1 /******************************************************************************
3 * Copyright (c) 2019 Intel.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 *******************************************************************************/
20 * @brief This file provides implementation to Timing for XRAN.
23 * @ingroup group_lte_source_xran
24 * @author Intel Corporation
33 #include "xran_timer.h"
34 #include "xran_printf.h"
35 #include "xran_mlog_lnx.h"
36 #include "xran_lib_mlog_tasks_id.h"
38 #include "xran_fh_o_du.h"
39 #include "xran_common.h"
41 #define NSEC_PER_SEC 1000000000L
42 #define NSEC_PER_USEC 1000L
43 #define THRESHOLD 35 /**< the avg cost of clock_gettime() in ns */
44 #define TIMECOMPENSATION 2 /**< time compensation in us, avg latency of clock_nanosleep */
46 #define SEC_MOD_STOP (60)
48 static struct timespec started_time;
49 static struct timespec last_time;
50 static struct timespec cur_time;
52 static struct timespec* p_cur_time = &cur_time;
53 static struct timespec* p_last_time = &last_time;
55 static struct timespec* p_temp_time;
57 static unsigned long current_second = 0;
58 static unsigned long started_second = 0;
59 static uint8_t numerlogy = 0;
60 extern uint32_t xran_lib_ota_sym;
61 extern uint32_t xran_lib_ota_tti;
62 extern uint32_t xran_lib_ota_sym_idx;
64 static int debugStop = 0;
65 static int debugStopCount = 0;
67 static long fine_tuning[5][2] =
69 {71428L, 71429L}, /* mu = 0 */
70 {35714L, 35715L}, /* mu = 1 */
71 {0, 0}, /* mu = 2 not supported */
72 {8928L, 8929L}, /* mu = 3 */
73 {0,0 } /* mu = 4 not supported */
76 static uint8_t slots_per_subframe[4] =
84 uint64_t timing_get_current_second(void)
86 return current_second;
89 int timing_set_numerology(uint8_t value)
95 int timing_set_debug_stop(int value, int count)
98 debugStopCount = count;
101 clock_gettime(CLOCK_REALTIME, &started_time);
102 started_second =started_time.tv_sec;
107 int timing_get_debug_stop(void)
112 long poll_next_tick(long interval_ns)
116 static int counter = 0;
117 static long sym_acc = 0;
118 static long sym_cnt = 0;
121 clock_gettime(CLOCK_REALTIME, p_last_time);
122 current_second = p_last_time->tv_sec;
126 target_time = (p_last_time->tv_sec * NSEC_PER_SEC + p_last_time->tv_nsec + interval_ns);
130 clock_gettime(CLOCK_REALTIME, p_cur_time);
131 delta = (p_cur_time->tv_sec * NSEC_PER_SEC + p_cur_time->tv_nsec) - target_time;
132 if(delta > 0 || (delta < 0 && abs(delta) < THRESHOLD)) {
133 if (debugStop &&(debugStopCount > 0) && (tx_counter >= debugStopCount)){
135 printf("STOP:[%ld.%09ld], debugStopCount %d, tx_counter %ld\n", p_cur_time->tv_sec, p_cur_time->tv_nsec, debugStopCount, tx_counter);
138 MLogTask(PID_TIME_SYSTIME_STOP, t1, MLogTick());
139 xran_if_current_state = XRAN_STOPPED;
141 if(current_second != p_cur_time->tv_sec){
142 current_second = p_cur_time->tv_sec;
143 xran_lib_ota_sym_idx = 0;
144 xran_lib_ota_tti = 0;
145 xran_lib_ota_sym = 0;
148 print_dbg("ToS:C Sync timestamp: [%ld.%09ld]\n", p_cur_time->tv_sec, p_cur_time->tv_nsec);
150 if(p_cur_time->tv_sec > started_second && ((p_cur_time->tv_sec % SEC_MOD_STOP) == 0)){
152 printf("STOP:[%ld.%09ld]\n", p_cur_time->tv_sec, p_cur_time->tv_nsec);
155 MLogTask(PID_TIME_SYSTIME_STOP, t1, MLogTick());
156 xran_if_current_state = XRAN_STOPPED;
159 p_cur_time->tv_nsec = 0; // adjust to 1pps
161 xran_lib_ota_sym_idx = XranIncrementSymIdx(xran_lib_ota_sym_idx, XRAN_NUM_OF_SYMBOL_PER_SLOT*slots_per_subframe[numerlogy]);
162 /* adjust to sym boundary */
164 sym_acc += fine_tuning[numerlogy][0];
166 sym_acc += fine_tuning[numerlogy][1];
167 /* fine tune to second boundary */
168 if(sym_cnt % 13 == 0)
171 p_cur_time->tv_nsec = sym_acc;
174 if(debugStop && delta < interval_ns*10)
175 MLogTask(PID_TIME_SYSTIME_POLL, (p_last_time->tv_sec * NSEC_PER_SEC + p_last_time->tv_nsec), (p_cur_time->tv_sec * NSEC_PER_SEC + p_cur_time->tv_nsec));
176 p_temp_time = p_last_time;
177 p_last_time = p_cur_time;
178 p_cur_time = p_temp_time;
181 if( likely(xran_if_current_state == XRAN_RUNNING)){
182 ring_processing_func();
191 long sleep_next_tick(long interval)
193 struct timespec start_time;
194 struct timespec cur_time;
195 //struct timespec target_time_convert;
196 struct timespec sleep_target_time_convert;
198 long sleep_target_time;
201 clock_gettime(CLOCK_REALTIME, &start_time);
202 target_time = (start_time.tv_sec * NSEC_PER_SEC + start_time.tv_nsec + interval * NSEC_PER_USEC) / (interval * NSEC_PER_USEC) * interval;
203 //printf("target: %ld, current: %ld, %ld\n", target_time, start_time.tv_sec, start_time.tv_nsec);
204 sleep_target_time = target_time - TIMECOMPENSATION;
205 sleep_target_time_convert.tv_sec = sleep_target_time * NSEC_PER_USEC / NSEC_PER_SEC;
206 sleep_target_time_convert.tv_nsec = (sleep_target_time * NSEC_PER_USEC) % NSEC_PER_SEC;
208 //target_time_convert.tv_sec = target_time * NSEC_PER_USEC / NSEC_PER_SEC;
209 //target_time_convert.tv_nsec = (target_time * NSEC_PER_USEC) % NSEC_PER_SEC;
211 clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &sleep_target_time_convert, NULL);
213 clock_gettime(CLOCK_REALTIME, &cur_time);
215 delta = (cur_time.tv_sec * NSEC_PER_SEC + cur_time.tv_nsec) - target_time * NSEC_PER_USEC;