[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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[8fbe2e6] | 8 | #include <rtems/btimer.h> |
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[19e9bf8] | 9 | |
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| 10 | #define BENCHMARKS 50000 |
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| 11 | |
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[1d799ad] | 12 | const char rtems_test_name[] = "RHTASKSWITCH"; |
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| 13 | |
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[19e9bf8] | 14 | rtems_task Task01( rtems_task_argument ignored ); |
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| 15 | rtems_task Task02( rtems_task_argument ignored ); |
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| 16 | rtems_task Init( rtems_task_argument ignored ); |
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| 17 | |
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| 18 | rtems_id Task_id[2]; |
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| 19 | rtems_name Task_name[2]; |
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| 20 | uint32_t loop_overhead; |
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| 21 | uint32_t dir_overhead; |
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| 22 | unsigned long count1, count2; |
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| 23 | rtems_status_code status; |
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| 24 | |
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| 25 | rtems_task Task02( rtems_task_argument ignored ) |
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| 26 | { |
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| 27 | uint32_t telapsed; |
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| 28 | |
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| 29 | /* All overhead accounted for now, we can begin benchmark */ |
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| 30 | benchmark_timer_initialize(); |
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| 31 | |
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| 32 | for ( count1 = 0; count1 < BENCHMARKS - 1; count1++ ) { |
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| 33 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); |
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| 34 | } |
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| 35 | |
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| 36 | telapsed = benchmark_timer_read(); |
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| 37 | put_time( |
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| 38 | "Rhealstone: Task switch", |
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| 39 | telapsed, |
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| 40 | ( BENCHMARKS * 2 ) - 1, /* ( BENCHMARKS * 2 ) - 1 total benchmarks */ |
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| 41 | loop_overhead, /* Overhead of loop */ |
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| 42 | dir_overhead /* Overhead of rtems_task_wake_after directive */ |
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| 43 | ); |
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| 44 | |
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[1d799ad] | 45 | TEST_END(); |
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[19e9bf8] | 46 | rtems_test_exit( 0 ); |
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| 47 | } |
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| 48 | |
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| 49 | rtems_task Task01( rtems_task_argument ignored ) |
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| 50 | { |
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| 51 | status = rtems_task_start( Task_id[1], Task02, 0 ); |
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| 52 | directive_failed( status, "rtems_task_start of TA02" ); |
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| 53 | |
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| 54 | /* Yield processor so second task can startup and run */ |
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| 55 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); |
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| 56 | |
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| 57 | for ( count2 = 0; count2 < BENCHMARKS; count2++ ) { |
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| 58 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); |
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| 59 | } |
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| 60 | |
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| 61 | /* Should never reach here */ |
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| 62 | rtems_test_assert( false ); |
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| 63 | |
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| 64 | } |
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| 65 | |
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| 66 | rtems_task Init( rtems_task_argument ignored ) |
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| 67 | { |
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[e8c7dbe7] | 68 | Print_Warning(); |
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| 69 | |
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[1d799ad] | 70 | TEST_BEGIN(); |
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[893aac16] | 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, |
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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 | 30, |
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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 overhead of routine (no task switches) */ |
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| 95 | benchmark_timer_initialize(); |
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| 96 | for ( count1 = 0; count1 < BENCHMARKS - 1; count1++ ) { |
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| 97 | /* rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ) */ |
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| 98 | } |
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| 99 | for ( count2 = 0; count2 < BENCHMARKS; count2++ ) { |
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| 100 | /* rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ) */ |
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| 101 | } |
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| 102 | loop_overhead = benchmark_timer_read(); |
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| 103 | |
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| 104 | /* find overhead of rtems_task_wake_after call (no task switches) */ |
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| 105 | benchmark_timer_initialize(); |
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| 106 | rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); |
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| 107 | dir_overhead = benchmark_timer_read(); |
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| 108 | |
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| 109 | status = rtems_task_start( Task_id[0], Task01, 0); |
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| 110 | directive_failed( status, "rtems_task_start of TA01" ); |
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| 111 | |
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| 112 | status = rtems_task_delete( RTEMS_SELF); |
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| 113 | directive_failed( status, "rtems_task_delete of INIT" ); |
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| 114 | } |
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| 115 | |
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| 116 | /* configuration information */ |
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| 117 | #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER |
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| 118 | #define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER |
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| 119 | #define CONFIGURE_TICKS_PER_TIMESLICE 0 |
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| 120 | #define CONFIGURE_RTEMS_INIT_TASKS_TABLE |
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| 121 | #define CONFIGURE_MAXIMUM_TASKS 3 |
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| 122 | #define CONFIGURE_INIT |
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| 123 | #include <rtems/confdefs.h> |
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