1 /* sema_b.c */
2
3 /*
4 * Copyright (c) 1997-2010, 2013-2015 Wind River Systems, Inc.
5 *
6 * SPDX-License-Identifier: Apache-2.0
7 */
8
9 #include "master.h"
10
11 /**
12 * @brief Semaphore signal speed test
13 */
sema_test(void)14 void sema_test(void)
15 {
16 uint32_t et; /* elapsed Time */
17 int i;
18 timing_t start;
19 timing_t end;
20
21 PRINT_STRING(dashline);
22 start = timing_timestamp_get();
23 for (i = 0; i < NR_OF_SEMA_RUNS; i++) {
24 k_sem_give(&SEM0);
25 }
26 end = timing_timestamp_get();
27 et = (uint32_t)timing_cycles_get(&start, &end);
28
29 PRINT_F(FORMAT, "signal semaphore",
30 SYS_CLOCK_HW_CYCLES_TO_NS_AVG(et, NR_OF_SEMA_RUNS));
31
32 k_sem_reset(&SEM1);
33 k_sem_give(&STARTRCV);
34
35 start = timing_timestamp_get();
36 for (i = 0; i < NR_OF_SEMA_RUNS; i++) {
37 k_sem_give(&SEM1);
38 }
39 end = timing_timestamp_get();
40 et = (uint32_t)timing_cycles_get(&start, &end);
41
42 PRINT_F(FORMAT, "signal to waiting high pri task",
43 SYS_CLOCK_HW_CYCLES_TO_NS_AVG(et, NR_OF_SEMA_RUNS));
44
45 start = timing_timestamp_get();
46 for (i = 0; i < NR_OF_SEMA_RUNS; i++) {
47 k_sem_give(&SEM1);
48 }
49 end = timing_timestamp_get();
50 et = (uint32_t)timing_cycles_get(&start, &end);
51
52 PRINT_F(FORMAT, "signal to waiting high pri task, with timeout",
53 SYS_CLOCK_HW_CYCLES_TO_NS_AVG(et, NR_OF_SEMA_RUNS));
54 }
55
