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Send metric flags to the MDS, indicating what metrics the client supports. Currently that consists of cap statistics, and read, write and metadata latencies. URL: https://tracker.ceph.com/issues/43435 Signed-off-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
153 lines
3.6 KiB
C
153 lines
3.6 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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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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