[19e9bf8] | 1 | /* |
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| 2 | * Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com) |
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| 3 | * |
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| 4 | * This file's license is 2-clause BSD as in this distribution's LICENSE file. |
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| 5 | */ |
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| 6 | |
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| 7 | #include <timesys.h> |
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| 8 | #include <rtems/timerdrv.h> |
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| 9 | #define BENCHMARKS 50000 /* Number of benchmarks to run and average over */ |
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| 10 | |
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| 11 | rtems_task Task02( rtems_task_argument ignored ); |
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| 12 | rtems_task Task01( rtems_task_argument ignored ); |
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| 13 | rtems_task Init( rtems_task_argument ignored ); |
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| 14 | |
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| 15 | rtems_id Task_id[2]; |
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| 16 | rtems_name Task_name[2]; |
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| 17 | |
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| 18 | uint32_t telapsed; /* total time elapsed during benchmark */ |
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| 19 | uint32_t tloop_overhead; /* overhead of loops */ |
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| 20 | uint32_t tswitch_overhead; /* overhead of time it takes to switch |
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| 21 | * from TA02 to TA01, includes rtems_suspend |
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| 22 | * overhead |
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| 23 | */ |
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| 24 | unsigned long count1; |
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| 25 | rtems_status_code status; |
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| 26 | |
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| 27 | rtems_task Task01( rtems_task_argument ignored ) |
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| 28 | { |
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| 29 | /* Start up TA02, get preempted */ |
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| 30 | status = rtems_task_start( Task_id[1], Task02, 0); |
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| 31 | directive_failed( status, "rtems_task_start of TA02"); |
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| 32 | |
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| 33 | tswitch_overhead = benchmark_timer_read(); |
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| 34 | |
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| 35 | benchmark_timer_initialize(); |
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| 36 | /* Benchmark code */ |
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| 37 | for ( count1 = 0; count1 < BENCHMARKS; count1++ ) { |
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| 38 | rtems_task_resume( Task_id[1] ); /* Awaken TA02, preemption occurs */ |
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| 39 | } |
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| 40 | |
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| 41 | /* Should never reach here */ |
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| 42 | rtems_test_assert( false ); |
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| 43 | } |
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| 44 | |
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| 45 | rtems_task Task02( rtems_task_argument ignored ) |
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| 46 | { |
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| 47 | /* Find overhead of task switch back to TA01 (not a preemption) */ |
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| 48 | benchmark_timer_initialize(); |
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| 49 | rtems_task_suspend( RTEMS_SELF ); |
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| 50 | |
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| 51 | /* Benchmark code */ |
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| 52 | for ( ; count1 < BENCHMARKS - 1; ) { |
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| 53 | rtems_task_suspend( RTEMS_SELF ); |
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| 54 | } |
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| 55 | |
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| 56 | telapsed = benchmark_timer_read(); |
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| 57 | put_time( |
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| 58 | "Rhealstone: Task Preempt", |
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| 59 | telapsed, /* Total time of all benchmarks */ |
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| 60 | BENCHMARKS - 1, /* BENCHMARKS - 1 total preemptions */ |
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| 61 | tloop_overhead, /* Overhead of loops */ |
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| 62 | tswitch_overhead /* Overhead of task switch back to TA01 */ |
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| 63 | ); |
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| 64 | |
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| 65 | rtems_test_exit( 0 ); |
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| 66 | } |
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| 67 | |
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| 68 | rtems_task Init( rtems_task_argument ignored ) |
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| 69 | { |
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[e8c7dbe7] | 70 | Print_Warning(); |
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| 71 | |
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[19e9bf8] | 72 | Task_name[0] = rtems_build_name( 'T','A','0','1' ); |
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| 73 | status = rtems_task_create( |
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| 74 | Task_name[0], |
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| 75 | 30, /* TA01 is low priority task */ |
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| 76 | RTEMS_MINIMUM_STACK_SIZE, |
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| 77 | RTEMS_DEFAULT_MODES, |
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| 78 | RTEMS_DEFAULT_ATTRIBUTES, |
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| 79 | &Task_id[0] |
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| 80 | ); |
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| 81 | directive_failed( status, "rtems_task_create of TA01"); |
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| 82 | |
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| 83 | Task_name[1] = rtems_build_name( 'T','A','0','2' ); |
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| 84 | status = rtems_task_create( |
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| 85 | Task_name[1], |
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| 86 | 28, /* TA02 is high priority task */ |
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| 87 | RTEMS_MINIMUM_STACK_SIZE, |
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| 88 | RTEMS_DEFAULT_MODES, |
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| 89 | RTEMS_DEFAULT_ATTRIBUTES, |
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| 90 | &Task_id[1] |
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| 91 | ); |
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| 92 | directive_failed( status, "rtems_task_create of TA02"); |
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| 93 | |
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| 94 | /* Find loop overhead */ |
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| 95 | benchmark_timer_initialize(); |
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| 96 | for ( count1 = 0; count1 < ( BENCHMARKS * 2 ) - 1; count1++ ); { |
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| 97 | /* rtems_task_resume( Task_id[1] ); */ |
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| 98 | } |
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| 99 | tloop_overhead = benchmark_timer_read(); |
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| 100 | |
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| 101 | status = rtems_task_start( Task_id[0], Task01, 0 ); |
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| 102 | directive_failed( status, "rtems_task_start of TA01"); |
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| 103 | |
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| 104 | status = rtems_task_delete( RTEMS_SELF ); |
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| 105 | directive_failed( status, "rtems_task_delete of INIT"); |
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| 106 | } |
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| 107 | |
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| 108 | /* configuration information */ |
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| 109 | #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER |
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| 110 | #define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER |
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| 111 | #define CONFIGURE_TICKS_PER_TIMESLICE 0 |
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| 112 | #define CONFIGURE_RTEMS_INIT_TASKS_TABLE |
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| 113 | #define CONFIGURE_MAXIMUM_TASKS 3 |
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| 114 | #define CONFIGURE_INIT |
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| 115 | #include <rtems/confdefs.h> |
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