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Date: Tue, 1 Mar 2022 23:14:38 +0800
From: Jiajian Ye <yejiajian2018@...il.szu.edu.cn>
To: akpm@...ux-foundation.org
Cc: sfr@...b.auug.org.au, caoyixuan2019@...il.szu.edu.cn,
hanshenghong2019@...il.szu.edu.cn,
zhaochongxi2019@...il.szu.edu.cn, weizhenliang@...wei.com,
zhangyinan2019@...il.szu.edu.cn, linux-kernel@...r.kernel.org,
Jiajian Ye <yejiajian2018@...il.szu.edu.cn>
Subject: [PATCH 3/3] tools/vm/page_owner_sort.c: support sorting by tgid and update documentation
When the "page owner" information is read, the information sorted
by TGID is expected.
As a result, the following adjustments have been made:
1. Add a new -P option to sort the information of blocks by TGID
in ascending order.
2. Adjust the order of member variables in block_list strust
to avoid one 4 byte hole.
3. Add -P option explanation in the document.
Signed-off-by: Jiajian Ye <yejiajian2018@...il.szu.edu.cn>
---
Documentation/vm/page_owner.rst | 1 +
tools/vm/page_owner_sort.c | 40 ++++++++++++++++++++++++++++++---
2 files changed, 38 insertions(+), 3 deletions(-)
diff --git a/Documentation/vm/page_owner.rst b/Documentation/vm/page_owner.rst
index 2ddb632d847b..941543a797fe 100644
--- a/Documentation/vm/page_owner.rst
+++ b/Documentation/vm/page_owner.rst
@@ -116,6 +116,7 @@ Usage
-a Sort by memory allocation time.
-m Sort by total memory.
-p Sort by pid.
+ -P Sort by tgid.
-r Sort by memory release time.
-s Sort by stack trace.
-t Sort by times (default).
diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
index 69fb6ca7c0b7..d166f2f900eb 100644
--- a/tools/vm/page_owner_sort.c
+++ b/tools/vm/page_owner_sort.c
@@ -25,16 +25,18 @@
struct block_list {
char *txt;
char *stacktrace;
+ __u64 ts_nsec;
+ __u64 free_ts_nsec;
int len;
int num;
int page_num;
pid_t pid;
- __u64 ts_nsec;
- __u64 free_ts_nsec;
+ pid_t tgid;
};
static regex_t order_pattern;
static regex_t pid_pattern;
+static regex_t tgid_pattern;
static regex_t ts_nsec_pattern;
static regex_t free_ts_nsec_pattern;
static struct block_list *list;
@@ -91,6 +93,13 @@ static int compare_pid(const void *p1, const void *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_ts(const void *p1, const void *p2)
{
const struct block_list *l1 = p1, *l2 = p2;
@@ -170,6 +179,24 @@ static pid_t get_pid(char *buf)
}
+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') {
+ printf("wrong/invalid tgid in follow buf:\n%s\n", buf);
+ return -1;
+ }
+
+ return tgid;
+
+}
+
static __u64 get_ts_nsec(char *buf)
{
__u64 ts_nsec;
@@ -231,6 +258,7 @@ static void add_list(char *buf, int 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].tgid = get_tgid(buf);
list[list_size].ts_nsec = get_ts_nsec(buf);
list[list_size].free_ts_nsec = get_free_ts_nsec(buf);
list_size++;
@@ -249,6 +277,7 @@ static void usage(void)
"-s Sort by the stack trace.\n"
"-t Sort by times (default).\n"
"-p Sort by pid.\n"
+ "-P Sort by tgid.\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"
@@ -268,7 +297,7 @@ int main(int argc, char **argv)
struct stat st;
int opt;
- while ((opt = getopt(argc, argv, "acfmprst")) != -1)
+ while ((opt = getopt(argc, argv, "acfmprstP")) != -1)
switch (opt) {
case 'a':
cmp = compare_ts;
@@ -294,6 +323,9 @@ int main(int argc, char **argv)
case 't':
cmp = compare_num;
break;
+ case 'P':
+ cmp = compare_tgid;
+ break;
default:
usage();
exit(1);
@@ -314,6 +346,7 @@ int main(int argc, char **argv)
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(&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);
@@ -373,6 +406,7 @@ int main(int argc, char **argv)
}
regfree(&order_pattern);
regfree(&pid_pattern);
+ regfree(&tgid_pattern);
regfree(&ts_nsec_pattern);
regfree(&free_ts_nsec_pattern);
return 0;
--
2.25.1
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