#include <limits.h>
#include <stdlib.h>
#include <time.h>
+#include <sys/stat.h>
+#include <linux/mman.h>
#include "linux/kernel.h"
#include "test_util.h"
puts(", skipping test");
}
-const struct vm_mem_backing_src_alias backing_src_aliases[] = {
- {"anonymous", VM_MEM_SRC_ANONYMOUS,},
- {"anonymous_thp", VM_MEM_SRC_ANONYMOUS_THP,},
- {"anonymous_hugetlb", VM_MEM_SRC_ANONYMOUS_HUGETLB,},
-};
+bool thp_configured(void)
+{
+ int ret;
+ struct stat statbuf;
+
+ ret = stat("/sys/kernel/mm/transparent_hugepage", &statbuf);
+ TEST_ASSERT(ret == 0 || (ret == -1 && errno == ENOENT),
+ "Error in stating /sys/kernel/mm/transparent_hugepage");
+
+ return ret == 0;
+}
+
+size_t get_trans_hugepagesz(void)
+{
+ size_t size;
+ FILE *f;
+
+ TEST_ASSERT(thp_configured(), "THP is not configured in host kernel");
+
+ f = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r");
+ TEST_ASSERT(f != NULL, "Error in opening transparent_hugepage/hpage_pmd_size");
+
+ fscanf(f, "%ld", &size);
+ fclose(f);
+
+ return size;
+}
+
+size_t get_def_hugetlb_pagesz(void)
+{
+ char buf[64];
+ const char *tag = "Hugepagesize:";
+ FILE *f;
+
+ f = fopen("/proc/meminfo", "r");
+ TEST_ASSERT(f != NULL, "Error in opening /proc/meminfo");
+
+ while (fgets(buf, sizeof(buf), f) != NULL) {
+ if (strstr(buf, tag) == buf) {
+ fclose(f);
+ return strtoull(buf + strlen(tag), NULL, 10) << 10;
+ }
+ }
+
+ if (feof(f))
+ TEST_FAIL("HUGETLB is not configured in host kernel");
+ else
+ TEST_FAIL("Error in reading /proc/meminfo");
+
+ fclose(f);
+ return 0;
+}
+
+const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i)
+{
+ static const int anon_flags = MAP_PRIVATE | MAP_ANONYMOUS;
+ static const int anon_huge_flags = anon_flags | MAP_HUGETLB;
+
+ static const struct vm_mem_backing_src_alias aliases[] = {
+ [VM_MEM_SRC_ANONYMOUS] = {
+ .name = "anonymous",
+ .flag = anon_flags,
+ },
+ [VM_MEM_SRC_ANONYMOUS_THP] = {
+ .name = "anonymous_thp",
+ .flag = anon_flags,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB] = {
+ .name = "anonymous_hugetlb",
+ .flag = anon_huge_flags,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_16KB] = {
+ .name = "anonymous_hugetlb_16kb",
+ .flag = anon_huge_flags | MAP_HUGE_16KB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_64KB] = {
+ .name = "anonymous_hugetlb_64kb",
+ .flag = anon_huge_flags | MAP_HUGE_64KB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_512KB] = {
+ .name = "anonymous_hugetlb_512kb",
+ .flag = anon_huge_flags | MAP_HUGE_512KB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_1MB] = {
+ .name = "anonymous_hugetlb_1mb",
+ .flag = anon_huge_flags | MAP_HUGE_1MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_2MB] = {
+ .name = "anonymous_hugetlb_2mb",
+ .flag = anon_huge_flags | MAP_HUGE_2MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_8MB] = {
+ .name = "anonymous_hugetlb_8mb",
+ .flag = anon_huge_flags | MAP_HUGE_8MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_16MB] = {
+ .name = "anonymous_hugetlb_16mb",
+ .flag = anon_huge_flags | MAP_HUGE_16MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_32MB] = {
+ .name = "anonymous_hugetlb_32mb",
+ .flag = anon_huge_flags | MAP_HUGE_32MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_256MB] = {
+ .name = "anonymous_hugetlb_256mb",
+ .flag = anon_huge_flags | MAP_HUGE_256MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_512MB] = {
+ .name = "anonymous_hugetlb_512mb",
+ .flag = anon_huge_flags | MAP_HUGE_512MB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_1GB] = {
+ .name = "anonymous_hugetlb_1gb",
+ .flag = anon_huge_flags | MAP_HUGE_1GB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_2GB] = {
+ .name = "anonymous_hugetlb_2gb",
+ .flag = anon_huge_flags | MAP_HUGE_2GB,
+ },
+ [VM_MEM_SRC_ANONYMOUS_HUGETLB_16GB] = {
+ .name = "anonymous_hugetlb_16gb",
+ .flag = anon_huge_flags | MAP_HUGE_16GB,
+ },
+ [VM_MEM_SRC_SHMEM] = {
+ .name = "shmem",
+ .flag = MAP_SHARED,
+ },
+ };
+ _Static_assert(ARRAY_SIZE(aliases) == NUM_SRC_TYPES,
+ "Missing new backing src types?");
+
+ TEST_ASSERT(i < NUM_SRC_TYPES, "Backing src type ID %d too big", i);
+
+ return &aliases[i];
+}
+
+#define MAP_HUGE_PAGE_SIZE(x) (1ULL << ((x >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK))
+
+size_t get_backing_src_pagesz(uint32_t i)
+{
+ uint32_t flag = vm_mem_backing_src_alias(i)->flag;
+
+ switch (i) {
+ case VM_MEM_SRC_ANONYMOUS:
+ case VM_MEM_SRC_SHMEM:
+ return getpagesize();
+ case VM_MEM_SRC_ANONYMOUS_THP:
+ return get_trans_hugepagesz();
+ case VM_MEM_SRC_ANONYMOUS_HUGETLB:
+ return get_def_hugetlb_pagesz();
+ default:
+ return MAP_HUGE_PAGE_SIZE(flag);
+ }
+}
void backing_src_help(void)
{
int i;
printf("Available backing src types:\n");
- for (i = 0; i < ARRAY_SIZE(backing_src_aliases); i++)
- printf("\t%s\n", backing_src_aliases[i].name);
+ for (i = 0; i < NUM_SRC_TYPES; i++)
+ printf("\t%s\n", vm_mem_backing_src_alias(i)->name);
}
enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name)
{
int i;
- for (i = 0; i < ARRAY_SIZE(backing_src_aliases); i++)
- if (!strcmp(type_name, backing_src_aliases[i].name))
- return backing_src_aliases[i].type;
+ for (i = 0; i < NUM_SRC_TYPES; i++)
+ if (!strcmp(type_name, vm_mem_backing_src_alias(i)->name))
+ return i;
backing_src_help();
TEST_FAIL("Unknown backing src type: %s", type_name);
projects / linux-2.6-microblaze.git / blobdiff