1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
8 #include <rte_common.h>
9 #include <rte_string_fns.h>
10 #include <rte_malloc.h>
11 #include <rte_metrics.h>
12 #include <rte_lcore.h>
13 #include <rte_memzone.h>
14 #include <rte_spinlock.h>
16 #define RTE_METRICS_MEMZONE_NAME "RTE_METRICS"
19 * Internal stats metadata and value entry.
23 struct rte_metrics_meta_s {
25 char name[RTE_METRICS_MAX_NAME_LEN];
26 /** Current value for metric */
27 uint64_t value[RTE_MAX_ETHPORTS];
28 /** Used for global metrics */
29 uint64_t global_value;
30 /** Index of next root element (zero for none) */
31 uint16_t idx_next_set;
32 /** Index of next metric in set (zero for none) */
33 uint16_t idx_next_stat;
37 * Internal stats info structure.
40 * Offsets into metadata are used instead of pointers because ASLR
41 * means that having the same physical addresses in different
42 * processes is not guaranteed.
44 struct rte_metrics_data_s {
45 /** Index of last metadata entry with valid data.
46 * This value is not valid if cnt_stats is zero.
48 uint16_t idx_last_set;
49 /** Number of metrics. */
51 /** Metric data memory block. */
52 struct rte_metrics_meta_s metadata[RTE_METRICS_MAX_METRICS];
53 /** Metric data access lock */
58 rte_metrics_init(int socket_id)
60 struct rte_metrics_data_s *stats;
61 const struct rte_memzone *memzone;
63 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
66 memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
69 memzone = rte_memzone_reserve(RTE_METRICS_MEMZONE_NAME,
70 sizeof(struct rte_metrics_data_s), socket_id, 0);
72 rte_exit(EXIT_FAILURE, "Unable to allocate stats memzone\n");
73 stats = memzone->addr;
74 memset(stats, 0, sizeof(struct rte_metrics_data_s));
75 rte_spinlock_init(&stats->lock);
79 rte_metrics_deinit(void)
81 struct rte_metrics_data_s *stats;
82 const struct rte_memzone *memzone;
84 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
87 memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
91 stats = memzone->addr;
92 memset(stats, 0, sizeof(struct rte_metrics_data_s));
94 return rte_memzone_free(memzone);
99 rte_metrics_reg_name(const char *name)
101 const char * const list_names[] = {name};
103 return rte_metrics_reg_names(list_names, 1);
107 rte_metrics_reg_names(const char * const *names, uint16_t cnt_names)
109 struct rte_metrics_meta_s *entry = NULL;
110 struct rte_metrics_data_s *stats;
111 const struct rte_memzone *memzone;
115 /* Some sanity checks */
116 if (cnt_names < 1 || names == NULL)
118 for (idx_name = 0; idx_name < cnt_names; idx_name++)
119 if (names[idx_name] == NULL)
122 memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
125 stats = memzone->addr;
127 if (stats->cnt_stats + cnt_names >= RTE_METRICS_MAX_METRICS)
130 rte_spinlock_lock(&stats->lock);
132 /* Overwritten later if this is actually first set.. */
133 stats->metadata[stats->idx_last_set].idx_next_set = stats->cnt_stats;
135 stats->idx_last_set = idx_base = stats->cnt_stats;
137 for (idx_name = 0; idx_name < cnt_names; idx_name++) {
138 entry = &stats->metadata[idx_name + stats->cnt_stats];
139 strlcpy(entry->name, names[idx_name], RTE_METRICS_MAX_NAME_LEN);
140 memset(entry->value, 0, sizeof(entry->value));
141 entry->idx_next_stat = idx_name + stats->cnt_stats + 1;
143 entry->idx_next_stat = 0;
144 entry->idx_next_set = 0;
145 stats->cnt_stats += cnt_names;
147 rte_spinlock_unlock(&stats->lock);
153 rte_metrics_update_value(int port_id, uint16_t key, const uint64_t value)
155 return rte_metrics_update_values(port_id, key, &value, 1);
159 rte_metrics_update_values(int port_id,
161 const uint64_t *values,
164 struct rte_metrics_meta_s *entry;
165 struct rte_metrics_data_s *stats;
166 const struct rte_memzone *memzone;
169 uint16_t cnt_setsize;
171 if (port_id != RTE_METRICS_GLOBAL &&
172 (port_id < 0 || port_id >= RTE_MAX_ETHPORTS))
178 memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
181 stats = memzone->addr;
183 rte_spinlock_lock(&stats->lock);
185 if (key >= stats->cnt_stats) {
186 rte_spinlock_unlock(&stats->lock);
191 while (idx_metric < stats->cnt_stats) {
192 entry = &stats->metadata[idx_metric];
193 if (entry->idx_next_stat == 0)
198 /* Check update does not cross set border */
199 if (count > cnt_setsize) {
200 rte_spinlock_unlock(&stats->lock);
204 if (port_id == RTE_METRICS_GLOBAL)
205 for (idx_value = 0; idx_value < count; idx_value++) {
206 idx_metric = key + idx_value;
207 stats->metadata[idx_metric].global_value =
211 for (idx_value = 0; idx_value < count; idx_value++) {
212 idx_metric = key + idx_value;
213 stats->metadata[idx_metric].value[port_id] =
216 rte_spinlock_unlock(&stats->lock);
221 rte_metrics_get_names(struct rte_metric_name *names,
224 struct rte_metrics_data_s *stats;
225 const struct rte_memzone *memzone;
229 memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
233 stats = memzone->addr;
234 rte_spinlock_lock(&stats->lock);
236 if (capacity < stats->cnt_stats) {
237 return_value = stats->cnt_stats;
238 rte_spinlock_unlock(&stats->lock);
241 for (idx_name = 0; idx_name < stats->cnt_stats; idx_name++)
242 strlcpy(names[idx_name].name,
243 stats->metadata[idx_name].name,
244 RTE_METRICS_MAX_NAME_LEN);
246 return_value = stats->cnt_stats;
247 rte_spinlock_unlock(&stats->lock);
252 rte_metrics_get_values(int port_id,
253 struct rte_metric_value *values,
256 struct rte_metrics_meta_s *entry;
257 struct rte_metrics_data_s *stats;
258 const struct rte_memzone *memzone;
262 if (port_id != RTE_METRICS_GLOBAL &&
263 (port_id < 0 || port_id >= RTE_MAX_ETHPORTS))
266 memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
270 stats = memzone->addr;
271 rte_spinlock_lock(&stats->lock);
273 if (values != NULL) {
274 if (capacity < stats->cnt_stats) {
275 return_value = stats->cnt_stats;
276 rte_spinlock_unlock(&stats->lock);
279 if (port_id == RTE_METRICS_GLOBAL)
281 idx_name < stats->cnt_stats;
283 entry = &stats->metadata[idx_name];
284 values[idx_name].key = idx_name;
285 values[idx_name].value = entry->global_value;
289 idx_name < stats->cnt_stats;
291 entry = &stats->metadata[idx_name];
292 values[idx_name].key = idx_name;
293 values[idx_name].value = entry->value[port_id];
296 return_value = stats->cnt_stats;
297 rte_spinlock_unlock(&stats->lock);