1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2018 Intel Corporation
5 #ifndef _RTE_EMPTY_POLL_H
6 #define _RTE_EMPTY_POLL_H
10 * RTE Power Management
15 #include <rte_common.h>
16 #include <rte_byteorder.h>
18 #include <rte_string_fns.h>
19 #include <rte_power.h>
20 #include <rte_timer.h>
26 #define NUM_FREQS RTE_MAX_LCORE_FREQS
28 #define BINS_AV 4 /* Has to be ^2 */
30 #define DROP (NUM_DIRECTIONS * NUM_DEVICES)
32 #define NUM_PRIORITIES 2
34 #define NUM_NODES 256 /* Max core number*/
36 /* Processor Power State */
45 /* Queue Polling State */
47 TRAINING, /* NO TRAFFIC */
54 struct freq_threshold {
58 uint32_t threshold_percent;
59 uint32_t cur_train_iter;
62 /* Each Worker Thread Empty Poll Stats */
63 struct priority_worker {
65 /* Current dequeue and throughput counts */
66 /* These 2 are written to by the worker threads */
67 /* So keep them on their own cache line */
68 uint64_t empty_dequeues;
69 uint64_t num_dequeue_pkts;
71 enum queue_state queue_state;
73 uint64_t empty_dequeues_prev;
74 uint64_t num_dequeue_pkts_prev;
76 /* Used for training only */
77 struct freq_threshold thresh[NUM_FREQ];
78 enum freq_val cur_freq;
80 /* bucket arrays to calculate the averages */
81 /* edpi mean empty poll counter difference per interval */
82 uint64_t edpi_av[BINS_AV];
83 /* empty poll counter */
85 /* ppi mean valid poll counter per interval */
86 uint64_t ppi_av[BINS_AV];
87 /* valid poll counter */
91 uint32_t iter_counter;
92 uint32_t threshold_ctr;
96 } __rte_cache_aligned;
101 struct priority_worker wrk_stats[NUM_NODES];
103 /* flag to stop rx threads processing packets until training over */
108 /* Empty Poll Parameters */
111 /* Timer related stuff */
112 uint64_t interval_ticks;
113 uint32_t max_train_iter;
115 struct rte_timer timer0;
116 struct stats_data wrk_data;
120 /* Sample App Init information */
123 uint64_t med_base_edpi;
124 uint64_t hgh_base_edpi;
126 enum queue_state state;
132 * Initialize the power management system.
135 * the structure of empty poll configuration
137 * the power state/frequency mapping table
139 * the initialization policy from sample app
143 * - Negative on error.
147 rte_power_empty_poll_stat_init(struct ep_params **eptr, uint8_t *freq_tlb,
148 struct ep_policy *policy);
151 * Free the resource hold by power management system.
155 rte_power_empty_poll_stat_free(void);
158 * Update specific core empty poll counter
159 * It's not thread safe.
166 * - Negative on error.
170 rte_power_empty_poll_stat_update(unsigned int lcore_id);
173 * Update specific core valid poll counter, not thread safe.
178 * The packet number of one valid poll.
182 * - Negative on error.
186 rte_power_poll_stat_update(unsigned int lcore_id, uint8_t nb_pkt);
189 * Fetch specific core empty poll counter.
195 * Current lcore empty poll counter value.
199 rte_power_empty_poll_stat_fetch(unsigned int lcore_id);
202 * Fetch specific core valid poll counter.
208 * Current lcore valid poll counter value.
212 rte_power_poll_stat_fetch(unsigned int lcore_id);
215 * Empty poll state change detection function
218 * The timer structure
220 * The customized parameter
224 rte_empty_poll_detection(struct rte_timer *tim, void *arg);