From patchwork Fri Apr 22 20:26:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Gushchin X-Patchwork-Id: 12824071 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B72DC433EF for ; Fri, 22 Apr 2022 20:27:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 08E8C6B0080; Fri, 22 Apr 2022 16:27:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 03D8B6B0081; Fri, 22 Apr 2022 16:27:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E493F6B0083; Fri, 22 Apr 2022 16:27:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id D59B76B0080 for ; Fri, 22 Apr 2022 16:27:18 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay13.hostedemail.com (Postfix) with ESMTP id B5DF860946 for ; Fri, 22 Apr 2022 20:27:18 +0000 (UTC) X-FDA: 79385649756.08.07D32D2 Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf03.hostedemail.com (Postfix) with ESMTP id 1649D2001F for ; Fri, 22 Apr 2022 20:27:15 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1650659237; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nIcEPpdyLCFHehrF6EjwfH/S8rR+FWD7FuLOrsoav4I=; b=LYCD2BdGVPfWh3NvaVHOatAgiYmQELzvA6f2uljVJALCl2Y667IjSVrZTJyc3jlXv2JbvP cWB6Ep+t9wpg1Z0UPJC0GseF1KAS7gyUNhXQzk0cduiOIY/y2Bl9n2FFqLQK/0hur4ikoy 0GoBMKQXmj0q7nvZQYfJIFudeUnygSM= From: Roman Gushchin To: Andrew Morton , linux-mm@kvack.org Cc: Dave Chinner , linux-kernel@vger.kernel.org, Yang Shi , Kent Overstreet , Hillf Danton , Roman Gushchin Subject: [PATCH v2 7/7] tools: add memcg_shrinker.py Date: Fri, 22 Apr 2022 13:26:44 -0700 Message-Id: <20220422202644.799732-8-roman.gushchin@linux.dev> In-Reply-To: <20220422202644.799732-1-roman.gushchin@linux.dev> References: <20220422202644.799732-1-roman.gushchin@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Stat-Signature: dfdh7xrjh139rn1pswfsbjhx31qnoomb X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 1649D2001F X-Rspam-User: Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=LYCD2BdG; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf03.hostedemail.com: domain of roman.gushchin@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev X-HE-Tag: 1650659235-103588 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 | head -n 10 2092 sb-sysfs-26 /sys/fs/cgroup/system.slice 1809 sb-sysfs-26 /sys/fs/cgroup/system.slice/systemd-udevd.service 1350 sb-btrfs-24 /sys/fs/cgroup/system.slice 1016 sb-btrfs-24 /sys/fs/cgroup/system.slice/system-dbus\x2d:1.3\x2dorg.fedoraproject.Setroubleshootd.slice 861 sb-btrfs-24 /sys/fs/cgroup/system.slice/system-dbus\x2d:1.3\x2dorg.fedoraproject.SetroubleshootPrivileged.slice 672 sb-btrfs-24 /sys/fs/cgroup/system.slice/firewalld.service 655 sb-cgroup2-30 /sys/fs/cgroup/init.scope 275 sb-sysfs-26 / 232 sb-btrfs-24 / 221 sb-proc-25 /sys/fs/cgroup/system.slice/systemd-journald.service Signed-off-by: Roman Gushchin --- tools/cgroup/memcg_shrinker.py | 70 ++++++++++++++++++++++++++++++++++ 1 file changed, 70 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..9c32bf0247b2 --- /dev/null +++ b/tools/cgroup/memcg_shrinker.py @@ -0,0 +1,70 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2022 Roman Gushchin +# 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_memcg_path = os.path.join(root, shrinker, "count_memcg") + try: + with open(count_memcg_path) as f: + for line in f.readlines(): + items = line.split(' ') + ino = int(items[0]) + shrinkers.append((int(items[1]), shrinker, ino)) + except FileNotFoundError: + count_path = os.path.join(root, shrinker, "count") + with open(count_path) as f: + shrinkers.append((int(f.readline()), shrinker, 0)) + + # (count, shrinker, memcg ino) + return shrinkers + + +def main(): + cgroups = scan_cgroups("/sys/fs/cgroup/") + shrinkers = scan_shrinkers("/sys/kernel/debug/shrinker/") + shrinkers = sorted(shrinkers, reverse = True, key = lambda x: x[0]) + + for s in shrinkers: + count = s[0] + name = s[1] + ino = 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)) + + +if __name__ == '__main__': + main()