1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com)
*
* This file's license is 2-clause BSD as in this distribution's LICENSE file.
*/
#define TEST_INIT
#include <timesys.h>
#include <rtems/btimer.h>
const char rtems_test_name[] = "RHSEMSHUFFLE";
#define BENCHMARKS 50000
rtems_task Task01( rtems_task_argument ignored );
rtems_task Task02( rtems_task_argument ignored );
rtems_task Init( rtems_task_argument ignored );
rtems_id Task_id[2];
rtems_name Task_name[2];
rtems_id sem_id;
rtems_name sem_name;
uint32_t telapsed;
uint32_t tswitch_overhead;
uint32_t count;
uint32_t sem_exe;
rtems_task Init( rtems_task_argument ignored )
{
rtems_status_code status;
rtems_attribute sem_attr;
rtems_task_priority pri;
rtems_mode prev_mode;
Print_Warning();
TEST_BEGIN();
sem_attr = RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY;
sem_name = rtems_build_name( 'S','0',' ',' ' );
status = rtems_semaphore_create(
sem_name,
1,
sem_attr,
0,
&sem_id
);
directive_failed( status, "rtems_semaphore_create of S0" );
Task_name[0] = rtems_build_name( 'T','A','0','1' );
status = rtems_task_create(
Task_name[0],
30,
RTEMS_MINIMUM_STACK_SIZE,
RTEMS_DEFAULT_MODES,
RTEMS_DEFAULT_ATTRIBUTES,
&Task_id[0]
);
directive_failed( status, "rtems_task_create of TA01" );
Task_name[1] = rtems_build_name( 'T','A','0','2' );
status = rtems_task_create(
Task_name[1],
30,
RTEMS_MINIMUM_STACK_SIZE,
RTEMS_DEFAULT_MODES,
RTEMS_DEFAULT_ATTRIBUTES,
&Task_id[1]
);
directive_failed( status , "rtems_task_create of TA02\n" );
rtems_task_mode( RTEMS_PREEMPT, RTEMS_PREEMPT_MASK, &prev_mode );
/* Lower own priority so TA01 can start up and run */
rtems_task_set_priority( RTEMS_SELF, 40, &pri);
/* Get time of benchmark with no semaphore shuffling */
sem_exe = 0;
status = rtems_task_start( Task_id[0], Task01, 0 );
directive_failed( status, "rtems_task_start of TA01" );
/* Get time of benchmark with semaphore shuffling */
sem_exe = 1;
status = rtems_task_restart( Task_id[0], 0 );
directive_failed( status, "rtems_task_restart of TA01" );
/* Should never reach here */
rtems_test_assert( false );
}
rtems_task Task01( rtems_task_argument ignored )
{
rtems_status_code status;
/* Start up TA02, yield so it can run */
if ( sem_exe == 0 ) {
status = rtems_task_start( Task_id[1], Task02, 0 );
directive_failed( status, "rtems_task_start of TA02" );
} else {
status = rtems_task_restart( Task_id[1], 0 );
directive_failed( status, "rtems_task_restart of TA02" );
}
rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
/* Benchmark code */
for ( ; count < BENCHMARKS ; ) {
if ( sem_exe == 1 ) {
rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 );
}
rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
if ( sem_exe == 1 ) {
rtems_semaphore_release( sem_id );
}
rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
}
/* Should never reach here */
rtems_test_assert( false );
}
rtems_task Task02( rtems_task_argument ignored )
{
/* Benchmark code */
benchmark_timer_initialize();
for ( count = 0; count < BENCHMARKS; count++ ) {
if ( sem_exe == 1 ) {
rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 );
}
rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
if ( sem_exe == 1 ) {
rtems_semaphore_release( sem_id );
}
rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
}
telapsed = benchmark_timer_read();
/* Check which run this was */
if (sem_exe == 0) {
tswitch_overhead = telapsed;
rtems_task_suspend( Task_id[0] );
rtems_task_suspend( RTEMS_SELF );
} else {
put_time(
"Rhealstone: Semaphore Shuffle",
telapsed,
(BENCHMARKS * 2), /* Total number of semaphore-shuffles*/
tswitch_overhead, /* Overhead of loop and task switches */
0
);
TEST_END();
rtems_test_exit( 0 );
}
}
/* configuration information */
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_MAXIMUM_TASKS 3
#define CONFIGURE_MAXIMUM_SEMAPHORES 1
#define CONFIGURE_INIT
#include <rtems/confdefs.h>
|
