 @@ int main()
*(c + i) = i;
gettimeofday(&tv_e, NULL);
printf("swp in bandwidth: %ld bytes/ms\n",
SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
printf("swp in bandwidth: %ld bytes/ms\n", SIZE/(tv_to_ms(tv_e) - tv_to_ms(tv_b)));
pid = fork();