source: rtems/testsuites/rhealstone/rhtaskpreempt/taskpreempt.c @ b6c1578

4.115
Last change on this file since b6c1578 was b6c1578, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 5, 2014 at 5:17:08 PM

rhealstone: Add rh prefix to all test names

This makes them easier to spot as a group in wildcard searches.

  • Property mode set to 100644
File size: 3.5 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#include <timesys.h>
8#include <rtems/timerdrv.h>
9#define BENCHMARKS 50000   /* Number of benchmarks to run and average over */
10
11rtems_task Task02( rtems_task_argument ignored );
12rtems_task Task01( rtems_task_argument ignored );
13rtems_task Init( rtems_task_argument ignored );
14
15rtems_id           Task_id[2];
16rtems_name         Task_name[2];
17
18uint32_t           telapsed;          /* total time elapsed during benchmark */
19uint32_t           tloop_overhead;    /* overhead of loops */
20uint32_t           tswitch_overhead;  /* overhead of time it takes to switch
21                                       * from TA02 to TA01, includes rtems_suspend
22                                       * overhead
23                                       */
24unsigned long      count1;
25rtems_status_code  status;
26
27rtems_task Task01( rtems_task_argument ignored )
28{
29  /* Start up TA02, get preempted */
30  status = rtems_task_start( Task_id[1], Task02, 0);
31  directive_failed( status, "rtems_task_start of TA02");
32
33  tswitch_overhead = benchmark_timer_read();
34
35  benchmark_timer_initialize();
36  /* Benchmark code */
37  for ( count1 = 0; count1 < BENCHMARKS; count1++ ) {
38    rtems_task_resume( Task_id[1] );  /* Awaken TA02, preemption occurs */
39  }
40
41  /* Should never reach here */
42  rtems_test_assert( false );
43}
44
45rtems_task Task02( rtems_task_argument ignored )
46{
47  /* Find overhead of task switch back to TA01 (not a preemption) */
48  benchmark_timer_initialize();
49  rtems_task_suspend( RTEMS_SELF );
50
51  /* Benchmark code */
52  for ( ; count1 < BENCHMARKS - 1; ) {
53    rtems_task_suspend( RTEMS_SELF );
54  }
55
56  telapsed = benchmark_timer_read();
57  put_time(
58     "Rhealstone: Task Preempt",
59     telapsed,                     /* Total time of all benchmarks */
60     BENCHMARKS - 1,               /* BENCHMARKS - 1 total preemptions */
61     tloop_overhead,               /* Overhead of loops */
62     tswitch_overhead              /* Overhead of task switch back to TA01 */
63  );
64
65  rtems_test_exit( 0 );
66}
67
68rtems_task Init( rtems_task_argument ignored )
69{
70  Print_Warning();
71
72  Task_name[0] = rtems_build_name( 'T','A','0','1' );
73  status = rtems_task_create(
74    Task_name[0],
75    30,               /* TA01 is low priority task */
76    RTEMS_MINIMUM_STACK_SIZE,
77    RTEMS_DEFAULT_MODES,
78    RTEMS_DEFAULT_ATTRIBUTES,
79    &Task_id[0]
80  );
81  directive_failed( status, "rtems_task_create of TA01");
82
83  Task_name[1] = rtems_build_name( 'T','A','0','2' );
84  status = rtems_task_create(
85    Task_name[1],
86    28,               /* TA02 is high priority task */
87    RTEMS_MINIMUM_STACK_SIZE,
88    RTEMS_DEFAULT_MODES,
89    RTEMS_DEFAULT_ATTRIBUTES,
90    &Task_id[1]
91  );
92  directive_failed( status, "rtems_task_create of TA02");
93
94  /* Find loop overhead */
95  benchmark_timer_initialize();
96  for ( count1 = 0; count1 < ( BENCHMARKS * 2 ) - 1; count1++ ); {
97     /* rtems_task_resume( Task_id[1] ); */
98  }
99  tloop_overhead = benchmark_timer_read();
100
101  status = rtems_task_start( Task_id[0], Task01, 0 );
102  directive_failed( status, "rtems_task_start of TA01");
103
104  status = rtems_task_delete( RTEMS_SELF );
105  directive_failed( status, "rtems_task_delete of INIT");
106}
107
108/* configuration information */
109#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
110#define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER
111#define CONFIGURE_TICKS_PER_TIMESLICE        0
112#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
113#define CONFIGURE_MAXIMUM_TASKS 3
114#define CONFIGURE_INIT
115#include <rtems/confdefs.h>
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