mirror of
https://github.com/torvalds/linux.git
synced 2024-12-11 13:41:55 +00:00
aff876dcf4
The example in comment does not useable because the output binary is named "page_owner_sort", not "sort". Also add a reference to Documentation/vm/page_owner.rst Link: http://lkml.kernel.org/r/1546515361-8317-1-git-send-email-miles.chen@mediatek.com Signed-off-by: Miles Chen <miles.chen@mediatek.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
153 lines
3.0 KiB
C
153 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* User-space helper to sort the output of /sys/kernel/debug/page_owner
|
|
*
|
|
* Example use:
|
|
* cat /sys/kernel/debug/page_owner > page_owner_full.txt
|
|
* grep -v ^PFN page_owner_full.txt > page_owner.txt
|
|
* ./page_owner_sort page_owner.txt sorted_page_owner.txt
|
|
*
|
|
* See Documentation/vm/page_owner.rst
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
|
|
struct block_list {
|
|
char *txt;
|
|
int len;
|
|
int num;
|
|
};
|
|
|
|
|
|
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;
|
|
|
|
while (buf_end - curr > 1 && fgets(curr, buf_end - curr, fin)) {
|
|
if (*curr == '\n') /* empty line */
|
|
return curr - buf;
|
|
curr += strlen(curr);
|
|
}
|
|
|
|
return -1; /* EOF or no space left in buf. */
|
|
}
|
|
|
|
static int compare_txt(const void *p1, const void *p2)
|
|
{
|
|
const struct block_list *l1 = p1, *l2 = p2;
|
|
|
|
return strcmp(l1->txt, l2->txt);
|
|
}
|
|
|
|
static int compare_num(const void *p1, const void *p2)
|
|
{
|
|
const struct block_list *l1 = p1, *l2 = p2;
|
|
|
|
return l2->num - l1->num;
|
|
}
|
|
|
|
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++;
|
|
return;
|
|
}
|
|
if (list_size == max_size) {
|
|
printf("max_size too small??\n");
|
|
exit(1);
|
|
}
|
|
list[list_size].txt = malloc(len+1);
|
|
list[list_size].len = len;
|
|
list[list_size].num = 1;
|
|
memcpy(list[list_size].txt, buf, len);
|
|
list[list_size].txt[len] = 0;
|
|
list_size++;
|
|
if (list_size % 1000 == 0) {
|
|
printf("loaded %d\r", list_size);
|
|
fflush(stdout);
|
|
}
|
|
}
|
|
|
|
#define BUF_SIZE (128 * 1024)
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
FILE *fin, *fout;
|
|
char *buf;
|
|
int ret, i, count;
|
|
struct block_list *list2;
|
|
struct stat st;
|
|
|
|
if (argc < 3) {
|
|
printf("Usage: ./program <input> <output>\n");
|
|
perror("open: ");
|
|
exit(1);
|
|
}
|
|
|
|
fin = fopen(argv[1], "r");
|
|
fout = fopen(argv[2], "w");
|
|
if (!fin || !fout) {
|
|
printf("Usage: ./program <input> <output>\n");
|
|
perror("open: ");
|
|
exit(1);
|
|
}
|
|
|
|
fstat(fileno(fin), &st);
|
|
max_size = st.st_size / 100; /* hack ... */
|
|
|
|
list = malloc(max_size * sizeof(*list));
|
|
buf = malloc(BUF_SIZE);
|
|
if (!list || !buf) {
|
|
printf("Out of memory\n");
|
|
exit(1);
|
|
}
|
|
|
|
for ( ; ; ) {
|
|
ret = read_block(buf, BUF_SIZE, fin);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
add_list(buf, ret);
|
|
}
|
|
|
|
printf("loaded %d\n", list_size);
|
|
|
|
printf("sorting ....\n");
|
|
|
|
qsort(list, list_size, sizeof(list[0]), compare_txt);
|
|
|
|
list2 = malloc(sizeof(*list) * list_size);
|
|
|
|
printf("culling\n");
|
|
|
|
for (i = count = 0; i < list_size; i++) {
|
|
if (count == 0 ||
|
|
strcmp(list2[count-1].txt, list[i].txt) != 0) {
|
|
list2[count++] = list[i];
|
|
} else {
|
|
list2[count-1].num += list[i].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);
|
|
|
|
return 0;
|
|
}
|