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selftests/mm: split_huge_page_test: conform test to TAP format output

Browse source 
Conform the layout, informational and status messages to TAP.  No
functional change is intended other than the layout of output messages.

Link: https://lkml.kernel.org/r/20240202113119.2047740-9-usama.anjum@collabora.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Muhammad Usama Anjum 2024-02-02 16:31:15 +05:00 committed by Andrew Morton
parent a0d4705785
commit 735887041a
1 changed files with 70 additions and 93 deletions
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163
tools/testing/selftests/mm/split_huge_page_test.c
View file

@ -17,6 +17,7 @@
#include <malloc.h>
#include <stdbool.h>
#include "vm_util.h"
#include "../kselftest.h"
uint64_t pagesize;
unsigned int pageshift;
@ -50,21 +51,19 @@ int is_backed_by_thp(char *vaddr, int pagemap_file, int kpageflags_file)
return 0;
}
static int write_file(const char *path, const char *buf, size_t buflen)
static void write_file(const char *path, const char *buf, size_t buflen)
{
int fd;
ssize_t numwritten;
fd = open(path, O_WRONLY);
if (fd == -1)
return 0;
ksft_exit_fail_msg("%s open failed: %s\n", path, strerror(errno));
numwritten = write(fd, buf, buflen - 1);
close(fd);
if (numwritten < 1)
return 0;
return (unsigned int) numwritten;
ksft_exit_fail_msg("Write failed\n");
}
static void write_debugfs(const char *fmt, ...)
@ -77,15 +76,10 @@ static void write_debugfs(const char *fmt, ...)
ret = vsnprintf(input, INPUT_MAX, fmt, argp);
va_end(argp);
if (ret >= INPUT_MAX) {
printf("%s: Debugfs input is too long\n", __func__);
exit(EXIT_FAILURE);
}
if (ret >= INPUT_MAX)
ksft_exit_fail_msg("%s: Debugfs input is too long\n", __func__);
if (!write_file(SPLIT_DEBUGFS, input, ret + 1)) {
perror(SPLIT_DEBUGFS);
exit(EXIT_FAILURE);
}
write_file(SPLIT_DEBUGFS, input, ret + 1);
}
void split_pmd_thp(void)
@ -95,39 +89,30 @@ void split_pmd_thp(void)
size_t i;
one_page = memalign(pmd_pagesize, len);
if (!one_page) {
printf("Fail to allocate memory\n");
exit(EXIT_FAILURE);
}
if (!one_page)
ksft_exit_fail_msg("Fail to allocate memory: %s\n", strerror(errno));
madvise(one_page, len, MADV_HUGEPAGE);
for (i = 0; i < len; i++)
one_page[i] = (char)i;
if (!check_huge_anon(one_page, 4, pmd_pagesize)) {
printf("No THP is allocated\n");
exit(EXIT_FAILURE);
}
if (!check_huge_anon(one_page, 4, pmd_pagesize))
ksft_exit_fail_msg("No THP is allocated\n");
/* split all THPs */
write_debugfs(PID_FMT, getpid(), (uint64_t)one_page,
(uint64_t)one_page + len);
for (i = 0; i < len; i++)
if (one_page[i] != (char)i) {
printf("%ld byte corrupted\n", i);
exit(EXIT_FAILURE);
}
if (one_page[i] != (char)i)
ksft_exit_fail_msg("%ld byte corrupted\n", i);
if (!check_huge_anon(one_page, 0, pmd_pagesize)) {
printf("Still AnonHugePages not split\n");
exit(EXIT_FAILURE);
}
if (!check_huge_anon(one_page, 0, pmd_pagesize))
ksft_exit_fail_msg("Still AnonHugePages not split\n");
printf("Split huge pages successful\n");
ksft_test_result_pass("Split huge pages successful\n");
free(one_page);
}
@ -143,36 +128,29 @@ void split_pte_mapped_thp(void)
int pagemap_fd;
int kpageflags_fd;
if (snprintf(pagemap_proc, 255, pagemap_template, getpid()) < 0) {
perror("get pagemap proc error");
exit(EXIT_FAILURE);
}
pagemap_fd = open(pagemap_proc, O_RDONLY);
if (snprintf(pagemap_proc, 255, pagemap_template, getpid()) < 0)
ksft_exit_fail_msg("get pagemap proc error: %s\n", strerror(errno));
if (pagemap_fd == -1) {
perror("read pagemap:");
exit(EXIT_FAILURE);
}
pagemap_fd = open(pagemap_proc, O_RDONLY);
if (pagemap_fd == -1)
ksft_exit_fail_msg("read pagemap: %s\n", strerror(errno));
kpageflags_fd = open(kpageflags_proc, O_RDONLY);
if (kpageflags_fd == -1) {
perror("read kpageflags:");
exit(EXIT_FAILURE);
}
if (kpageflags_fd == -1)
ksft_exit_fail_msg("read kpageflags: %s\n", strerror(errno));
one_page = mmap((void *)(1UL << 30), len, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (one_page == MAP_FAILED)
ksft_exit_fail_msg("Fail to allocate memory: %s\n", strerror(errno));
madvise(one_page, len, MADV_HUGEPAGE);
for (i = 0; i < len; i++)
one_page[i] = (char)i;
if (!check_huge_anon(one_page, 4, pmd_pagesize)) {
printf("No THP is allocated\n");
exit(EXIT_FAILURE);
}
if (!check_huge_anon(one_page, 4, pmd_pagesize))
ksft_exit_fail_msg("No THP is allocated\n");
/* remap the first pagesize of first THP */
pte_mapped = mremap(one_page, pagesize, pagesize, MREMAP_MAYMOVE);
@ -183,10 +161,8 @@ void split_pte_mapped_thp(void)
pagesize, pagesize,
MREMAP_MAYMOVE|MREMAP_FIXED,
pte_mapped + pagesize * i);
if (pte_mapped2 == (char *)-1) {
perror("mremap failed");
exit(EXIT_FAILURE);
}
if (pte_mapped2 == MAP_FAILED)
ksft_exit_fail_msg("mremap failed: %s\n", strerror(errno));
}
/* smap does not show THPs after mremap, use kpageflags instead */
@ -196,10 +172,8 @@ void split_pte_mapped_thp(void)
is_backed_by_thp(&pte_mapped[i], pagemap_fd, kpageflags_fd))
thp_size++;
if (thp_size != 4) {
printf("Some THPs are missing during mremap\n");
exit(EXIT_FAILURE);
}
if (thp_size != 4)
ksft_exit_fail_msg("Some THPs are missing during mremap\n");
/* split all remapped THPs */
write_debugfs(PID_FMT, getpid(), (uint64_t)pte_mapped,
@ -208,21 +182,18 @@ void split_pte_mapped_thp(void)
/* smap does not show THPs after mremap, use kpageflags instead */
thp_size = 0;
for (i = 0; i < pagesize * 4; i++) {
if (pte_mapped[i] != (char)i) {
printf("%ld byte corrupted\n", i);
exit(EXIT_FAILURE);
}
if (pte_mapped[i] != (char)i)
ksft_exit_fail_msg("%ld byte corrupted\n", i);
if (i % pagesize == 0 &&
is_backed_by_thp(&pte_mapped[i], pagemap_fd, kpageflags_fd))
thp_size++;
}
if (thp_size) {
printf("Still %ld THPs not split\n", thp_size);
exit(EXIT_FAILURE);
}
if (thp_size)
ksft_exit_fail_msg("Still %ld THPs not split\n", thp_size);
printf("Split PTE-mapped huge pages successful\n");
ksft_test_result_pass("Split PTE-mapped huge pages successful\n");
munmap(one_page, len);
close(pagemap_fd);
close(kpageflags_fd);
@ -238,24 +209,21 @@ void split_file_backed_thp(void)
char testfile[INPUT_MAX];
uint64_t pgoff_start = 0, pgoff_end = 1024;
printf("Please enable pr_debug in split_huge_pages_in_file() if you need more info.\n");
ksft_print_msg("Please enable pr_debug in split_huge_pages_in_file() for more info.\n");
status = mount("tmpfs", tmpfs_loc, "tmpfs", 0, "huge=always,size=4m");
if (status) {
printf("Unable to create a tmpfs for testing\n");
exit(EXIT_FAILURE);
}
if (status)
ksft_exit_fail_msg("Unable to create a tmpfs for testing\n");
status = snprintf(testfile, INPUT_MAX, "%s/thp_file", tmpfs_loc);
if (status >= INPUT_MAX) {
printf("Fail to create file-backed THP split testing file\n");
goto cleanup;
ksft_exit_fail_msg("Fail to create file-backed THP split testing file\n");
}
fd = open(testfile, O_CREAT|O_WRONLY);
if (fd == -1) {
perror("Cannot open testing file\n");
ksft_perror("Cannot open testing file");
goto cleanup;
}
@ -264,7 +232,7 @@ void split_file_backed_thp(void)
close(fd);
if (num_written < 1) {
printf("Fail to write data to testing file\n");
ksft_perror("Fail to write data to testing file");
goto cleanup;
}
@ -272,42 +240,51 @@ void split_file_backed_thp(void)
write_debugfs(PATH_FMT, testfile, pgoff_start, pgoff_end);
status = unlink(testfile);
if (status)
perror("Cannot remove testing file\n");
if (status) {
ksft_perror("Cannot remove testing file");
goto cleanup;
}
cleanup:
status = umount(tmpfs_loc);
if (status) {
printf("Unable to umount %s\n", tmpfs_loc);
exit(EXIT_FAILURE);
}
status = rmdir(tmpfs_loc);
if (status) {
perror("cannot remove tmp dir");
exit(EXIT_FAILURE);
rmdir(tmpfs_loc);
ksft_exit_fail_msg("Unable to umount %s\n", tmpfs_loc);
}
printf("file-backed THP split test done, please check dmesg for more information\n");
status = rmdir(tmpfs_loc);
if (status)
ksft_exit_fail_msg("cannot remove tmp dir: %s\n", strerror(errno));
ksft_print_msg("Please check dmesg for more information\n");
ksft_test_result_pass("File-backed THP split test done\n");
return;
cleanup:
umount(tmpfs_loc);
rmdir(tmpfs_loc);
ksft_exit_fail_msg("Error occurred\n");
}
int main(int argc, char **argv)
{
ksft_print_header();
if (geteuid() != 0) {
printf("Please run the benchmark as root\n");
exit(EXIT_FAILURE);
ksft_print_msg("Please run the benchmark as root\n");
ksft_finished();
}
ksft_set_plan(3);
pagesize = getpagesize();
pageshift = ffs(pagesize) - 1;
pmd_pagesize = read_pmd_pagesize();
if (!pmd_pagesize) {
printf("Reading PMD pagesize failed\n");
exit(EXIT_FAILURE);
}
if (!pmd_pagesize)
ksft_exit_fail_msg("Reading PMD pagesize failed\n");
split_pmd_thp();
split_pte_mapped_thp();
split_file_backed_thp();
return 0;
ksft_finished();
}