From patchwork Sun Jun 28 08:42:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiubo Li X-Patchwork-Id: 11629965 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0176A138C for ; Sun, 28 Jun 2020 08:42:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D2129206D7 for ; Sun, 28 Jun 2020 08:42:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="gVtFcMUs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726055AbgF1Img (ORCPT ); Sun, 28 Jun 2020 04:42:36 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:38636 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726105AbgF1Img (ORCPT ); Sun, 28 Jun 2020 04:42:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593333754; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:in-reply-to:in-reply-to:references:references; bh=lN3Z8+PYz3ibbgnOa0vbBYKkClaCPVwVP/s9CCIBiBU=; b=gVtFcMUsxyR1+/Xe16aBDxZKIm/uuv7GCZuHGtCCymz6zM3OEtB5iB5h94Ek7YOjsun8vO lK05lpQWfXH5q8Sd4PiFfBJCjk789E+SBKwRLpkiwZusCWN6mmUV0arMVNCt5x2eR2ae6Y u27JmRxhTmLqMniJbLSEJB8WYX082gg= 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-118-aISY8DbDPDaJtNj-tgSo0Q-1; Sun, 28 Jun 2020 04:42:30 -0400 X-MC-Unique: aISY8DbDPDaJtNj-tgSo0Q-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 031AE8015CE; Sun, 28 Jun 2020 08:42:29 +0000 (UTC) Received: from lxbceph0.gsslab.pek2.redhat.com (vm37-55.gsslab.pek2.redhat.com [10.72.37.55]) by smtp.corp.redhat.com (Postfix) with ESMTP id DE1E096B62; Sun, 28 Jun 2020 08:42:26 +0000 (UTC) From: xiubli@redhat.com To: jlayton@kernel.org, idryomov@gmail.com Cc: zyan@redhat.com, pdonnell@redhat.com, ceph-devel@vger.kernel.org, Xiubo Li Subject: [PATCH v4 3/5] ceph: periodically send perf metrics to ceph Date: Sun, 28 Jun 2020 04:42:12 -0400 Message-Id: <1593333734-27480-4-git-send-email-xiubli@redhat.com> In-Reply-To: <1593333734-27480-1-git-send-email-xiubli@redhat.com> References: <1593333734-27480-1-git-send-email-xiubli@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Xiubo Li This will send the caps/read/write/metadata metrics to any available MDS only once per second as default, which will be the same as the userland client. It will skip the MDS sessions which don't support the metric collection, or the MDSs will close the socket connections directly when it get an unknown type message. We can disable the metric sending via the enable_send_metric module parameter. URL: https://tracker.ceph.com/issues/43215 Signed-off-by: Xiubo Li --- fs/ceph/mds_client.c | 29 +++++++++ fs/ceph/mds_client.h | 6 +- fs/ceph/metric.c | 142 +++++++++++++++++++++++++++++++++++++++++++ fs/ceph/metric.h | 75 +++++++++++++++++++++++ fs/ceph/super.c | 44 ++++++++++++++ fs/ceph/super.h | 2 + include/linux/ceph/ceph_fs.h | 1 + 7 files changed, 298 insertions(+), 1 deletion(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 2eeab10..18f43a4 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -754,6 +754,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, s->s_cap_iterator = NULL; INIT_LIST_HEAD(&s->s_cap_releases); INIT_WORK(&s->s_cap_release_work, ceph_cap_release_work); + INIT_DELAYED_WORK(&s->metric_delayed_work, ceph_metric_delayed_work); INIT_LIST_HEAD(&s->s_cap_dirty); INIT_LIST_HEAD(&s->s_cap_flushing); @@ -1801,6 +1802,20 @@ static int request_close_session(struct ceph_mds_client *mdsc, return 1; } +static void try_reset_metric_work(struct ceph_mds_client *mdsc, + struct ceph_mds_session *session) +{ + mutex_lock(&mdsc->mutex); + if (mdsc->metric.mds == session->s_mds) { + mdsc->metric.mds = -1; + cancel_delayed_work_sync(&session->metric_delayed_work); + + /* Choose a new session to run the metric work */ + ceph_choose_new_metric_session(mdsc); + } + mutex_unlock(&mdsc->mutex); +} + /* * Called with s_mutex held. */ @@ -1810,6 +1825,9 @@ static int __close_session(struct ceph_mds_client *mdsc, if (session->s_state >= CEPH_MDS_SESSION_CLOSING) return 0; session->s_state = CEPH_MDS_SESSION_CLOSING; + + try_reset_metric_work(mdsc, session); + return request_close_session(mdsc, session); } @@ -3312,6 +3330,15 @@ static void handle_session(struct ceph_mds_session *session, session->s_features = features; renewed_caps(mdsc, session, 0); wake = 1; + + mutex_lock(&mdsc->mutex); + if (mdsc->metric.mds < 0 && + test_bit(CEPHFS_FEATURE_METRIC_COLLECT, &session->s_features)) { + ceph_metric_schedule_delayed(session); + mdsc->metric.mds = session->s_mds; + } + mutex_unlock(&mdsc->mutex); + if (mdsc->stopping) __close_session(mdsc, session); break; @@ -3806,6 +3833,8 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, xa_destroy(&session->s_delegated_inos); + try_reset_metric_work(mdsc, session); + mutex_lock(&session->s_mutex); session->s_state = CEPH_MDS_SESSION_RECONNECTING; session->s_seq = 0; diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index bcb3892..daa905f 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -28,8 +28,9 @@ enum ceph_feature_type { CEPHFS_FEATURE_LAZY_CAP_WANTED, CEPHFS_FEATURE_MULTI_RECONNECT, CEPHFS_FEATURE_DELEG_INO, + CEPHFS_FEATURE_METRIC_COLLECT, - CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_DELEG_INO, + CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_METRIC_COLLECT, }; /* @@ -43,6 +44,7 @@ enum ceph_feature_type { CEPHFS_FEATURE_LAZY_CAP_WANTED, \ CEPHFS_FEATURE_MULTI_RECONNECT, \ CEPHFS_FEATURE_DELEG_INO, \ + CEPHFS_FEATURE_METRIC_COLLECT, \ \ CEPHFS_FEATURE_MAX, \ } @@ -212,6 +214,8 @@ struct ceph_mds_session { struct list_head s_waiting; /* waiting requests */ struct list_head s_unsafe; /* unsafe requests */ struct xarray s_delegated_inos; + + struct delayed_work metric_delayed_work; /* delayed work */ }; /* diff --git a/fs/ceph/metric.c b/fs/ceph/metric.c index 269eacb..47eba86 100644 --- a/fs/ceph/metric.c +++ b/fs/ceph/metric.c @@ -1,10 +1,150 @@ /* SPDX-License-Identifier: GPL-2.0 */ +#include #include #include #include #include "metric.h" +#include "mds_client.h" + +void ceph_metric_delayed_work(struct work_struct *work) +{ + struct ceph_mds_session *s = + container_of(work, struct ceph_mds_session, metric_delayed_work.work); + struct ceph_mds_client *mdsc = s->s_mdsc; + u64 nr_caps = atomic64_read(&mdsc->metric.total_caps); + struct ceph_metric_head *head; + struct ceph_metric_cap *cap; + struct ceph_metric_read_latency *read; + struct ceph_metric_write_latency *write; + struct ceph_metric_metadata_latency *meta; + struct ceph_client_metric *m = &mdsc->metric; + struct ceph_msg *msg; + struct timespec64 ts; + s64 sum, total; + s32 items = 0; + s32 len; + + len = sizeof(*head) + sizeof(*cap) + sizeof(*read) + sizeof(*write) + + sizeof(*meta); + + msg = ceph_msg_new(CEPH_MSG_CLIENT_METRICS, len, GFP_NOFS, true); + if (!msg) { + pr_err("send metrics to mds%d, failed to allocate message\n", + s->s_mds); + return; + } + + head = msg->front.iov_base; + + /* encode the cap metric */ + cap = (struct ceph_metric_cap *)(head + 1); + cap->type = cpu_to_le32(CLIENT_METRIC_TYPE_CAP_INFO); + cap->ver = 1; + cap->compat = 1; + cap->data_len = cpu_to_le32(sizeof(*cap) - 10); + cap->hit = cpu_to_le64(percpu_counter_sum(&mdsc->metric.i_caps_hit)); + cap->mis = cpu_to_le64(percpu_counter_sum(&mdsc->metric.i_caps_mis)); + cap->total = cpu_to_le64(nr_caps); + items++; + + /* encode the read latency metric */ + read = (struct ceph_metric_read_latency *)(cap + 1); + read->type = cpu_to_le32(CLIENT_METRIC_TYPE_READ_LATENCY); + read->ver = 1; + read->compat = 1; + read->data_len = cpu_to_le32(sizeof(*read) - 10); + total = m->total_reads; + sum = m->read_latency_sum; + jiffies_to_timespec64(sum, &ts); + read->sec = cpu_to_le32(ts.tv_sec); + read->nsec = cpu_to_le32(ts.tv_nsec); + items++; + + /* encode the write latency metric */ + write = (struct ceph_metric_write_latency *)(read + 1); + write->type = cpu_to_le32(CLIENT_METRIC_TYPE_WRITE_LATENCY); + write->ver = 1; + write->compat = 1; + write->data_len = cpu_to_le32(sizeof(*write) - 10); + total = m->total_writes; + sum = m->write_latency_sum; + jiffies_to_timespec64(sum, &ts); + write->sec = cpu_to_le32(ts.tv_sec); + write->nsec = cpu_to_le32(ts.tv_nsec); + items++; + + /* encode the metadata latency metric */ + meta = (struct ceph_metric_metadata_latency *)(write + 1); + meta->type = cpu_to_le32(CLIENT_METRIC_TYPE_METADATA_LATENCY); + meta->ver = 1; + meta->compat = 1; + meta->data_len = cpu_to_le32(sizeof(*meta) - 10); + total = m->total_metadatas; + sum = m->metadata_latency_sum; + jiffies_to_timespec64(sum, &ts); + meta->sec = cpu_to_le32(ts.tv_sec); + meta->nsec = cpu_to_le32(ts.tv_nsec); + items++; + + put_unaligned_le32(items, &head->num); + msg->front.iov_len = cpu_to_le32(len); + msg->hdr.version = cpu_to_le16(1); + msg->hdr.compat_version = cpu_to_le16(1); + msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); + dout("client%llu send metrics to mds%d\n", + ceph_client_gid(mdsc->fsc->client), s->s_mds); + ceph_con_send(&s->s_con, msg); + + ceph_metric_schedule_delayed(s); +} + +/* + * called under mdsc->mutex + */ +void ceph_choose_new_metric_session(struct ceph_mds_client *mdsc) +{ + struct ceph_mds_session *s; + int i; + + if (mdsc->stopping) + return; + + for (i = 0; i < mdsc->max_sessions; i++) { + s = __ceph_lookup_mds_session(mdsc, i); + if (!s) + continue; + + if (!check_session_state(mdsc, s)) { + ceph_put_mds_session(s); + continue; + } + + /* + * Skip it if MDS doesn't support the metric collection, + * or the MDS will close the session's socket connection + * directly when it get this message. + */ + if (test_bit(CEPHFS_FEATURE_METRIC_COLLECT, &s->s_features)) { + mdsc->metric.mds = i; + ceph_metric_schedule_delayed(s); + ceph_put_mds_session(s); + return; + } + + ceph_put_mds_session(s); + } +} + +void ceph_metric_schedule_delayed(struct ceph_mds_session *s) +{ + if (!enable_send_metrics) + return; + + /* per second */ + schedule_delayed_work(&s->metric_delayed_work, round_jiffies_relative(HZ)); +} int ceph_metric_init(struct ceph_client_metric *m) { @@ -52,6 +192,8 @@ int ceph_metric_init(struct ceph_client_metric *m) m->total_metadatas = 0; m->metadata_latency_sum = 0; + m->mds = -1; + return 0; err_i_caps_mis: diff --git a/fs/ceph/metric.h b/fs/ceph/metric.h index 23a3373..1a7e3fb 100644 --- a/fs/ceph/metric.h +++ b/fs/ceph/metric.h @@ -6,6 +6,74 @@ #include #include +struct ceph_mds_client; +struct ceph_mds_session; + +extern bool enable_send_metrics; + +enum ceph_metric_type { + CLIENT_METRIC_TYPE_CAP_INFO, + CLIENT_METRIC_TYPE_READ_LATENCY, + CLIENT_METRIC_TYPE_WRITE_LATENCY, + CLIENT_METRIC_TYPE_METADATA_LATENCY, + CLIENT_METRIC_TYPE_DENTRY_LEASE, + + CLIENT_METRIC_TYPE_MAX = CLIENT_METRIC_TYPE_DENTRY_LEASE, +}; + +/* metric caps header */ +struct ceph_metric_cap { + __le32 type; /* ceph metric type */ + + __u8 ver; + __u8 compat; + + __le32 data_len; /* length of sizeof(hit + mis + total) */ + __le64 hit; + __le64 mis; + __le64 total; +} __packed; + +/* metric read latency header */ +struct ceph_metric_read_latency { + __le32 type; /* ceph metric type */ + + __u8 ver; + __u8 compat; + + __le32 data_len; /* length of sizeof(sec + nsec) */ + __le32 sec; + __le32 nsec; +} __packed; + +/* metric write latency header */ +struct ceph_metric_write_latency { + __le32 type; /* ceph metric type */ + + __u8 ver; + __u8 compat; + + __le32 data_len; /* length of sizeof(sec + nsec) */ + __le32 sec; + __le32 nsec; +} __packed; + +/* metric metadata latency header */ +struct ceph_metric_metadata_latency { + __le32 type; /* ceph metric type */ + + __u8 ver; + __u8 compat; + + __le32 data_len; /* length of sizeof(sec + nsec) */ + __le32 sec; + __le32 nsec; +} __packed; + +struct ceph_metric_head { + __le32 num; /* the number of metrics that will be sent */ +} __packed; + /* This is the global metrics */ struct ceph_client_metric { atomic64_t total_dentries; @@ -36,8 +104,15 @@ struct ceph_client_metric { ktime_t metadata_latency_sq_sum; ktime_t metadata_latency_min; ktime_t metadata_latency_max; + + /* The MDS session running the metric work */ + int mds; }; +extern void ceph_metric_delayed_work(struct work_struct *work); +extern void ceph_metric_schedule_delayed(struct ceph_mds_session *s); +extern void ceph_choose_new_metric_session(struct ceph_mds_client *mdsc); + extern int ceph_metric_init(struct ceph_client_metric *m); extern void ceph_metric_destroy(struct ceph_client_metric *m); diff --git a/fs/ceph/super.c b/fs/ceph/super.c index c9784eb1..510ccb1 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -27,6 +27,9 @@ #include #include +static DEFINE_MUTEX(ceph_fsc_lock); +static LIST_HEAD(ceph_fsc_list); + /* * Ceph superblock operations * @@ -691,6 +694,10 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, if (!fsc->wb_pagevec_pool) goto fail_cap_wq; + mutex_lock(&ceph_fsc_lock); + list_add_tail(&fsc->list, &ceph_fsc_list); + mutex_unlock(&ceph_fsc_lock); + return fsc; fail_cap_wq: @@ -717,6 +724,10 @@ static void destroy_fs_client(struct ceph_fs_client *fsc) { dout("destroy_fs_client %p\n", fsc); + mutex_lock(&ceph_fsc_lock); + list_del(&fsc->list); + mutex_unlock(&ceph_fsc_lock); + ceph_mdsc_destroy(fsc); destroy_workqueue(fsc->inode_wq); destroy_workqueue(fsc->cap_wq); @@ -1282,6 +1293,39 @@ static void __exit exit_ceph(void) destroy_caches(); } +static int param_set_metrics(const char *val, const struct kernel_param *kp) +{ + struct ceph_fs_client *fsc; + int ret; + + ret = param_set_bool(val, kp); + if (ret) { + pr_err("Failed to parse sending metrics switch value '%s'\n", + val); + return ret; + } else if (enable_send_metrics) { + // wake up all the mds clients + mutex_lock(&ceph_fsc_lock); + list_for_each_entry(fsc, &ceph_fsc_list, list) { + mutex_lock(&fsc->mdsc->mutex); + ceph_choose_new_metric_session(fsc->mdsc); + mutex_unlock(&fsc->mdsc->mutex); + } + mutex_unlock(&ceph_fsc_lock); + } + + return 0; +} + +static const struct kernel_param_ops param_ops_metrics = { + .set = param_set_metrics, + .get = param_get_bool, +}; + +bool enable_send_metrics = true; +module_param_cb(enable_send_metrics, ¶m_ops_metrics, &enable_send_metrics, 0644); +MODULE_PARM_DESC(enable_send_metrics, "Enable sending perf metrics to ceph cluster (default: on)"); + module_init(init_ceph); module_exit(exit_ceph); diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 5a6cdd3..05edc9a 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -101,6 +101,8 @@ struct ceph_mount_options { struct ceph_fs_client { struct super_block *sb; + struct list_head list; + struct ceph_mount_options *mount_options; struct ceph_client *client; diff --git a/include/linux/ceph/ceph_fs.h b/include/linux/ceph/ceph_fs.h index ebf5ba6..455e9b9 100644 --- a/include/linux/ceph/ceph_fs.h +++ b/include/linux/ceph/ceph_fs.h @@ -130,6 +130,7 @@ struct ceph_dir_layout { #define CEPH_MSG_CLIENT_REQUEST 24 #define CEPH_MSG_CLIENT_REQUEST_FORWARD 25 #define CEPH_MSG_CLIENT_REPLY 26 +#define CEPH_MSG_CLIENT_METRICS 29 #define CEPH_MSG_CLIENT_CAPS 0x310 #define CEPH_MSG_CLIENT_LEASE 0x311 #define CEPH_MSG_CLIENT_SNAP 0x312