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1dd8d47081
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.
[ jlayton: drop unrelated hunk, count hashed inodes instead of
allocated ones ]
URL: https://tracker.ceph.com/issues/47005
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FS_CEPH_MDS_METRIC_H
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#define _FS_CEPH_MDS_METRIC_H
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#include <linux/types.h>
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#include <linux/percpu_counter.h>
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#include <linux/ktime.h>
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extern bool disable_send_metrics;
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enum ceph_metric_type {
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CLIENT_METRIC_TYPE_CAP_INFO,
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CLIENT_METRIC_TYPE_READ_LATENCY,
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CLIENT_METRIC_TYPE_WRITE_LATENCY,
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CLIENT_METRIC_TYPE_METADATA_LATENCY,
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CLIENT_METRIC_TYPE_DENTRY_LEASE,
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CLIENT_METRIC_TYPE_MAX = CLIENT_METRIC_TYPE_DENTRY_LEASE,
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};
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/*
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* This will always have the highest metric bit value
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* as the last element of the array.
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*/
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#define CEPHFS_METRIC_SPEC_CLIENT_SUPPORTED { \
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CLIENT_METRIC_TYPE_CAP_INFO, \
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CLIENT_METRIC_TYPE_READ_LATENCY, \
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CLIENT_METRIC_TYPE_WRITE_LATENCY, \
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CLIENT_METRIC_TYPE_METADATA_LATENCY, \
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\
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CLIENT_METRIC_TYPE_MAX, \
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}
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/* metric caps header */
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struct ceph_metric_cap {
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__le32 type; /* ceph metric type */
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__u8 ver;
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__u8 compat;
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__le32 data_len; /* length of sizeof(hit + mis + total) */
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__le64 hit;
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__le64 mis;
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__le64 total;
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} __packed;
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/* metric read latency header */
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struct ceph_metric_read_latency {
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__le32 type; /* ceph metric type */
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__u8 ver;
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__u8 compat;
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__le32 data_len; /* length of sizeof(sec + nsec) */
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__le32 sec;
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__le32 nsec;
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} __packed;
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/* metric write latency header */
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struct ceph_metric_write_latency {
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__le32 type; /* ceph metric type */
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__u8 ver;
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__u8 compat;
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__le32 data_len; /* length of sizeof(sec + nsec) */
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__le32 sec;
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__le32 nsec;
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} __packed;
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/* metric metadata latency header */
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struct ceph_metric_metadata_latency {
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__le32 type; /* ceph metric type */
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__u8 ver;
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__u8 compat;
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__le32 data_len; /* length of sizeof(sec + nsec) */
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__le32 sec;
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__le32 nsec;
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} __packed;
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struct ceph_metric_head {
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__le32 num; /* the number of metrics that will be sent */
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} __packed;
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/* This is the global metrics */
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struct ceph_client_metric {
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atomic64_t total_dentries;
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struct percpu_counter d_lease_hit;
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struct percpu_counter d_lease_mis;
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atomic64_t total_caps;
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struct percpu_counter i_caps_hit;
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struct percpu_counter i_caps_mis;
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spinlock_t read_latency_lock;
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u64 total_reads;
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ktime_t read_latency_sum;
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ktime_t read_latency_sq_sum;
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ktime_t read_latency_min;
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ktime_t read_latency_max;
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spinlock_t write_latency_lock;
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u64 total_writes;
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ktime_t write_latency_sum;
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ktime_t write_latency_sq_sum;
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ktime_t write_latency_min;
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ktime_t write_latency_max;
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spinlock_t metadata_latency_lock;
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u64 total_metadatas;
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ktime_t metadata_latency_sum;
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ktime_t metadata_latency_sq_sum;
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ktime_t metadata_latency_min;
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ktime_t metadata_latency_max;
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/* The total number of directories and files that are opened */
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atomic64_t opened_files;
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/* The total number of inodes that have opened files or directories */
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struct percpu_counter opened_inodes;
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struct percpu_counter total_inodes;
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struct ceph_mds_session *session;
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struct delayed_work delayed_work; /* delayed work */
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};
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static inline void metric_schedule_delayed(struct ceph_client_metric *m)
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{
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if (disable_send_metrics)
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return;
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/* per second */
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schedule_delayed_work(&m->delayed_work, round_jiffies_relative(HZ));
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}
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extern int ceph_metric_init(struct ceph_client_metric *m);
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extern void ceph_metric_destroy(struct ceph_client_metric *m);
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static inline void ceph_update_cap_hit(struct ceph_client_metric *m)
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{
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percpu_counter_inc(&m->i_caps_hit);
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}
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static inline void ceph_update_cap_mis(struct ceph_client_metric *m)
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{
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percpu_counter_inc(&m->i_caps_mis);
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}
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extern void ceph_update_read_latency(struct ceph_client_metric *m,
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ktime_t r_start, ktime_t r_end,
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int rc);
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extern void ceph_update_write_latency(struct ceph_client_metric *m,
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ktime_t r_start, ktime_t r_end,
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int rc);
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extern void ceph_update_metadata_latency(struct ceph_client_metric *m,
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ktime_t r_start, ktime_t r_end,
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int rc);
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#endif /* _FS_CEPH_MDS_METRIC_H */
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