Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 872 insertions, 0 deletions

diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
new file mode 100644
index 000000000..58ebfe392
--- /dev/null
+++ b/tools/vm/page_owner_sort.c
@@ -0,0 +1,872 @@
+// 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
+ * ./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/mm/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>
+#include <regex.h>
+#include <errno.h>
+#include <linux/types.h>
+#include <getopt.h>
+
+#define bool int
+#define true 1
+#define false 0
+#define TASK_COMM_LEN 16
+
+struct block_list {
+	char *txt;
+	char *comm; // task command name
+	char *stacktrace;
+	__u64 ts_nsec;
+	__u64 free_ts_nsec;
+	int len;
+	int num;
+	int page_num;
+	pid_t pid;
+	pid_t tgid;
+	int allocator;
+};
+enum FILTER_BIT {
+	FILTER_UNRELEASE = 1<<1,
+	FILTER_PID = 1<<2,
+	FILTER_TGID = 1<<3,
+	FILTER_COMM = 1<<4
+};
+enum CULL_BIT {
+	CULL_UNRELEASE = 1<<1,
+	CULL_PID = 1<<2,
+	CULL_TGID = 1<<3,
+	CULL_COMM = 1<<4,
+	CULL_STACKTRACE = 1<<5,
+	CULL_ALLOCATOR = 1<<6
+};
+enum ALLOCATOR_BIT {
+	ALLOCATOR_CMA = 1<<1,
+	ALLOCATOR_SLAB = 1<<2,
+	ALLOCATOR_VMALLOC = 1<<3,
+	ALLOCATOR_OTHERS = 1<<4
+};
+enum ARG_TYPE {
+	ARG_TXT, ARG_COMM, ARG_STACKTRACE, ARG_ALLOC_TS, ARG_FREE_TS,
+	ARG_CULL_TIME, ARG_PAGE_NUM, ARG_PID, ARG_TGID, ARG_UNKNOWN, ARG_FREE,
+	ARG_ALLOCATOR
+};
+enum SORT_ORDER {
+	SORT_ASC = 1,
+	SORT_DESC = -1,
+};
+struct filter_condition {
+	pid_t *pids;
+	pid_t *tgids;
+	char **comms;
+	int pids_size;
+	int tgids_size;
+	int comms_size;
+};
+struct sort_condition {
+	int (**cmps)(const void *, const void *);
+	int *signs;
+	int size;
+};
+static struct filter_condition fc;
+static struct sort_condition sc;
+static regex_t order_pattern;
+static regex_t pid_pattern;
+static regex_t tgid_pattern;
+static regex_t comm_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;
+static int cull;
+static int filter;
+static bool debug_on;
+
+static void set_single_cmp(int (*cmp)(const void *, const void *), int sign);
+
+int read_block(char *buf, char *ext_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;
+		}
+		if (!strncmp(curr, "PFN", 3)) {
+			strcpy(ext_buf, curr);
+			continue;
+		}
+		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_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 l1->num - l2->num;
+}
+
+static int compare_page_num(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	return l1->page_num - l2->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_tgid(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	return l1->tgid - l2->tgid;
+}
+
+static int compare_allocator(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	return l1->allocator - l2->allocator;
+}
+
+static int compare_comm(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	return strcmp(l1->comm, l2->comm);
+}
+
+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 compare_release(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	if (!l1->free_ts_nsec && !l2->free_ts_nsec)
+		return 0;
+	if (l1->free_ts_nsec && l2->free_ts_nsec)
+		return 0;
+	return l1->free_ts_nsec ? 1 : -1;
+}
+
+static int compare_cull_condition(const void *p1, const void *p2)
+{
+	if (cull == 0)
+		return compare_txt(p1, p2);
+	if ((cull & CULL_STACKTRACE) && compare_stacktrace(p1, p2))
+		return compare_stacktrace(p1, p2);
+	if ((cull & CULL_PID) && compare_pid(p1, p2))
+		return compare_pid(p1, p2);
+	if ((cull & CULL_TGID) && compare_tgid(p1, p2))
+		return compare_tgid(p1, p2);
+	if ((cull & CULL_COMM) && compare_comm(p1, p2))
+		return compare_comm(p1, p2);
+	if ((cull & CULL_UNRELEASE) && compare_release(p1, p2))
+		return compare_release(p1, p2);
+	if ((cull & CULL_ALLOCATOR) && compare_allocator(p1, p2))
+		return compare_allocator(p1, p2);
+	return 0;
+}
+
+static int compare_sort_condition(const void *p1, const void *p2)
+{
+	int cmp = 0;
+
+	for (int i = 0; i < sc.size; ++i)
+		if (cmp == 0)
+			cmp = sc.signs[i] * sc.cmps[i](p1, p2);
+	return cmp;
+}
+
+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) {
+		if (debug_on)
+			fprintf(stderr, "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) {
+		fprintf(stderr, "Invalid pattern %s code %d\n", regex, err);
+		exit(1);
+	}
+}
+
+static char **explode(char sep, const char *str, int *size)
+{
+	int count = 0, len = strlen(str);
+	int lastindex = -1, j = 0;
+
+	for (int i = 0; i < len; i++)
+		if (str[i] == sep)
+			count++;
+	char **ret = calloc(++count, sizeof(char *));
+
+	for (int i = 0; i < len; i++) {
+		if (str[i] == sep) {
+			ret[j] = calloc(i - lastindex, sizeof(char));
+			memcpy(ret[j++], str + lastindex + 1, i - lastindex - 1);
+			lastindex = i;
+		}
+	}
+	if (lastindex <= len - 1) {
+		ret[j] = calloc(len - lastindex, sizeof(char));
+		memcpy(ret[j++], str + lastindex + 1, strlen(str) - 1 - lastindex);
+	}
+	*size = j;
+	return ret;
+}
+
+static void free_explode(char **arr, int size)
+{
+	for (int i = 0; i < size; i++)
+		free(arr[i]);
+	free(arr);
+}
+
+# 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') {
+		if (debug_on)
+			fprintf(stderr, "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') {
+		if (debug_on)
+			fprintf(stderr, "wrong/invalid pid in follow buf:\n%s\n", buf);
+		return -1;
+	}
+
+	return pid;
+
+}
+
+static pid_t get_tgid(char *buf)
+{
+	pid_t tgid;
+	char tgid_str[FIELD_BUFF] = {0};
+	char *endptr;
+
+	search_pattern(&tgid_pattern, tgid_str, buf);
+	errno = 0;
+	tgid = strtol(tgid_str, &endptr, 10);
+	if (errno != 0 || endptr == tgid_str || *endptr != '\0') {
+		if (debug_on)
+			fprintf(stderr, "wrong/invalid tgid in follow buf:\n%s\n", buf);
+		return -1;
+	}
+
+	return tgid;
+
+}
+
+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') {
+		if (debug_on)
+			fprintf(stderr, "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') {
+		if (debug_on)
+			fprintf(stderr, "wrong free_ts_nsec in follow buf:\n%s\n", buf);
+		return -1;
+	}
+
+	return free_ts_nsec;
+}
+
+static char *get_comm(char *buf)
+{
+	char *comm_str = malloc(TASK_COMM_LEN);
+
+	memset(comm_str, 0, TASK_COMM_LEN);
+
+	search_pattern(&comm_pattern, comm_str, buf);
+	errno = 0;
+	if (errno != 0) {
+		if (debug_on)
+			fprintf(stderr, "wrong comm in follow buf:\n%s\n", buf);
+		return NULL;
+	}
+
+	return comm_str;
+}
+
+static int get_arg_type(const char *arg)
+{
+	if (!strcmp(arg, "pid") || !strcmp(arg, "p"))
+		return ARG_PID;
+	else if (!strcmp(arg, "tgid") || !strcmp(arg, "tg"))
+		return ARG_TGID;
+	else if (!strcmp(arg, "name") || !strcmp(arg, "n"))
+		return  ARG_COMM;
+	else if (!strcmp(arg, "stacktrace") || !strcmp(arg, "st"))
+		return ARG_STACKTRACE;
+	else if (!strcmp(arg, "free") || !strcmp(arg, "f"))
+		return ARG_FREE;
+	else if (!strcmp(arg, "txt") || !strcmp(arg, "T"))
+		return ARG_TXT;
+	else if (!strcmp(arg, "free_ts") || !strcmp(arg, "ft"))
+		return ARG_FREE_TS;
+	else if (!strcmp(arg, "alloc_ts") || !strcmp(arg, "at"))
+		return ARG_ALLOC_TS;
+	else if (!strcmp(arg, "allocator") || !strcmp(arg, "ator"))
+		return ARG_ALLOCATOR;
+	else {
+		return ARG_UNKNOWN;
+	}
+}
+
+static int get_allocator(const char *buf, const char *migrate_info)
+{
+	char *tmp, *first_line, *second_line;
+	int allocator = 0;
+
+	if (strstr(migrate_info, "CMA"))
+		allocator |= ALLOCATOR_CMA;
+	if (strstr(migrate_info, "slab"))
+		allocator |= ALLOCATOR_SLAB;
+	tmp = strstr(buf, "__vmalloc_node_range");
+	if (tmp) {
+		second_line = tmp;
+		while (*tmp != '\n')
+			tmp--;
+		tmp--;
+		while (*tmp != '\n')
+			tmp--;
+		first_line = ++tmp;
+		tmp = strstr(tmp, "alloc_pages");
+		if (tmp && first_line <= tmp && tmp < second_line)
+			allocator |= ALLOCATOR_VMALLOC;
+	}
+	if (allocator == 0)
+		allocator = ALLOCATOR_OTHERS;
+	return allocator;
+}
+
+static bool match_num_list(int num, int *list, int list_size)
+{
+	for (int i = 0; i < list_size; ++i)
+		if (list[i] == num)
+			return true;
+	return false;
+}
+
+static bool match_str_list(const char *str, char **list, int list_size)
+{
+	for (int i = 0; i < list_size; ++i)
+		if (!strcmp(list[i], str))
+			return true;
+	return false;
+}
+
+static bool is_need(char *buf)
+{
+	__u64 ts_nsec, free_ts_nsec;
+
+	ts_nsec = get_ts_nsec(buf);
+	free_ts_nsec = get_free_ts_nsec(buf);
+
+	if ((filter & FILTER_UNRELEASE) && free_ts_nsec != 0 && ts_nsec < free_ts_nsec)
+		return false;
+	if ((filter & FILTER_PID) && !match_num_list(get_pid(buf), fc.pids, fc.pids_size))
+		return false;
+	if ((filter & FILTER_TGID) &&
+		!match_num_list(get_tgid(buf), fc.tgids, fc.tgids_size))
+		return false;
+
+	char *comm = get_comm(buf);
+
+	if ((filter & FILTER_COMM) &&
+	!match_str_list(comm, fc.comms, fc.comms_size)) {
+		free(comm);
+		return false;
+	}
+	free(comm);
+	return true;
+}
+
+static void add_list(char *buf, int len, char *ext_buf)
+{
+	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) {
+		fprintf(stderr, "max_size too small??\n");
+		exit(1);
+	}
+	if (!is_need(buf))
+		return;
+	list[list_size].pid = get_pid(buf);
+	list[list_size].tgid = get_tgid(buf);
+	list[list_size].comm = get_comm(buf);
+	list[list_size].txt = malloc(len+1);
+	if (!list[list_size].txt) {
+		fprintf(stderr, "Out of memory\n");
+		exit(1);
+	}
+	memcpy(list[list_size].txt, buf, len);
+	list[list_size].txt[len] = 0;
+	list[list_size].len = len;
+	list[list_size].num = 1;
+	list[list_size].page_num = get_page_num(buf);
+
+	list[list_size].stacktrace = strchr(list[list_size].txt, '\n') ?: "";
+	if (*list[list_size].stacktrace == '\n')
+		list[list_size].stacktrace++;
+	list[list_size].ts_nsec = get_ts_nsec(buf);
+	list[list_size].free_ts_nsec = get_free_ts_nsec(buf);
+	list[list_size].allocator = get_allocator(buf, ext_buf);
+	list_size++;
+	if (list_size % 1000 == 0) {
+		printf("loaded %d\r", list_size);
+		fflush(stdout);
+	}
+}
+
+static bool parse_cull_args(const char *arg_str)
+{
+	int size = 0;
+	char **args = explode(',', arg_str, &size);
+
+	for (int i = 0; i < size; ++i) {
+		int arg_type = get_arg_type(args[i]);
+
+		if (arg_type == ARG_PID)
+			cull |= CULL_PID;
+		else if (arg_type == ARG_TGID)
+			cull |= CULL_TGID;
+		else if (arg_type == ARG_COMM)
+			cull |= CULL_COMM;
+		else if (arg_type == ARG_STACKTRACE)
+			cull |= CULL_STACKTRACE;
+		else if (arg_type == ARG_FREE)
+			cull |= CULL_UNRELEASE;
+		else if (arg_type == ARG_ALLOCATOR)
+			cull |= CULL_ALLOCATOR;
+		else {
+			free_explode(args, size);
+			return false;
+		}
+	}
+	free_explode(args, size);
+	if (sc.size == 0)
+		set_single_cmp(compare_num, SORT_DESC);
+	return true;
+}
+
+static void set_single_cmp(int (*cmp)(const void *, const void *), int sign)
+{
+	if (sc.signs == NULL || sc.size < 1)
+		sc.signs = calloc(1, sizeof(int));
+	sc.signs[0] = sign;
+	if (sc.cmps == NULL || sc.size < 1)
+		sc.cmps = calloc(1, sizeof(int *));
+	sc.cmps[0] = cmp;
+	sc.size = 1;
+}
+
+static bool parse_sort_args(const char *arg_str)
+{
+	int size = 0;
+
+	if (sc.size != 0) { /* reset sort_condition */
+		free(sc.signs);
+		free(sc.cmps);
+		size = 0;
+	}
+
+	char **args = explode(',', arg_str, &size);
+
+	sc.signs = calloc(size, sizeof(int));
+	sc.cmps = calloc(size, sizeof(int *));
+	for (int i = 0; i < size; ++i) {
+		int offset = 0;
+
+		sc.signs[i] = SORT_ASC;
+		if (args[i][0] == '-' || args[i][0] == '+') {
+			if (args[i][0] == '-')
+				sc.signs[i] = SORT_DESC;
+			offset = 1;
+		}
+
+		int arg_type = get_arg_type(args[i]+offset);
+
+		if (arg_type == ARG_PID)
+			sc.cmps[i] = compare_pid;
+		else if (arg_type == ARG_TGID)
+			sc.cmps[i] = compare_tgid;
+		else if (arg_type == ARG_COMM)
+			sc.cmps[i] = compare_comm;
+		else if (arg_type == ARG_STACKTRACE)
+			sc.cmps[i] = compare_stacktrace;
+		else if (arg_type == ARG_ALLOC_TS)
+			sc.cmps[i] = compare_ts;
+		else if (arg_type == ARG_FREE_TS)
+			sc.cmps[i] = compare_free_ts;
+		else if (arg_type == ARG_TXT)
+			sc.cmps[i] = compare_txt;
+		else if (arg_type == ARG_ALLOCATOR)
+			sc.cmps[i] = compare_allocator;
+		else {
+			free_explode(args, size);
+			sc.size = 0;
+			return false;
+		}
+	}
+	sc.size = size;
+	free_explode(args, size);
+	return true;
+}
+
+static int *parse_nums_list(char *arg_str, int *list_size)
+{
+	int size = 0;
+	char **args = explode(',', arg_str, &size);
+	int *list = calloc(size, sizeof(int));
+
+	errno = 0;
+	for (int i = 0; i < size; ++i) {
+		char *endptr = NULL;
+
+		list[i] = strtol(args[i], &endptr, 10);
+		if (errno != 0 || endptr == args[i] || *endptr != '\0') {
+			free(list);
+			return NULL;
+		}
+	}
+	*list_size = size;
+	free_explode(args, size);
+	return list;
+}
+
+static void print_allocator(FILE *out, int allocator)
+{
+	fprintf(out, "allocated by ");
+	if (allocator & ALLOCATOR_CMA)
+		fprintf(out, "CMA ");
+	if (allocator & ALLOCATOR_SLAB)
+		fprintf(out, "SLAB ");
+	if (allocator & ALLOCATOR_VMALLOC)
+		fprintf(out, "VMALLOC ");
+	if (allocator & ALLOCATOR_OTHERS)
+		fprintf(out, "OTHERS ");
+}
+
+#define BUF_SIZE	(128 * 1024)
+
+static void usage(void)
+{
+	printf("Usage: ./page_owner_sort [OPTIONS] <input> <output>\n"
+		"-m\t\tSort by total memory.\n"
+		"-s\t\tSort by the stack trace.\n"
+		"-t\t\tSort by times (default).\n"
+		"-p\t\tSort by pid.\n"
+		"-P\t\tSort by tgid.\n"
+		"-n\t\tSort by task command name.\n"
+		"-a\t\tSort by memory allocate time.\n"
+		"-r\t\tSort by memory release time.\n"
+		"-f\t\tFilter out the information of blocks whose memory has been released.\n"
+		"-d\t\tPrint debug information.\n"
+		"--pid <pidlist>\tSelect by pid. This selects the information of blocks whose process ID numbers appear in <pidlist>.\n"
+		"--tgid <tgidlist>\tSelect by tgid. This selects the information of blocks whose Thread Group ID numbers appear in <tgidlist>.\n"
+		"--name <cmdlist>\n\t\tSelect by command name. This selects the information of blocks whose command name appears in <cmdlist>.\n"
+		"--cull <rules>\tCull by user-defined rules.<rules> is a single argument in the form of a comma-separated list with some common fields predefined\n"
+		"--sort <order>\tSpecify sort order as: [+|-]key[,[+|-]key[,...]]\n"
+	);
+}
+
+int main(int argc, char **argv)
+{
+	FILE *fin, *fout;
+	char *buf, *ext_buf;
+	int i, count;
+	struct stat st;
+	int opt;
+	struct option longopts[] = {
+		{ "pid", required_argument, NULL, 1 },
+		{ "tgid", required_argument, NULL, 2 },
+		{ "name", required_argument, NULL, 3 },
+		{ "cull",  required_argument, NULL, 4 },
+		{ "sort",  required_argument, NULL, 5 },
+		{ 0, 0, 0, 0},
+	};
+
+	while ((opt = getopt_long(argc, argv, "adfmnprstP", longopts, NULL)) != -1)
+		switch (opt) {
+		case 'a':
+			set_single_cmp(compare_ts, SORT_ASC);
+			break;
+		case 'd':
+			debug_on = true;
+			break;
+		case 'f':
+			filter = filter | FILTER_UNRELEASE;
+			break;
+		case 'm':
+			set_single_cmp(compare_page_num, SORT_DESC);
+			break;
+		case 'p':
+			set_single_cmp(compare_pid, SORT_ASC);
+			break;
+		case 'r':
+			set_single_cmp(compare_free_ts, SORT_ASC);
+			break;
+		case 's':
+			set_single_cmp(compare_stacktrace, SORT_ASC);
+			break;
+		case 't':
+			set_single_cmp(compare_num, SORT_DESC);
+			break;
+		case 'P':
+			set_single_cmp(compare_tgid, SORT_ASC);
+			break;
+		case 'n':
+			set_single_cmp(compare_comm, SORT_ASC);
+			break;
+		case 1:
+			filter = filter | FILTER_PID;
+			fc.pids = parse_nums_list(optarg, &fc.pids_size);
+			if (fc.pids == NULL) {
+				fprintf(stderr, "wrong/invalid pid in from the command line:%s\n",
+						optarg);
+				exit(1);
+			}
+			break;
+		case 2:
+			filter = filter | FILTER_TGID;
+			fc.tgids = parse_nums_list(optarg, &fc.tgids_size);
+			if (fc.tgids == NULL) {
+				fprintf(stderr, "wrong/invalid tgid in from the command line:%s\n",
+						optarg);
+				exit(1);
+			}
+			break;
+		case 3:
+			filter = filter | FILTER_COMM;
+			fc.comms = explode(',', optarg, &fc.comms_size);
+			break;
+		case 4:
+			if (!parse_cull_args(optarg)) {
+				fprintf(stderr, "wrong argument after --cull option:%s\n",
+						optarg);
+				exit(1);
+			}
+			break;
+		case 5:
+			if (!parse_sort_args(optarg)) {
+				fprintf(stderr, "wrong argument after --sort option:%s\n",
+						optarg);
+				exit(1);
+			}
+			break;
+		default:
+			usage();
+			exit(1);
+		}
+
+	if (optind >= (argc - 1)) {
+		usage();
+		exit(1);
+	}
+
+	fin = fopen(argv[optind], "r");
+	fout = fopen(argv[optind + 1], "w");
+	if (!fin || !fout) {
+		usage();
+		perror("open: ");
+		exit(1);
+	}
+
+	check_regcomp(&order_pattern, "order\\s*([0-9]*),");
+	check_regcomp(&pid_pattern, "pid\\s*([0-9]*),");
+	check_regcomp(&tgid_pattern, "tgid\\s*([0-9]*) ");
+	check_regcomp(&comm_pattern, "tgid\\s*[0-9]*\\s*\\((.*)\\),\\s*ts");
+	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 ... */
+
+	list = malloc(max_size * sizeof(*list));
+	buf = malloc(BUF_SIZE);
+	ext_buf = malloc(BUF_SIZE);
+	if (!list || !buf || !ext_buf) {
+		fprintf(stderr, "Out of memory\n");
+		exit(1);
+	}
+
+	for ( ; ; ) {
+		int buf_len = read_block(buf, ext_buf, BUF_SIZE, fin);
+
+		if (buf_len < 0)
+			break;
+		add_list(buf, buf_len, ext_buf);
+	}
+
+	printf("loaded %d\n", list_size);
+
+	printf("sorting ....\n");
+
+	qsort(list, list_size, sizeof(list[0]), compare_cull_condition);
+
+	printf("culling\n");
+
+	for (i = count = 0; i < list_size; i++) {
+		if (count == 0 ||
+		    compare_cull_condition((void *)(&list[count-1]), (void *)(&list[i])) != 0) {
+			list[count++] = list[i];
+		} else {
+			list[count-1].num += list[i].num;
+			list[count-1].page_num += list[i].page_num;
+		}
+	}
+
+	qsort(list, count, sizeof(list[0]), compare_sort_condition);
+
+	for (i = 0; i < count; i++) {
+		if (cull == 0) {
+			fprintf(fout, "%d times, %d pages, ", list[i].num, list[i].page_num);
+			print_allocator(fout, list[i].allocator);
+			fprintf(fout, ":\n%s\n", list[i].txt);
+		}
+		else {
+			fprintf(fout, "%d times, %d pages",
+					list[i].num, list[i].page_num);
+			if (cull & CULL_PID || filter & FILTER_PID)
+				fprintf(fout, ", PID %d", list[i].pid);
+			if (cull & CULL_TGID || filter & FILTER_TGID)
+				fprintf(fout, ", TGID %d", list[i].tgid);
+			if (cull & CULL_COMM || filter & FILTER_COMM)
+				fprintf(fout, ", task_comm_name: %s", list[i].comm);
+			if (cull & CULL_ALLOCATOR) {
+				fprintf(fout, ", ");
+				print_allocator(fout, list[i].allocator);
+			}
+			if (cull & CULL_UNRELEASE)
+				fprintf(fout, " (%s)",
+						list[i].free_ts_nsec ? "UNRELEASED" : "RELEASED");
+			if (cull & CULL_STACKTRACE)
+				fprintf(fout, ":\n%s", list[i].stacktrace);
+			fprintf(fout, "\n");
+		}
+	}
+	regfree(&order_pattern);
+	regfree(&pid_pattern);
+	regfree(&tgid_pattern);
+	regfree(&comm_pattern);
+	regfree(&ts_nsec_pattern);
+	regfree(&free_ts_nsec_pattern);
+	return 0;
+}