From patchwork Fri Sep 22 06:25:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Max Kellermann X-Patchwork-Id: 13394994 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 BBAB1E7D0CD for ; Fri, 22 Sep 2023 06:26:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231497AbjIVG0c (ORCPT ); Fri, 22 Sep 2023 02:26:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52662 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231356AbjIVG0V (ORCPT ); Fri, 22 Sep 2023 02:26:21 -0400 Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6C27194 for ; Thu, 21 Sep 2023 23:26:12 -0700 (PDT) Received: by mail-ed1-x536.google.com with SMTP id 4fb4d7f45d1cf-530fa34ab80so6784833a12.0 for ; Thu, 21 Sep 2023 23:26:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ionos.com; s=google; t=1695363971; x=1695968771; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=YaYc93wNxc7ZPBHYCHRxs28Q0KfViuylEe4BwwlB5Eg=; b=GRR13ilbskS5+BhKvpk3FnXgyZrlJRbLSTasFdq/jqneRS0TJomdlDqCr2Plxf0HeK 1dwCIH7eWAV6BNGO2nilsT18Qoy0w9imaAXENvhitw8yrosAONVqvJos1A6SGRVwwFer 95x8fbt+T9XJtPGMhLUJwzixJcfqm2ukZsagG2azpJxclJH348ovC3+rHyjtC7P8cf81 xO50LzMjoOpkoGquLjzLDveN39cvCc4VsJzK7ePi78DjRcmap6hhDU/8CnrkosuPh7js ZMpEPhzKhkpdBIKIu8UIymWhQfruqIJnNX7OHQ8lVgqBxtY28fftn4Y/7YTU4wotncnp 13WA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695363971; x=1695968771; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YaYc93wNxc7ZPBHYCHRxs28Q0KfViuylEe4BwwlB5Eg=; b=BuELWrzuxyIdOGby/RALraF+EbsCYPWls+YQmAzQmy4XlPdMQSqrroNW75KPCLx3gl fN8HZtAM+kmQ+yDlOvUkyhs4HkkZSbo7bOyXNJCnIL6fko3AuJEeIAlHU/1XlphznpKp wKe+Xnque7IUXb6hqunLDNdLdSZn3QzLPUQKcNpm53pnt39JpMKcjLtnknwefa5My5re 40LMNzoEXn/2kswMmaGlCGrcChiXcieH0YKCwNYXoeZhY/BGrvYoW1VkcIb08inLUU7m uU+LmnLksuF24K9Wjry6vB6ZdWNdkyNeGrlQ3e/DnCSzR7OlqYDmKVS/1sRYCV3eMpjI p/5w== X-Gm-Message-State: AOJu0YzAFS3mFOfhqMgSq2jcSSs41kQ1o8XjjgjwoXcrqet567U7A2M9 drfEkStiUi6W4jMhIEVcOVTatQ== X-Google-Smtp-Source: AGHT+IH/ZRAtCX4gvnW+Ifx1FSie3lGsh+hZ6gwBPATtidaGzO/PZFYW02eV/1/BVLEp9VjCl0mSkQ== X-Received: by 2002:a17:907:868f:b0:9a5:962c:cb6c with SMTP id qa15-20020a170907868f00b009a5962ccb6cmr2699610ejc.31.1695363971200; Thu, 21 Sep 2023 23:26:11 -0700 (PDT) Received: from heron.intern.cm-ag (p200300dc6f209c00529a4cfffe3dd983.dip0.t-ipconnect.de. [2003:dc:6f20:9c00:529a:4cff:fe3d:d983]) by smtp.gmail.com with ESMTPSA id gy6-20020a170906f24600b00992afee724bsm2195519ejb.76.2023.09.21.23.26.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Sep 2023 23:26:10 -0700 (PDT) From: Max Kellermann To: Xiubo Li , Ilya Dryomov , Jeff Layton Cc: Max Kellermann , ceph-devel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] fs/ceph/debugfs: expose raw metric counters Date: Fri, 22 Sep 2023 08:25:58 +0200 Message-Id: <20230922062558.1739642-2-max.kellermann@ionos.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230922062558.1739642-1-max.kellermann@ionos.com> References: <20230922062558.1739642-1-max.kellermann@ionos.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org To enable userspace to calculate the current latency, not just the average latency since the filesystem was mounted. We have been running this patch for a while on our servers and our Prometheus exporter collects these statistics: https://github.com/CM4all/Prometheus-Exporters/ https://github.com/CM4all/Prometheus-Exporters/blob/master/src/KernelExporter.cxx Signed-off-by: Max Kellermann --- fs/ceph/debugfs.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c index 2abee7e18144..d13a1ab8822a 100644 --- a/fs/ceph/debugfs.c +++ b/fs/ceph/debugfs.c @@ -170,6 +170,30 @@ static const char * const metric_str[] = { "metadata", "copyfrom" }; + +static int metrics_counters_show(struct seq_file *s, void *p) +{ + struct ceph_fs_client *fsc = s->private; + struct ceph_client_metric *cm = &fsc->mdsc->metric; + u64 count, size_bytes, wait_ns; + + seq_printf(s, "item count size_bytes wait_ns\n"); + + for (unsigned i = 0; i < METRIC_MAX; i++) { + struct ceph_metric *m = &cm->metric[i]; + spin_lock(&m->lock); + count = m->total; + size_bytes = m->size_sum; + wait_ns = ktime_to_ns(m->latency_sum); + spin_unlock(&m->lock); + + seq_printf(s, "%s %llu %llu %llu\n", + metric_str[i], count, size_bytes, wait_ns); + } + + return 0; +} + static int metrics_latency_show(struct seq_file *s, void *p) { struct ceph_fs_client *fsc = s->private; @@ -368,6 +392,7 @@ DEFINE_SHOW_ATTRIBUTE(caps); DEFINE_SHOW_ATTRIBUTE(mds_sessions); DEFINE_SHOW_ATTRIBUTE(status); DEFINE_SHOW_ATTRIBUTE(metrics_file); +DEFINE_SHOW_ATTRIBUTE(metrics_counters); DEFINE_SHOW_ATTRIBUTE(metrics_latency); DEFINE_SHOW_ATTRIBUTE(metrics_size); DEFINE_SHOW_ATTRIBUTE(metrics_caps); @@ -463,6 +488,8 @@ void ceph_fs_debugfs_init(struct ceph_fs_client *fsc) debugfs_create_file("file", 0444, fsc->debugfs_metrics_dir, fsc, &metrics_file_fops); + debugfs_create_file("counters", 0444, fsc->debugfs_metrics_dir, fsc, + &metrics_counters_fops); debugfs_create_file("latency", 0444, fsc->debugfs_metrics_dir, fsc, &metrics_latency_fops); debugfs_create_file("size", 0444, fsc->debugfs_metrics_dir, fsc,