tools/vm/page_owner_sort.c: sort by stacktrace before culling

[uclinux-h8/linux.git] / tools / vm / page_owner_sort.c

diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
index 9ebb84a..5582d84 100644 (file)
--- a/tools/vm/page_owner_sort.c
+++ b/tools/vm/page_owner_sort.c
@@ -23,6 +23,7 @@
 
 struct block_list {
        char *txt;
+       char *stacktrace;
        int len;
        int num;
        int page_num;
@@ -51,11 +52,11 @@ int read_block(char *buf, int buf_size, FILE *fin)
        return -1; /* EOF or no space left in buf. */
 }
 
-static int compare_txt(const void *p1, const void *p2)
+static int compare_stacktrace(const void *p1, const void *p2)
 {
        const struct block_list *l1 = p1, *l2 = p2;
 
-       return strcmp(l1->txt, l2->txt);
+       return strcmp(l1->stacktrace, l2->stacktrace);
 }
 
 static int compare_num(const void *p1, const void *p2)
@@ -121,6 +122,7 @@ static void add_list(char *buf, int len)
        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_size++;
        if (list_size % 1000 == 0) {
                printf("loaded %d\r", list_size);
@@ -199,7 +201,7 @@ int main(int argc, char **argv)
 
        printf("sorting ....\n");
 
-       qsort(list, list_size, sizeof(list[0]), compare_txt);
+       qsort(list, list_size, sizeof(list[0]), compare_stacktrace);
 
        list2 = malloc(sizeof(*list) * list_size);
        if (!list2) {
@@ -211,7 +213,7 @@ int main(int argc, char **argv)
 
        for (i = count = 0; i < list_size; i++) {
                if (count == 0 ||
-                   strcmp(list2[count-1].txt, list[i].txt) != 0) {
+                   strcmp(list2[count-1].stacktrace, list[i].stacktrace) != 0) {
                        list2[count++] = list[i];
                } else {
                        list2[count-1].num += list[i].num;