From nobody Sun Feb 8 14:07:19 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7AF21C77B7A for ; Wed, 31 May 2023 08:20:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235039AbjEaIUu (ORCPT ); Wed, 31 May 2023 04:20:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235216AbjEaIUp (ORCPT ); Wed, 31 May 2023 04:20:45 -0400 Received: from mailout2.samsung.com (mailout2.samsung.com [203.254.224.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3EE7613E for ; Wed, 31 May 2023 01:20:42 -0700 (PDT) Received: from epcas2p1.samsung.com (unknown [182.195.41.53]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20230531082040epoutp0279eb6d839391642a617f37072a6404b6~kLKM7hJUB2990829908epoutp02K for ; Wed, 31 May 2023 08:20:40 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20230531082040epoutp0279eb6d839391642a617f37072a6404b6~kLKM7hJUB2990829908epoutp02K DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1685521240; bh=ebFaz6q3K4kRvSJEYLl/6SHwuQr/hdkSGQ9G1SAZCWU=; h=Subject:Reply-To:From:To:CC:Date:References:From; b=Qt+3jeFMeeiaBmGllKtJ/PUYnRgfQtej/t8aJi0AOT4x9oyJ+fqdDOf6HjRViS7hO hgusyaQ4NPC0Xax5n5jXNCPGsOPhN67u2kfY6MhKGB+HDR1JzzEmDb/6O58oS4uUJn HCfc8AmPnpTxOymdM6oOjONolRoB2w2/jS+qJJK0= Received: from epsnrtp3.localdomain (unknown [182.195.42.164]) by epcas2p4.samsung.com (KnoxPortal) with ESMTP id 20230531082039epcas2p4cf7201fd5926c1529069eea90c44df4a~kLKMj4BS81066510665epcas2p4m; Wed, 31 May 2023 08:20:39 +0000 (GMT) Received: from epsmges2p3.samsung.com (unknown [182.195.36.99]) by epsnrtp3.localdomain (Postfix) with ESMTP id 4QWMdz13rXz4x9Q9; Wed, 31 May 2023 08:20:39 +0000 (GMT) X-AuditID: b6c32a47-157fd70000001ce0-49-64770356fd80 Received: from epcas2p3.samsung.com ( [182.195.41.55]) by epsmges2p3.samsung.com (Symantec Messaging Gateway) with SMTP id 41.53.07392.65307746; Wed, 31 May 2023 17:20:38 +0900 (KST) Mime-Version: 1.0 Subject: [PATCH] f2fs: including waf data in f2fs status information Reply-To: beomsu7.kim@samsung.com Sender: beomsu kim From: beomsu kim To: "jaegeuk@kernel.org" , "chao@kernel.org" , "linux-f2fs-devel@lists.sourceforge.net" , "linux-kernel@vger.kernel.org" CC: Yonggil Song , Seokhwan Kim , Daejun Park , Seonghun Kim X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <20230531082038epcms2p256f9db0d7ac377d404694354db1c3ebc@epcms2p2> Date: Wed, 31 May 2023 17:20:38 +0900 X-CMS-MailID: 20230531082038epcms2p256f9db0d7ac377d404694354db1c3ebc Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrHKsWRmVeSWpSXmKPExsWy7bCmuW4Yc3mKwdcTUhanp55lslj1INzi yfpZzBaXFrlbXN41h83i9Q85i1Udcxktpp4/wuTA4bFpVSebx+4Fn5k8+rasYvT4vEkugCUq 2yYjNTEltUghNS85PyUzL91WyTs43jne1MzAUNfQ0sJcSSEvMTfVVsnFJ0DXLTMH6AYlhbLE nFKgUEBicbGSvp1NUX5pSapCRn5xia1SakFKToF5gV5xYm5xaV66Xl5qiZWhgYGRKVBhQnbG hZO3WQpO81ScORLTwLieq4uRg0NCwETi6l2TLkYuDiGBHYwSU7ZdYQOJ8woISvzdIdzFyMkh LOAi8WrDBUYQW0hAUaKveQNYibCAjsSSLcYgYTYBLYnu62eYQWwRgVeMEmdWi4KMZBZYxSix uPUyWEJCgFdiRvtTFghbWmL78q2MELaGxI9lvVA1ohI3V79lh7HfH5sPVSMi0XrvLFSNoMSD n7uh4hISr3/CzM+X+P77IyPIYgmBFkaJnT1zoBL6Etv+zAZbzCvgK/Fz210wm0VAVeLAntdQ NS4S11+/AhvKLCAvsf0tSC8HkK0psX6XPiSolCWO3GKBqOCT6Dj8lx3mrR3znjBBlKhKdINC hx3sww4DiAIPiZ6dndDwC5TY0PmebQKjwixEKM9CsnQWwtIFjMyrGMVSC4pz01OLjQqM4dGa nJ+7iRGcELXcdzDOePtB7xAjEwfjIUYJDmYlEV7bxOIUId6UxMqq1KL8+KLSnNTiQ4ymQO9O ZJYSTc4HpuS8knhDE0sDEzMzQ3MjUwNzJXFeaduTyUIC6YklqdmpqQWpRTB9TBycUg1MG9I2 LZZq6D0qzBDPNbd/b7vDoYtcP8MFr/zw72b9bL2kZp1KuGWoduvjn446ui23+pVPnHu4J/v2 2rjEXbOc37s9+Nk1o3hrWktgpI2xjL+sgV4h24WkSes13bXEFUQsxfq0kz11Hxze4iX0N3LG JqdHTnc2WahmzDGO/8HGlu/53XnXUa1pn2R89P7MPHVSaPGJgr4jM+8XRsnwXWJI+aCr82qC z6SZ7AKPoxeZTrr70OM7w/o7Sy4brLwZUu1Trp0asN338LfHC+b+b/Keu/G2mu+mkIg0aYHk PZ7mHVzJjH4y93zW1CnUXXg28eOVLZ5dP3jrdJfkq52IcJGxERUPmNPSrmbtoqa27LISS3FG oqEWc1FxIgChB4pIEQQAAA== DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230531082038epcms2p256f9db0d7ac377d404694354db1c3ebc References: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When evaluating in f2fs, it takes much time to obtain waf data. This patch helps to obtain waf data without calcluation. Signed-off-by: Beomsu Kim --- fs/f2fs/iostat.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c index 3d5bfb1ad585..6ae9659d69e7 100644 --- a/fs/f2fs/iostat.c +++ b/fs/f2fs/iostat.c @@ -34,10 +34,22 @@ int __maybe_unused iostat_info_seq_show(struct seq_file= *seq, void *offset) { struct super_block *sb =3D seq->private; struct f2fs_sb_info *sbi =3D F2FS_SB(sb); + struct f2fs_stat_info *si =3D F2FS_STAT(sbi); + int j; + unsigned long long waf =3D 0; + unsigned long long data_written_to_storage =3D 0, data_written_by_user = =3D 0; =20 if (!sbi->iostat_enable) return 0; =20 + for (j =3D FS_DATA_IO; j <=3D FS_CP_META_IO; j++) + data_written_to_storage +=3D si->sbi->iostat_bytes[j]; + for (j =3D FS_DATA_IO; j <=3D FS_CDATA_IO; j++) + data_written_by_user +=3D si->sbi->iostat_bytes[j]; + + if (data_written_by_user > 0) + waf =3D data_written_to_storage * 100 / data_written_by_user; + seq_printf(seq, "time: %-16llu\n", ktime_get_real_seconds()); seq_printf(seq, "\t\t\t%-16s %-16s %-16s\n", "io_bytes", "count", "avg_bytes"); @@ -81,6 +93,10 @@ int __maybe_unused iostat_info_seq_show(struct seq_file = *seq, void *offset) IOSTAT_INFO_SHOW("fs discard", FS_DISCARD_IO); IOSTAT_INFO_SHOW("fs flush", FS_FLUSH_IO); =20 + /* print waf */ + seq_puts(seq, "[WAF]\n"); + seq_printf(seq, "fs waf: %llu.%02llu\n", waf / 100, waf % 100); + return 0; } =20 --=20 2.17.1