From: Roman Gushchin <roman.gushchin@linux.dev>
To: Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org
Cc: Dave Chinner <dchinner@redhat.com>,
linux-kernel@vger.kernel.org,
Kent Overstreet <kent.overstreet@gmail.com>,
Hillf Danton <hdanton@sina.com>,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
Roman Gushchin <roman.gushchin@linux.dev>
Subject: [PATCH v3 5/6] tools: add memcg_shrinker.py
Date: Mon, 9 May 2022 11:38:19 -0700 [thread overview]
Message-ID: <20220509183820.573666-6-roman.gushchin@linux.dev> (raw)
In-Reply-To: <20220509183820.573666-1-roman.gushchin@linux.dev>
Add a simple tool which prints a sorted list of shrinker lists
in the following format: (number of objects, shrinker name, cgroup).
Example:
$ ./memcg_shrinker.py -n 10
2090 sb-sysfs-26 /sys/fs/cgroup/system.slice
1809 sb-sysfs-26 /sys/fs/cgroup/system.slice/systemd-udevd.service
1044 sb-btrfs:vda2-24 /sys/fs/cgroup/system.slice/system-dbus\x2d:1.3\...
861 sb-btrfs:vda2-24 /sys/fs/cgroup/system.slice/system-dbus\x2d:1.3\...
804 sb-btrfs:vda2-24 /sys/fs/cgroup/system.slice
643 sb-btrfs:vda2-24 /sys/fs/cgroup/system.slice/firewalld.service
616 sb-cgroup2-30 /sys/fs/cgroup/init.scope
275 sb-sysfs-26 /
238 sb-proc-25 /sys/fs/cgroup/system.slice/systemd-journald.service
225 sb-proc-25 /sys/fs/cgroup/system.slice/abrtd.service
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
---
tools/cgroup/memcg_shrinker.py | 71 ++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
create mode 100755 tools/cgroup/memcg_shrinker.py
diff --git a/tools/cgroup/memcg_shrinker.py b/tools/cgroup/memcg_shrinker.py
new file mode 100755
index 000000000000..706ab27666a4
--- /dev/null
+++ b/tools/cgroup/memcg_shrinker.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2022 Roman Gushchin <roman.gushchin@linux.dev>
+# Copyright (C) 2022 Meta
+
+import os
+import argparse
+import sys
+
+
+def scan_cgroups(cgroup_root):
+ cgroups = {}
+
+ for root, subdirs, _ in os.walk(cgroup_root):
+ for cgroup in subdirs:
+ path = os.path.join(root, cgroup)
+ ino = os.stat(path).st_ino
+ cgroups[ino] = path
+
+ # (memcg ino, path)
+ return cgroups
+
+
+def scan_shrinkers(shrinker_debugfs):
+ shrinkers = []
+
+ for root, subdirs, _ in os.walk(shrinker_debugfs):
+ for shrinker in subdirs:
+ count_path = os.path.join(root, shrinker, "count")
+ with open(count_path) as f:
+ for line in f.readlines():
+ items = line.split(' ')
+ ino = int(items[0])
+ # (count, shrinker, memcg ino)
+ shrinkers.append((int(items[1]), shrinker, ino))
+ return shrinkers
+
+
+def main():
+ parser = argparse.ArgumentParser(description='Display biggest shrinkers')
+ parser.add_argument('-n', '--lines', type=int, help='Number of lines to print')
+
+ args = parser.parse_args()
+
+ cgroups = scan_cgroups("/sys/fs/cgroup/")
+ shrinkers = scan_shrinkers("/sys/kernel/debug/shrinker/")
+ shrinkers = sorted(shrinkers, reverse = True, key = lambda x: x[0])
+
+ n = 0
+ for s in shrinkers:
+ count, name, ino = (s[0], s[1], s[2])
+ if count == 0:
+ break
+
+ if ino == 0 or ino == 1:
+ cg = "/"
+ else:
+ try:
+ cg = cgroups[ino]
+ except KeyError:
+ cg = "unknown (%d)" % ino
+
+ print("%-8s %-20s %s" % (count, name, cg))
+
+ n += 1
+ if args.lines and n >= args.lines:
+ break
+
+
+if __name__ == '__main__':
+ main()
--
2.35.3
next prev parent reply other threads:[~2022-05-09 18:38 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-09 18:38 [PATCH v3 0/6] mm: introduce shrinker debugfs interface Roman Gushchin
2022-05-09 18:38 ` [PATCH v3 1/6] mm: memcontrol: introduce mem_cgroup_ino() and mem_cgroup_get_from_ino() Roman Gushchin
2022-05-22 7:05 ` Muchun Song
2022-05-23 18:12 ` Roman Gushchin
2022-05-24 2:00 ` Muchun Song
2022-05-09 18:38 ` [PATCH v3 2/6] mm: shrinkers: introduce debugfs interface for memory shrinkers Roman Gushchin
2022-05-20 16:45 ` Kent Overstreet
2022-05-21 0:27 ` Roman Gushchin
2022-05-20 16:58 ` Christophe JAILLET
2022-05-20 17:00 ` Kent Overstreet
2022-05-21 0:27 ` Roman Gushchin
2022-05-22 10:36 ` Muchun Song
2022-05-23 18:24 ` Roman Gushchin
2022-05-24 2:06 ` Muchun Song
2022-05-09 18:38 ` [PATCH v3 3/6] mm: shrinkers: provide shrinkers with names Roman Gushchin
2022-05-20 16:41 ` Kent Overstreet
2022-05-21 0:31 ` Roman Gushchin
2022-05-22 11:08 ` Muchun Song
2022-05-23 22:06 ` Roman Gushchin
2022-05-24 9:12 ` Muchun Song
2022-05-22 22:13 ` Dave Chinner
2022-05-24 2:18 ` Roman Gushchin
2022-05-24 23:54 ` Roman Gushchin
2022-05-09 18:38 ` [PATCH v3 4/6] mm: docs: document shrinker debugfs Roman Gushchin
2022-05-09 18:38 ` Roman Gushchin [this message]
2022-05-09 18:38 ` [PATCH v3 6/6] mm: shrinkers: add scan interface for " Roman Gushchin
2022-05-22 11:35 ` Muchun Song
2022-05-23 20:54 ` Roman Gushchin
2022-05-24 2:23 ` Muchun Song
2022-05-19 17:15 ` [PATCH v3 0/6] mm: introduce shrinker debugfs interface Roman Gushchin
2022-05-20 4:33 ` Dave Chinner
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