354 lines
10 KiB
C
354 lines
10 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/ceph/ceph_debug.h>
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#include <linux/types.h>
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#include <linux/percpu_counter.h>
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#include <linux/math64.h>
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#include "metric.h"
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#include "mds_client.h"
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static void ktime_to_ceph_timespec(struct ceph_timespec *ts, ktime_t val)
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{
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struct timespec64 t = ktime_to_timespec64(val);
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ceph_encode_timespec64(ts, &t);
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}
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static bool ceph_mdsc_send_metrics(struct ceph_mds_client *mdsc,
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struct ceph_mds_session *s)
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{
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struct ceph_metric_head *head;
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struct ceph_metric_cap *cap;
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struct ceph_metric_read_latency *read;
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struct ceph_metric_write_latency *write;
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struct ceph_metric_metadata_latency *meta;
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struct ceph_metric_dlease *dlease;
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struct ceph_opened_files *files;
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struct ceph_pinned_icaps *icaps;
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struct ceph_opened_inodes *inodes;
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struct ceph_read_io_size *rsize;
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struct ceph_write_io_size *wsize;
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struct ceph_client_metric *m = &mdsc->metric;
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u64 nr_caps = atomic64_read(&m->total_caps);
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u32 header_len = sizeof(struct ceph_metric_header);
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struct ceph_msg *msg;
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s64 sum;
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s32 items = 0;
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s32 len;
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len = sizeof(*head) + sizeof(*cap) + sizeof(*read) + sizeof(*write)
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+ sizeof(*meta) + sizeof(*dlease) + sizeof(*files)
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+ sizeof(*icaps) + sizeof(*inodes) + sizeof(*rsize)
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+ sizeof(*wsize);
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msg = ceph_msg_new(CEPH_MSG_CLIENT_METRICS, len, GFP_NOFS, true);
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if (!msg) {
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pr_err("send metrics to mds%d, failed to allocate message\n",
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s->s_mds);
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return false;
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}
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head = msg->front.iov_base;
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/* encode the cap metric */
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cap = (struct ceph_metric_cap *)(head + 1);
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cap->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_CAP_INFO);
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cap->header.ver = 1;
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cap->header.compat = 1;
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cap->header.data_len = cpu_to_le32(sizeof(*cap) - header_len);
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cap->hit = cpu_to_le64(percpu_counter_sum(&m->i_caps_hit));
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cap->mis = cpu_to_le64(percpu_counter_sum(&m->i_caps_mis));
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cap->total = cpu_to_le64(nr_caps);
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items++;
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/* encode the read latency metric */
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read = (struct ceph_metric_read_latency *)(cap + 1);
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read->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_READ_LATENCY);
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read->header.ver = 2;
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read->header.compat = 1;
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read->header.data_len = cpu_to_le32(sizeof(*read) - header_len);
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sum = m->metric[METRIC_READ].latency_sum;
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ktime_to_ceph_timespec(&read->lat, sum);
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ktime_to_ceph_timespec(&read->avg, m->metric[METRIC_READ].latency_avg);
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read->sq_sum = cpu_to_le64(m->metric[METRIC_READ].latency_sq_sum);
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read->count = cpu_to_le64(m->metric[METRIC_READ].total);
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items++;
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/* encode the write latency metric */
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write = (struct ceph_metric_write_latency *)(read + 1);
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write->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_WRITE_LATENCY);
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write->header.ver = 2;
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write->header.compat = 1;
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write->header.data_len = cpu_to_le32(sizeof(*write) - header_len);
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sum = m->metric[METRIC_WRITE].latency_sum;
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ktime_to_ceph_timespec(&write->lat, sum);
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ktime_to_ceph_timespec(&write->avg, m->metric[METRIC_WRITE].latency_avg);
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write->sq_sum = cpu_to_le64(m->metric[METRIC_WRITE].latency_sq_sum);
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write->count = cpu_to_le64(m->metric[METRIC_WRITE].total);
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items++;
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/* encode the metadata latency metric */
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meta = (struct ceph_metric_metadata_latency *)(write + 1);
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meta->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_METADATA_LATENCY);
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meta->header.ver = 2;
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meta->header.compat = 1;
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meta->header.data_len = cpu_to_le32(sizeof(*meta) - header_len);
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sum = m->metric[METRIC_METADATA].latency_sum;
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ktime_to_ceph_timespec(&meta->lat, sum);
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ktime_to_ceph_timespec(&meta->avg, m->metric[METRIC_METADATA].latency_avg);
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meta->sq_sum = cpu_to_le64(m->metric[METRIC_METADATA].latency_sq_sum);
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meta->count = cpu_to_le64(m->metric[METRIC_METADATA].total);
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items++;
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/* encode the dentry lease metric */
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dlease = (struct ceph_metric_dlease *)(meta + 1);
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dlease->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_DENTRY_LEASE);
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dlease->header.ver = 1;
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dlease->header.compat = 1;
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dlease->header.data_len = cpu_to_le32(sizeof(*dlease) - header_len);
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dlease->hit = cpu_to_le64(percpu_counter_sum(&m->d_lease_hit));
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dlease->mis = cpu_to_le64(percpu_counter_sum(&m->d_lease_mis));
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dlease->total = cpu_to_le64(atomic64_read(&m->total_dentries));
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items++;
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sum = percpu_counter_sum(&m->total_inodes);
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/* encode the opened files metric */
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files = (struct ceph_opened_files *)(dlease + 1);
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files->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_OPENED_FILES);
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files->header.ver = 1;
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files->header.compat = 1;
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files->header.data_len = cpu_to_le32(sizeof(*files) - header_len);
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files->opened_files = cpu_to_le64(atomic64_read(&m->opened_files));
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files->total = cpu_to_le64(sum);
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items++;
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/* encode the pinned icaps metric */
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icaps = (struct ceph_pinned_icaps *)(files + 1);
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icaps->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_PINNED_ICAPS);
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icaps->header.ver = 1;
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icaps->header.compat = 1;
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icaps->header.data_len = cpu_to_le32(sizeof(*icaps) - header_len);
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icaps->pinned_icaps = cpu_to_le64(nr_caps);
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icaps->total = cpu_to_le64(sum);
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items++;
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/* encode the opened inodes metric */
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inodes = (struct ceph_opened_inodes *)(icaps + 1);
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inodes->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_OPENED_INODES);
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inodes->header.ver = 1;
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inodes->header.compat = 1;
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inodes->header.data_len = cpu_to_le32(sizeof(*inodes) - header_len);
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inodes->opened_inodes = cpu_to_le64(percpu_counter_sum(&m->opened_inodes));
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inodes->total = cpu_to_le64(sum);
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items++;
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/* encode the read io size metric */
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rsize = (struct ceph_read_io_size *)(inodes + 1);
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rsize->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_READ_IO_SIZES);
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rsize->header.ver = 1;
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rsize->header.compat = 1;
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rsize->header.data_len = cpu_to_le32(sizeof(*rsize) - header_len);
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rsize->total_ops = cpu_to_le64(m->metric[METRIC_READ].total);
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rsize->total_size = cpu_to_le64(m->metric[METRIC_READ].size_sum);
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items++;
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/* encode the write io size metric */
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wsize = (struct ceph_write_io_size *)(rsize + 1);
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wsize->header.type = cpu_to_le32(CLIENT_METRIC_TYPE_WRITE_IO_SIZES);
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wsize->header.ver = 1;
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wsize->header.compat = 1;
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wsize->header.data_len = cpu_to_le32(sizeof(*wsize) - header_len);
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wsize->total_ops = cpu_to_le64(m->metric[METRIC_WRITE].total);
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wsize->total_size = cpu_to_le64(m->metric[METRIC_WRITE].size_sum);
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items++;
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put_unaligned_le32(items, &head->num);
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msg->front.iov_len = len;
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msg->hdr.version = cpu_to_le16(1);
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msg->hdr.compat_version = cpu_to_le16(1);
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msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
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ceph_con_send(&s->s_con, msg);
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return true;
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}
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static void metric_get_session(struct ceph_mds_client *mdsc)
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{
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struct ceph_mds_session *s;
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int i;
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mutex_lock(&mdsc->mutex);
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for (i = 0; i < mdsc->max_sessions; i++) {
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s = __ceph_lookup_mds_session(mdsc, i);
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if (!s)
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continue;
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/*
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* Skip it if MDS doesn't support the metric collection,
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* or the MDS will close the session's socket connection
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* directly when it get this message.
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*/
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if (check_session_state(s) &&
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test_bit(CEPHFS_FEATURE_METRIC_COLLECT, &s->s_features)) {
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mdsc->metric.session = s;
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break;
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}
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ceph_put_mds_session(s);
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}
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mutex_unlock(&mdsc->mutex);
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}
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static void metric_delayed_work(struct work_struct *work)
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{
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struct ceph_client_metric *m =
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container_of(work, struct ceph_client_metric, delayed_work.work);
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struct ceph_mds_client *mdsc =
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container_of(m, struct ceph_mds_client, metric);
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if (mdsc->stopping)
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return;
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if (!m->session || !check_session_state(m->session)) {
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if (m->session) {
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ceph_put_mds_session(m->session);
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m->session = NULL;
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}
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metric_get_session(mdsc);
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}
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if (m->session) {
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ceph_mdsc_send_metrics(mdsc, m->session);
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metric_schedule_delayed(m);
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}
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}
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int ceph_metric_init(struct ceph_client_metric *m)
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{
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struct ceph_metric *metric;
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int ret, i;
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if (!m)
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return -EINVAL;
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atomic64_set(&m->total_dentries, 0);
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ret = percpu_counter_init(&m->d_lease_hit, 0, GFP_KERNEL);
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if (ret)
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return ret;
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ret = percpu_counter_init(&m->d_lease_mis, 0, GFP_KERNEL);
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if (ret)
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goto err_d_lease_mis;
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atomic64_set(&m->total_caps, 0);
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ret = percpu_counter_init(&m->i_caps_hit, 0, GFP_KERNEL);
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if (ret)
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goto err_i_caps_hit;
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ret = percpu_counter_init(&m->i_caps_mis, 0, GFP_KERNEL);
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if (ret)
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goto err_i_caps_mis;
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for (i = 0; i < METRIC_MAX; i++) {
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metric = &m->metric[i];
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spin_lock_init(&metric->lock);
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metric->size_sum = 0;
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metric->size_min = U64_MAX;
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metric->size_max = 0;
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metric->total = 0;
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metric->latency_sum = 0;
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metric->latency_avg = 0;
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metric->latency_sq_sum = 0;
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metric->latency_min = KTIME_MAX;
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metric->latency_max = 0;
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}
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atomic64_set(&m->opened_files, 0);
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ret = percpu_counter_init(&m->opened_inodes, 0, GFP_KERNEL);
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if (ret)
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goto err_opened_inodes;
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ret = percpu_counter_init(&m->total_inodes, 0, GFP_KERNEL);
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if (ret)
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goto err_total_inodes;
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m->session = NULL;
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INIT_DELAYED_WORK(&m->delayed_work, metric_delayed_work);
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return 0;
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err_total_inodes:
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percpu_counter_destroy(&m->opened_inodes);
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err_opened_inodes:
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percpu_counter_destroy(&m->i_caps_mis);
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err_i_caps_mis:
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percpu_counter_destroy(&m->i_caps_hit);
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err_i_caps_hit:
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percpu_counter_destroy(&m->d_lease_mis);
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err_d_lease_mis:
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percpu_counter_destroy(&m->d_lease_hit);
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return ret;
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}
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void ceph_metric_destroy(struct ceph_client_metric *m)
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{
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if (!m)
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return;
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cancel_delayed_work_sync(&m->delayed_work);
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percpu_counter_destroy(&m->total_inodes);
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percpu_counter_destroy(&m->opened_inodes);
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percpu_counter_destroy(&m->i_caps_mis);
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percpu_counter_destroy(&m->i_caps_hit);
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percpu_counter_destroy(&m->d_lease_mis);
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percpu_counter_destroy(&m->d_lease_hit);
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ceph_put_mds_session(m->session);
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}
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#define METRIC_UPDATE_MIN_MAX(min, max, new) \
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{ \
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if (unlikely(new < min)) \
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min = new; \
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if (unlikely(new > max)) \
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max = new; \
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}
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static inline void __update_mean_and_stdev(ktime_t total, ktime_t *lavg,
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ktime_t *sq_sump, ktime_t lat)
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{
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ktime_t avg;
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if (unlikely(total == 1)) {
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*lavg = lat;
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} else {
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/* the sq is (lat - old_avg) * (lat - new_avg) */
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avg = *lavg + div64_s64(lat - *lavg, total);
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*sq_sump += (lat - *lavg)*(lat - avg);
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*lavg = avg;
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}
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}
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||
|
|
void ceph_update_metrics(struct ceph_metric *m,
|
||
|
|
ktime_t r_start, ktime_t r_end,
|
||
|
|
unsigned int size, int rc)
|
||
|
|
{
|
||
|
|
ktime_t lat = ktime_sub(r_end, r_start);
|
||
|
|
ktime_t total;
|
||
|
|
|
||
|
|
if (unlikely(rc < 0 && rc != -ENOENT && rc != -ETIMEDOUT))
|
||
|
|
return;
|
||
|
|
|
||
|
|
spin_lock(&m->lock);
|
||
|
|
total = ++m->total;
|
||
|
|
m->size_sum += size;
|
||
|
|
METRIC_UPDATE_MIN_MAX(m->size_min, m->size_max, size);
|
||
|
|
m->latency_sum += lat;
|
||
|
|
METRIC_UPDATE_MIN_MAX(m->latency_min, m->latency_max, lat);
|
||
|
|
__update_mean_and_stdev(total, &m->latency_avg, &m->latency_sq_sum,
|
||
|
|
lat);
|
||
|
|
spin_unlock(&m->lock);
|
||
|
|
}
|