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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | /* SPDX-License-Identifier: GPL-2.0 */ #include <linux/types.h> #include <linux/percpu_counter.h> #include <linux/math64.h> #include "metric.h" int ceph_metric_init(struct ceph_client_metric *m) { int ret; if (!m) return -EINVAL; atomic64_set(&m->total_dentries, 0); ret = percpu_counter_init(&m->d_lease_hit, 0, GFP_KERNEL); if (ret) return ret; ret = percpu_counter_init(&m->d_lease_mis, 0, GFP_KERNEL); if (ret) goto err_d_lease_mis; ret = percpu_counter_init(&m->i_caps_hit, 0, GFP_KERNEL); if (ret) goto err_i_caps_hit; ret = percpu_counter_init(&m->i_caps_mis, 0, GFP_KERNEL); if (ret) goto err_i_caps_mis; spin_lock_init(&m->read_latency_lock); m->read_latency_sq_sum = 0; m->read_latency_min = KTIME_MAX; m->read_latency_max = 0; m->total_reads = 0; m->read_latency_sum = 0; spin_lock_init(&m->write_latency_lock); m->write_latency_sq_sum = 0; m->write_latency_min = KTIME_MAX; m->write_latency_max = 0; m->total_writes = 0; m->write_latency_sum = 0; spin_lock_init(&m->metadata_latency_lock); m->metadata_latency_sq_sum = 0; m->metadata_latency_min = KTIME_MAX; m->metadata_latency_max = 0; m->total_metadatas = 0; m->metadata_latency_sum = 0; return 0; err_i_caps_mis: percpu_counter_destroy(&m->i_caps_hit); err_i_caps_hit: percpu_counter_destroy(&m->d_lease_mis); err_d_lease_mis: percpu_counter_destroy(&m->d_lease_hit); return ret; } void ceph_metric_destroy(struct ceph_client_metric *m) { if (!m) return; percpu_counter_destroy(&m->i_caps_mis); percpu_counter_destroy(&m->i_caps_hit); percpu_counter_destroy(&m->d_lease_mis); percpu_counter_destroy(&m->d_lease_hit); } static inline void __update_latency(ktime_t *totalp, ktime_t *lsump, ktime_t *min, ktime_t *max, ktime_t *sq_sump, ktime_t lat) { ktime_t total, avg, sq, lsum; total = ++(*totalp); lsum = (*lsump += lat); if (unlikely(lat < *min)) *min = lat; if (unlikely(lat > *max)) *max = lat; if (unlikely(total == 1)) return; /* the sq is (lat - old_avg) * (lat - new_avg) */ avg = DIV64_U64_ROUND_CLOSEST((lsum - lat), (total - 1)); sq = lat - avg; avg = DIV64_U64_ROUND_CLOSEST(lsum, total); sq = sq * (lat - avg); *sq_sump += sq; } void ceph_update_read_latency(struct ceph_client_metric *m, ktime_t r_start, ktime_t r_end, int rc) { ktime_t lat = ktime_sub(r_end, r_start); if (unlikely(rc < 0 && rc != -ENOENT && rc != -ETIMEDOUT)) return; spin_lock(&m->read_latency_lock); __update_latency(&m->total_reads, &m->read_latency_sum, &m->read_latency_min, &m->read_latency_max, &m->read_latency_sq_sum, lat); spin_unlock(&m->read_latency_lock); } void ceph_update_write_latency(struct ceph_client_metric *m, ktime_t r_start, ktime_t r_end, int rc) { ktime_t lat = ktime_sub(r_end, r_start); if (unlikely(rc && rc != -ETIMEDOUT)) return; spin_lock(&m->write_latency_lock); __update_latency(&m->total_writes, &m->write_latency_sum, &m->write_latency_min, &m->write_latency_max, &m->write_latency_sq_sum, lat); spin_unlock(&m->write_latency_lock); } void ceph_update_metadata_latency(struct ceph_client_metric *m, ktime_t r_start, ktime_t r_end, int rc) { ktime_t lat = ktime_sub(r_end, r_start); if (unlikely(rc && rc != -ENOENT)) return; spin_lock(&m->metadata_latency_lock); __update_latency(&m->total_metadatas, &m->metadata_latency_sum, &m->metadata_latency_min, &m->metadata_latency_max, &m->metadata_latency_sq_sum, lat); spin_unlock(&m->metadata_latency_lock); } |