source: rtems/testsuites/rhealstone/rhmlatency/mlatency.c @ 893aac16

4.11
Last change on this file since 893aac16 was 893aac16, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 8, 2014 at 12:31:32 AM

rhealstone: Add start end and messages

  • Property mode set to 100644
File size: 4.0 KB
Line 
1/*
2 * Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com)
3 *
4 * This file's license is 2-clause BSD as in this distribution's LICENSE file.
5 */
6
7#ifdef HAVE_CONFIG_H
8#include "config.h"
9#endif
10
11#include <timesys.h>
12#include <rtems/timerdrv.h>
13
14#define MESSAGE_SIZE (sizeof(long) * 4)
15#define BENCHMARKS 50000
16
17rtems_task Init( rtems_task_argument ignored );
18rtems_task Task01( rtems_task_argument ignored );
19rtems_task Task02( rtems_task_argument ignored );
20
21uint32_t    telapsed;
22uint32_t    tloop_overhead;
23uint32_t    treceive_overhead;
24uint32_t    count;
25rtems_id    Task_id[2];
26rtems_name  Task_name[2];
27rtems_id    Queue_id;
28long        Buffer[4];
29
30void Init(
31  rtems_task_argument argument
32)
33{
34  rtems_status_code status;
35
36  Print_Warning();
37
38  puts( "*** START OF RHMLATENCY ***" );
39
40  status = rtems_message_queue_create(
41    rtems_build_name( 'M', 'Q', '1', ' '  ),
42    1,
43    MESSAGE_SIZE,
44    RTEMS_DEFAULT_ATTRIBUTES,
45    &Queue_id
46  );
47  directive_failed( status, "rtems_message_queue_create" );
48
49  Task_name[0] = rtems_build_name( 'T','A','0','1' );
50  status = rtems_task_create(
51    Task_name[0],
52    30,               /* TA01 is low priority task */
53    RTEMS_MINIMUM_STACK_SIZE,
54    RTEMS_DEFAULT_MODES,
55    RTEMS_DEFAULT_ATTRIBUTES,
56    &Task_id[0]
57  );
58  directive_failed( status, "rtems_task_create of TA01");
59
60  Task_name[1] = rtems_build_name( 'T','A','0','2' );
61  status = rtems_task_create(
62    Task_name[1],
63    28,               /* High priority task */
64    RTEMS_MINIMUM_STACK_SIZE,
65    RTEMS_DEFAULT_MODES,
66    RTEMS_DEFAULT_ATTRIBUTES,
67    &Task_id[1]
68  );
69  directive_failed( status, "rtems_task_create of TA01" );
70
71  benchmark_timer_initialize();
72  for ( count = 0; count < BENCHMARKS - 1; count++ ) {
73    /* message send/recieve */
74  }
75  tloop_overhead = benchmark_timer_read();
76
77  status = rtems_task_start( Task_id[0], Task01, 0 );
78  directive_failed( status, "rtems_task_start of TA01" );
79
80  status = rtems_task_delete( RTEMS_SELF );
81  directive_failed( status, "rtems_task_delete of RTEMS_SELF" );
82}
83
84rtems_task Task01( rtems_task_argument ignored )
85{
86  rtems_status_code status;
87
88  /* Put a message in the queue so recieve overhead can be found. */
89  (void) rtems_message_queue_send( Queue_id, Buffer, MESSAGE_SIZE );
90
91  /* Start up second task, get preempted */
92  status = rtems_task_start( Task_id[1], Task02, 0 );
93  directive_failed( status, "rtems_task_start" );
94
95  for ( ; count < BENCHMARKS; count++ ) {
96    (void) rtems_message_queue_send( Queue_id, Buffer, MESSAGE_SIZE );
97  }
98
99  /* Should never reach here */
100  rtems_test_assert( false );
101
102}
103
104rtems_task Task02( rtems_task_argument ignored )
105{
106  size_t size;
107
108  /* find recieve overhead - no preempt or task switch */
109  benchmark_timer_initialize();
110  (void) rtems_message_queue_receive(
111             Queue_id,
112             (long (*)[4]) Buffer,
113             &size,
114             RTEMS_DEFAULT_OPTIONS,
115             RTEMS_NO_TIMEOUT
116           );
117  treceive_overhead = benchmark_timer_read();
118
119  /* Benchmark code */
120  benchmark_timer_initialize();
121  for ( count = 0; count < BENCHMARKS - 1; count++ ) {
122    (void) rtems_message_queue_receive(
123             Queue_id,
124             (long (*)[4]) Buffer,
125             &size,
126             RTEMS_DEFAULT_OPTIONS,
127             RTEMS_NO_TIMEOUT
128           );
129  }
130  telapsed = benchmark_timer_read();
131
132  put_time(
133   "Rhealstone: Intertask Message Latency",
134   telapsed,                     /* Total time of all benchmarks */
135   BENCHMARKS - 1,               /* Total benchmarks */
136   tloop_overhead,               /* Overhead of loops */
137   treceive_overhead             /* Overhead of recieve call and task switch */
138  );
139
140  puts( "*** END OF RHMLATENCY ***" );
141  rtems_test_exit( 0 );
142}
143
144/* configuration information */
145
146#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
147#define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER
148
149#define CONFIGURE_MAXIMUM_TASKS              3
150#define CONFIGURE_MAXIMUM_MESSAGE_QUEUES     1
151#define CONFIGURE_TICKS_PER_TIMESLICE        0
152#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
153
154#define CONFIGURE_INIT
155#include <rtems/confdefs.h>
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