1 /* mailbox_b.c */
2
3 /*
4 * Copyright (c) 1997-2010, 2013-2014 Wind River Systems, Inc.
5 *
6 * SPDX-License-Identifier: Apache-2.0
7 */
8
9 #include "master.h"
10
11 static struct k_mbox_msg message;
12
13 #define PRINT_HEADER() \
14 (PRINT_STRING \
15 ("| size(B) | time/packet (nsec) | KB/sec" \
16 " |\n"))
17
18 #define PRINT_ONE_RESULT() \
19 PRINT_F("|%11u|%32u|%32u|\n", putsize, puttime, \
20 (uint32_t) \
21 (((uint64_t)putsize * 1000000U) / SAFE_DIVISOR(puttime)))
22
23 #define PRINT_OVERHEAD() \
24 PRINT_F("| message overhead: %10u nsec/packet " \
25 " |\n", empty_msg_put_time)
26
27 #define PRINT_XFER_RATE() \
28 PRINT_F("| raw transfer rate: %10u KB/sec (without" \
29 " overhead) |\n", \
30 (uint32_t)((uint64_t)(putsize >> 1) * 1000000U / \
31 SAFE_DIVISOR(puttime - empty_msg_put_time)))
32
33 /*
34 * Function prototypes.
35 */
36 void mailbox_put(uint32_t size, int count, uint32_t *time);
37
38 /*
39 * Function declarations.
40 */
41
42 /**
43 * @brief Mailbox transfer speed test
44 */
mailbox_test(void)45 void mailbox_test(void)
46 {
47 uint32_t putsize;
48 uint32_t puttime;
49 int putcount;
50 unsigned int empty_msg_put_time;
51 struct getinfo getinfo;
52
53 PRINT_STRING(dashline);
54 PRINT_STRING("| "
55 "M A I L B O X M E A S U R E M E N T S"
56 " |\n");
57 PRINT_STRING(dashline);
58 PRINT_STRING("| Send mailbox message to waiting high "
59 "priority task and wait |\n");
60 PRINT_F("| repeat for %4d times and take the "
61 "average |\n",
62 NR_OF_MBOX_RUNS);
63 PRINT_STRING(dashline);
64 PRINT_HEADER();
65 PRINT_STRING(dashline);
66 k_sem_reset(&SEM0);
67 k_sem_give(&STARTRCV);
68
69 putcount = NR_OF_MBOX_RUNS;
70
71 putsize = 0U;
72 mailbox_put(putsize, putcount, &puttime);
73 /* waiting for ack */
74 k_msgq_get(&MB_COMM, &getinfo, K_FOREVER);
75 PRINT_ONE_RESULT();
76 empty_msg_put_time = puttime;
77 for (putsize = 8U; putsize <= MESSAGE_SIZE; putsize <<= 1) {
78 mailbox_put(putsize, putcount, &puttime);
79 /* waiting for ack */
80 k_msgq_get(&MB_COMM, &getinfo, K_FOREVER);
81 PRINT_ONE_RESULT();
82 }
83 PRINT_STRING(dashline);
84 PRINT_OVERHEAD();
85 PRINT_XFER_RATE();
86 }
87
88
89 /**
90 * @brief Write the number of data chunks into the mailbox
91 *
92 * @param size The size of the data chunk.
93 * @param count Number of data chunks.
94 * @param time The total time.
95 */
mailbox_put(uint32_t size,int count,uint32_t * time)96 void mailbox_put(uint32_t size, int count, uint32_t *time)
97 {
98 int i;
99 unsigned int t;
100 timing_t start;
101 timing_t end;
102
103 message.rx_source_thread = K_ANY;
104 message.tx_target_thread = K_ANY;
105
106 /* first sync with the receiver */
107 k_sem_give(&SEM0);
108 start = timing_timestamp_get();
109 for (i = 0; i < count; i++) {
110 k_mbox_put(&MAILB1, &message, K_FOREVER);
111 }
112 end = timing_timestamp_get();
113 t = (unsigned int)timing_cycles_get(&start, &end);
114 *time = SYS_CLOCK_HW_CYCLES_TO_NS_AVG(t, count);
115 }
116
