9f7425c152
Tests arm64 specific, contiguous bit based large pages as well. Change-Id: I09edad8cfde6c23a259f1f32cfc97974d9cb63c3
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include "../util.h"
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#define PAGE_SHIFT_2M 21
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#define PAGE_SIZE_2M (1UL << PAGE_SHIFT_2M)
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char fn_2M[] = "/mnt/hugetlbfs-2M/tmp";
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#define PAGE_SHIFT_512M 29
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#define PAGE_SIZE_512M (1UL << PAGE_SHIFT_512M)
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char fn_512M[] = "/mnt/hugetlbfs-512M/tmp";
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int trial_num;
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int mmap_hugetlbfs(char *fn, size_t page_size)
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{
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int fd;
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char *addr_mmap;
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fd = open(fn, O_CREAT | O_RDWR, 0755);
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NG(fd != -1, "open failed, fn: %s\n", fn);
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addr_mmap = mmap(0, page_size,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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fd, 0);
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NG(addr_mmap != (void *)-1, "mmap failed\n");
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addr_mmap[0] = 'z';
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NG(__atomic_load_n(addr_mmap, __ATOMIC_SEQ_CST) == 'z',
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"memory access failed\n");
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printf("large page request, trial#: %03d, addr: %016lx, size: %ld\n",
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trial_num++, (unsigned long)addr_mmap, page_size);
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munmap(addr_mmap, page_size);
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close(fd);
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unlink(fn);
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return 0;
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fn_fail:
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return 1;
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}
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int main(int argc, char **argv)
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{
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int ret;
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ret = mmap_hugetlbfs(fn_2M, PAGE_SIZE_2M);
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NG(ret == 0, "mmap_hugetlbfs failed, fn: %s", fn_2M);
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ret = mmap_hugetlbfs(fn_512M, PAGE_SIZE_512M);
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NG(ret == 0, "mmap_hugetlbfs failed, fn: %s", fn_512M);
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return 0;
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fn_fail:
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return 1;
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}
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