diff options
Diffstat (limited to 'tools/vm/page_owner_sort.c')
| -rw-r--r-- | tools/vm/page_owner_sort.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c deleted file mode 100644 index d3a8755c039c..000000000000 --- a/tools/vm/page_owner_sort.c +++ /dev/null @@ -1,152 +0,0 @@ -// 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; -} |
