* Example use:
* cat /sys/kernel/debug/page_owner > page_owner_full.txt
* ./page_owner_sort page_owner_full.txt sorted_page_owner.txt
+ * Or sort by total memory:
+ * ./page_owner_sort -m page_owner_full.txt sorted_page_owner.txt
*
* See Documentation/vm/page_owner.rst
*/
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
+#include <regex.h>
+#include <errno.h>
+#include <linux/types.h>
struct block_list {
char *txt;
+ char *stacktrace;
int len;
int num;
+ int page_num;
+ pid_t pid;
+ __u64 ts_nsec;
+ __u64 free_ts_nsec;
};
-
+static regex_t order_pattern;
+static regex_t pid_pattern;
+static regex_t ts_nsec_pattern;
+static regex_t free_ts_nsec_pattern;
static struct block_list *list;
static int list_size;
static int max_size;
-struct block_list *block_head;
-
int read_block(char *buf, int buf_size, FILE *fin)
{
char *curr = buf, *const buf_end = buf + buf_size;
return strcmp(l1->txt, l2->txt);
}
+static int compare_stacktrace(const void *p1, const void *p2)
+{
+ const struct block_list *l1 = p1, *l2 = p2;
+
+ return strcmp(l1->stacktrace, l2->stacktrace);
+}
+
static int compare_num(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
return l2->num - l1->num;
}
+static int compare_page_num(const void *p1, const void *p2)
+{
+ const struct block_list *l1 = p1, *l2 = p2;
+
+ return l2->page_num - l1->page_num;
+}
+
+static int compare_pid(const void *p1, const void *p2)
+{
+ const struct block_list *l1 = p1, *l2 = p2;
+
+ return l1->pid - l2->pid;
+}
+
+static int compare_ts(const void *p1, const void *p2)
+{
+ const struct block_list *l1 = p1, *l2 = p2;
+
+ return l1->ts_nsec < l2->ts_nsec ? -1 : 1;
+}
+
+static int compare_free_ts(const void *p1, const void *p2)
+{
+ const struct block_list *l1 = p1, *l2 = p2;
+
+ return l1->free_ts_nsec < l2->free_ts_nsec ? -1 : 1;
+}
+
+static int search_pattern(regex_t *pattern, char *pattern_str, char *buf)
+{
+ int err, val_len;
+ regmatch_t pmatch[2];
+
+ err = regexec(pattern, buf, 2, pmatch, REG_NOTBOL);
+ if (err != 0 || pmatch[1].rm_so == -1) {
+ printf("no matching pattern in %s\n", buf);
+ return -1;
+ }
+ val_len = pmatch[1].rm_eo - pmatch[1].rm_so;
+
+ memcpy(pattern_str, buf + pmatch[1].rm_so, val_len);
+
+ return 0;
+}
+
+static void check_regcomp(regex_t *pattern, const char *regex)
+{
+ int err;
+
+ err = regcomp(pattern, regex, REG_EXTENDED | REG_NEWLINE);
+ if (err != 0 || pattern->re_nsub != 1) {
+ printf("Invalid pattern %s code %d\n", regex, err);
+ exit(1);
+ }
+}
+
+# define FIELD_BUFF 25
+
+static int get_page_num(char *buf)
+{
+ int order_val;
+ char order_str[FIELD_BUFF] = {0};
+ char *endptr;
+
+ search_pattern(&order_pattern, order_str, buf);
+ errno = 0;
+ order_val = strtol(order_str, &endptr, 10);
+ if (order_val > 64 || errno != 0 || endptr == order_str || *endptr != '\0') {
+ printf("wrong order in follow buf:\n%s\n", buf);
+ return 0;
+ }
+
+ return 1 << order_val;
+}
+
+static pid_t get_pid(char *buf)
+{
+ pid_t pid;
+ char pid_str[FIELD_BUFF] = {0};
+ char *endptr;
+
+ search_pattern(&pid_pattern, pid_str, buf);
+ errno = 0;
+ pid = strtol(pid_str, &endptr, 10);
+ if (errno != 0 || endptr == pid_str || *endptr != '\0') {
+ printf("wrong/invalid pid in follow buf:\n%s\n", buf);
+ return -1;
+ }
+
+ return pid;
+
+}
+
+static __u64 get_ts_nsec(char *buf)
+{
+ __u64 ts_nsec;
+ char ts_nsec_str[FIELD_BUFF] = {0};
+ char *endptr;
+
+ search_pattern(&ts_nsec_pattern, ts_nsec_str, buf);
+ errno = 0;
+ ts_nsec = strtoull(ts_nsec_str, &endptr, 10);
+ if (errno != 0 || endptr == ts_nsec_str || *endptr != '\0') {
+ printf("wrong ts_nsec in follow buf:\n%s\n", buf);
+ return -1;
+ }
+
+ return ts_nsec;
+}
+
+static __u64 get_free_ts_nsec(char *buf)
+{
+ __u64 free_ts_nsec;
+ char free_ts_nsec_str[FIELD_BUFF] = {0};
+ char *endptr;
+
+ search_pattern(&free_ts_nsec_pattern, free_ts_nsec_str, buf);
+ errno = 0;
+ free_ts_nsec = strtoull(free_ts_nsec_str, &endptr, 10);
+ if (errno != 0 || endptr == free_ts_nsec_str || *endptr != '\0') {
+ printf("wrong free_ts_nsec in follow buf:\n%s\n", buf);
+ return -1;
+ }
+
+ return free_ts_nsec;
+}
+
static void add_list(char *buf, int len)
{
if (list_size != 0 &&
len == list[list_size-1].len &&
memcmp(buf, list[list_size-1].txt, len) == 0) {
list[list_size-1].num++;
+ list[list_size-1].page_num += get_page_num(buf);
return;
}
if (list_size == max_size) {
list[list_size].txt = malloc(len+1);
list[list_size].len = len;
list[list_size].num = 1;
+ list[list_size].page_num = get_page_num(buf);
memcpy(list[list_size].txt, buf, len);
list[list_size].txt[len] = 0;
+ list[list_size].stacktrace = strchr(list[list_size].txt, '\n') ?: "";
+ list[list_size].pid = get_pid(buf);
+ list[list_size].ts_nsec = get_ts_nsec(buf);
+ list[list_size].free_ts_nsec = get_free_ts_nsec(buf);
list_size++;
if (list_size % 1000 == 0) {
printf("loaded %d\r", list_size);
#define BUF_SIZE (128 * 1024)
+static void usage(void)
+{
+ printf("Usage: ./page_owner_sort [OPTIONS] <input> <output>\n"
+ "-m Sort by total memory.\n"
+ "-s Sort by the stack trace.\n"
+ "-t Sort by times (default).\n"
+ "-p Sort by pid.\n"
+ "-a Sort by memory allocate time.\n"
+ "-r Sort by memory release time.\n"
+ "-c Cull by comparing stacktrace instead of total block.\n"
+ "-f Filter out the information of blocks whose memory has not been released.\n"
+ );
+}
+
int main(int argc, char **argv)
{
+ int (*cmp)(const void *, const void *) = compare_num;
+ int cull_st = 0;
+ int filter = 0;
FILE *fin, *fout;
char *buf;
int ret, i, count;
struct block_list *list2;
struct stat st;
+ int opt;
- if (argc < 3) {
- printf("Usage: ./program <input> <output>\n");
- perror("open: ");
+ while ((opt = getopt(argc, argv, "acfmprst")) != -1)
+ switch (opt) {
+ case 'a':
+ cmp = compare_ts;
+ break;
+ case 'c':
+ cull_st = 1;
+ break;
+ case 'f':
+ filter = 1;
+ break;
+ case 'm':
+ cmp = compare_page_num;
+ break;
+ case 'p':
+ cmp = compare_pid;
+ break;
+ case 'r':
+ cmp = compare_free_ts;
+ break;
+ case 's':
+ cmp = compare_stacktrace;
+ break;
+ case 't':
+ cmp = compare_num;
+ break;
+ default:
+ usage();
+ exit(1);
+ }
+
+ if (optind >= (argc - 1)) {
+ usage();
exit(1);
}
- fin = fopen(argv[1], "r");
- fout = fopen(argv[2], "w");
+ fin = fopen(argv[optind], "r");
+ fout = fopen(argv[optind + 1], "w");
if (!fin || !fout) {
- printf("Usage: ./program <input> <output>\n");
+ usage();
perror("open: ");
exit(1);
}
+ check_regcomp(&order_pattern, "order\\s*([0-9]*),");
+ check_regcomp(&pid_pattern, "pid\\s*([0-9]*),");
+ check_regcomp(&ts_nsec_pattern, "ts\\s*([0-9]*)\\s*ns,");
+ check_regcomp(&free_ts_nsec_pattern, "free_ts\\s*([0-9]*)\\s*ns");
fstat(fileno(fin), &st);
max_size = st.st_size / 100; /* hack ... */
printf("sorting ....\n");
- qsort(list, list_size, sizeof(list[0]), compare_txt);
+ if (cull_st == 1)
+ qsort(list, list_size, sizeof(list[0]), compare_stacktrace);
+ else
+ qsort(list, list_size, sizeof(list[0]), compare_txt);
list2 = malloc(sizeof(*list) * list_size);
if (!list2) {
printf("culling\n");
+ long offset = cull_st ? &list[0].stacktrace - &list[0].txt : 0;
+
for (i = count = 0; i < list_size; i++) {
if (count == 0 ||
- strcmp(list2[count-1].txt, list[i].txt) != 0) {
+ strcmp(*(&list2[count-1].txt+offset), *(&list[i].txt+offset)) != 0) {
list2[count++] = list[i];
} else {
list2[count-1].num += list[i].num;
+ list2[count-1].page_num += list[i].page_num;
}
}
- qsort(list2, count, sizeof(list[0]), compare_num);
-
- for (i = 0; i < count; i++)
- fprintf(fout, "%d times:\n%s\n", list2[i].num, list2[i].txt);
+ qsort(list2, count, sizeof(list[0]), cmp);
+ for (i = 0; i < count; i++) {
+ if (filter == 1 && list2[i].free_ts_nsec != 0)
+ continue;
+ fprintf(fout, "%d times, %d pages:\n%s\n",
+ list2[i].num, list2[i].page_num, list2[i].txt);
+ }
+ regfree(&order_pattern);
+ regfree(&pid_pattern);
+ regfree(&ts_nsec_pattern);
+ regfree(&free_ts_nsec_pattern);
return 0;
}
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