From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34B12C433E2 for ; Thu, 3 Sep 2020 14:24:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 038C2206EB for ; Thu, 3 Sep 2020 14:24:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="VTDWD31m" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729081AbgICOYC (ORCPT ); Thu, 3 Sep 2020 10:24:02 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:48612 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728896AbgICOVP (ORCPT ); Thu, 3 Sep 2020 10:21:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1599142872; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YPC0vmrw/c7NFQjl7S2KULkVJorDJYG86GyJeXr5f8w=; b=VTDWD31mBOuin3CLxiHZJUbRAQ83HAuk27YFBOr9KoJL3+1SKxbRPazfxHwMiuDXsrPeWe neqPKlVsCYf2re4nzbj3fA6CwP/ru6C7uoQywMHwQamJz7C0/ziUwwUAa0DiBWefW4h7aV YBPXdYMfy2vQIDx3U7Unk8j/h6Qb+gY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-53-TAOeQJFbOaq6HoFy9KyRGQ-1; Thu, 03 Sep 2020 10:21:06 -0400 X-MC-Unique: TAOeQJFbOaq6HoFy9KyRGQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 99810873081; Thu, 3 Sep 2020 14:21:05 +0000 (UTC) Received: from [10.72.12.50] (ovpn-12-50.pek2.redhat.com [10.72.12.50]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6987710013D9; Thu, 3 Sep 2020 14:21:03 +0000 (UTC) Subject: Re: [PATCH v5 2/2] ceph: metrics for opened files, pinned caps and opened inodes To: Jeff Layton Cc: idryomov@gmail.com, zyan@redhat.com, pdonnell@redhat.com, ceph-devel@vger.kernel.org References: <20200903130140.799392-1-xiubli@redhat.com> <20200903130140.799392-3-xiubli@redhat.com> <6f51c4caa59e4ec02b5676f8363563f1e02b3776.camel@kernel.org> From: Xiubo Li Message-ID: <4418a0cd-aded-40b0-c044-0ef1a402a46b@redhat.com> Date: Thu, 3 Sep 2020 22:20:59 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <6f51c4caa59e4ec02b5676f8363563f1e02b3776.camel@kernel.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org On 2020/9/3 22:16, Jeff Layton wrote: > On Thu, 2020-09-03 at 09:01 -0400, xiubli@redhat.com wrote: >> From: Xiubo Li >> >> In client for each inode, it may have many opened files and may >> have been pinned in more than one MDS servers. And some inodes >> are idle, which have no any opened files. >> >> This patch will show these metrics in the debugfs, likes: >> >> item total >> ----------------------------------------- >> opened files / total inodes 14 / 5 >> pinned i_caps / total inodes 7 / 5 >> opened inodes / total inodes 3 / 5 >> >> Will send these metrics to ceph, which will be used by the `fs top`, >> later. >> >> URL: https://tracker.ceph.com/issues/47005 >> Signed-off-by: Xiubo Li >> --- >> fs/ceph/caps.c | 38 ++++++++++++++++++++++++++++++++++++-- >> fs/ceph/debugfs.c | 11 +++++++++++ >> fs/ceph/file.c | 5 +++-- >> fs/ceph/inode.c | 6 ++++++ >> fs/ceph/metric.c | 14 ++++++++++++++ >> fs/ceph/metric.h | 7 +++++++ >> 6 files changed, 77 insertions(+), 4 deletions(-) >> >> diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c >> index 0120fcb3503e..f09461fe569b 100644 >> --- a/fs/ceph/caps.c >> +++ b/fs/ceph/caps.c >> @@ -4283,13 +4283,30 @@ void __ceph_touch_fmode(struct ceph_inode_info *ci, >> >> void ceph_get_fmode(struct ceph_inode_info *ci, int fmode, int count) >> { >> - int i; >> + struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(ci->vfs_inode.i_sb); >> int bits = (fmode << 1) | 1; >> + bool is_opened = false; >> + int i; >> + >> + if (count == 1) >> + atomic64_inc(&mdsc->metric.opened_files); >> + >> spin_lock(&ci->i_ceph_lock); >> for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { >> if (bits & (1 << i)) >> ci->i_nr_by_mode[i] += count; >> + >> + /* >> + * If any of the mode ref is larger than 1, >> + * that means it has been already opened by >> + * others. Just skip checking the PIN ref. >> + */ >> + if (i && ci->i_nr_by_mode[i] > 1) >> + is_opened = true; >> } >> + >> + if (!is_opened) >> + percpu_counter_inc(&mdsc->metric.opened_inodes); >> spin_unlock(&ci->i_ceph_lock); >> } >> >> @@ -4300,15 +4317,32 @@ void ceph_get_fmode(struct ceph_inode_info *ci, int fmode, int count) >> */ >> void ceph_put_fmode(struct ceph_inode_info *ci, int fmode, int count) >> { >> - int i; >> + struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(ci->vfs_inode.i_sb); >> int bits = (fmode << 1) | 1; >> + bool is_closed = true; >> + int i; >> + >> + if (count == 1) >> + atomic64_dec(&mdsc->metric.opened_files); >> + >> spin_lock(&ci->i_ceph_lock); >> for (i = 0; i < CEPH_FILE_MODE_BITS; i++) { >> if (bits & (1 << i)) { >> BUG_ON(ci->i_nr_by_mode[i] < count); >> ci->i_nr_by_mode[i] -= count; >> } >> + >> + /* >> + * If any of the mode ref is not 0 after >> + * decreased, that means it is still opened >> + * by others. Just skip checking the PIN ref. >> + */ >> + if (i && ci->i_nr_by_mode[i]) >> + is_closed = false; >> } >> + >> + if (is_closed) >> + percpu_counter_dec(&mdsc->metric.opened_inodes); >> spin_unlock(&ci->i_ceph_lock); >> } >> >> diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c >> index 97539b497e4c..9efd3982230d 100644 >> --- a/fs/ceph/debugfs.c >> +++ b/fs/ceph/debugfs.c >> @@ -148,6 +148,17 @@ static int metric_show(struct seq_file *s, void *p) >> int nr_caps = 0; >> s64 total, sum, avg, min, max, sq; >> >> + sum = percpu_counter_sum(&m->total_inodes); >> + seq_printf(s, "item total\n"); >> + seq_printf(s, "------------------------------------------\n"); >> + seq_printf(s, "%-35s%lld / %lld\n", "opened files / total inodes", >> + atomic64_read(&m->opened_files), sum); >> + seq_printf(s, "%-35s%lld / %lld\n", "pinned i_caps / total inodes", >> + atomic64_read(&m->total_caps), sum); >> + seq_printf(s, "%-35s%lld / %lld\n", "opened inodes / total inodes", >> + percpu_counter_sum(&m->opened_inodes), sum); >> + >> + seq_printf(s, "\n"); >> seq_printf(s, "item total avg_lat(us) min_lat(us) max_lat(us) stdev(us)\n"); >> seq_printf(s, "-----------------------------------------------------------------------------------\n"); >> >> diff --git a/fs/ceph/file.c b/fs/ceph/file.c >> index 29ee5f2e394a..c63ddf7e054b 100644 >> --- a/fs/ceph/file.c >> +++ b/fs/ceph/file.c >> @@ -211,8 +211,9 @@ static int ceph_init_file_info(struct inode *inode, struct file *file, >> BUG_ON(inode->i_fop->release != ceph_release); >> >> if (isdir) { >> - struct ceph_dir_file_info *dfi = >> - kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); >> + struct ceph_dir_file_info *dfi; >> + >> + dfi = kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); >> if (!dfi) >> return -ENOMEM; >> > ^^^ > Unrelated delta here? I'll plan to drop this hunk if there are no > objections. > Yeah, sure. This should be introduced in a previous version and there has some other changes would depend on it, but that changes was removed later and this was forgot. Thanks Jeff. >> diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c >> index 9210cd1e859d..f2764159e05b 100644 >> --- a/fs/ceph/inode.c >> +++ b/fs/ceph/inode.c >> @@ -426,6 +426,7 @@ static int ceph_fill_fragtree(struct inode *inode, >> */ >> struct inode *ceph_alloc_inode(struct super_block *sb) >> { >> + struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); >> struct ceph_inode_info *ci; >> int i; >> >> @@ -525,12 +526,17 @@ struct inode *ceph_alloc_inode(struct super_block *sb) >> >> ci->i_meta_err = 0; >> >> + percpu_counter_inc(&mdsc->metric.total_inodes); >> + >> return &ci->vfs_inode; >> } >> >> void ceph_free_inode(struct inode *inode) >> { >> struct ceph_inode_info *ci = ceph_inode(inode); >> + struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); >> + >> + percpu_counter_dec(&mdsc->metric.total_inodes); >> >> kfree(ci->i_symlink); >> kmem_cache_free(ceph_inode_cachep, ci); >> diff --git a/fs/ceph/metric.c b/fs/ceph/metric.c >> index 2466b261fba2..fee4c4778313 100644 >> --- a/fs/ceph/metric.c >> +++ b/fs/ceph/metric.c >> @@ -192,11 +192,23 @@ int ceph_metric_init(struct ceph_client_metric *m) >> m->total_metadatas = 0; >> m->metadata_latency_sum = 0; >> >> + atomic64_set(&m->opened_files, 0); >> + ret = percpu_counter_init(&m->opened_inodes, 0, GFP_KERNEL); >> + if (ret) >> + goto err_opened_inodes; >> + ret = percpu_counter_init(&m->total_inodes, 0, GFP_KERNEL); >> + if (ret) >> + goto err_total_inodes; >> + >> m->session = NULL; >> INIT_DELAYED_WORK(&m->delayed_work, metric_delayed_work); >> >> return 0; >> >> +err_total_inodes: >> + percpu_counter_destroy(&m->opened_inodes); >> +err_opened_inodes: >> + percpu_counter_destroy(&m->i_caps_mis); >> err_i_caps_mis: >> percpu_counter_destroy(&m->i_caps_hit); >> err_i_caps_hit: >> @@ -212,6 +224,8 @@ void ceph_metric_destroy(struct ceph_client_metric *m) >> if (!m) >> return; >> >> + percpu_counter_destroy(&m->total_inodes); >> + percpu_counter_destroy(&m->opened_inodes); >> percpu_counter_destroy(&m->i_caps_mis); >> percpu_counter_destroy(&m->i_caps_hit); >> percpu_counter_destroy(&m->d_lease_mis); >> diff --git a/fs/ceph/metric.h b/fs/ceph/metric.h >> index 1d0959d669d7..710f3f1dceab 100644 >> --- a/fs/ceph/metric.h >> +++ b/fs/ceph/metric.h >> @@ -115,6 +115,13 @@ struct ceph_client_metric { >> ktime_t metadata_latency_min; >> ktime_t metadata_latency_max; >> >> + /* The total number of directories and files that are opened */ >> + atomic64_t opened_files; >> + >> + /* The total number of inodes that have opened files or directories */ >> + struct percpu_counter opened_inodes; >> + struct percpu_counter total_inodes; >> + >> struct ceph_mds_session *session; >> struct delayed_work delayed_work; /* delayed work */ >> };