forked from Imagelibrary/rtems
119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/*
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* Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com)
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*
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* This file's license is 2-clause BSD as in this distribution's LICENSE file.
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*/
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#include <rtems/timerdrv.h>
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#include <timesys.h>
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#define BENCHMARKS 50000
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rtems_task Task01( rtems_task_argument ignored );
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rtems_task Task02( rtems_task_argument ignored );
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rtems_task Init( rtems_task_argument ignored );
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rtems_id Task_id[2];
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rtems_name Task_name[2];
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uint32_t loop_overhead;
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uint32_t dir_overhead;
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unsigned long count1, count2;
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rtems_status_code status;
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rtems_task Task02( rtems_task_argument ignored )
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{
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uint32_t telapsed;
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/* All overhead accounted for now, we can begin benchmark */
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benchmark_timer_initialize();
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for ( count1 = 0; count1 < BENCHMARKS - 1; count1++ ) {
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rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
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}
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telapsed = benchmark_timer_read();
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put_time(
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"Rhealstone: Task switch",
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telapsed,
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( BENCHMARKS * 2 ) - 1, /* ( BENCHMARKS * 2 ) - 1 total benchmarks */
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loop_overhead, /* Overhead of loop */
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dir_overhead /* Overhead of rtems_task_wake_after directive */
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);
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rtems_test_exit( 0 );
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}
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rtems_task Task01( rtems_task_argument ignored )
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{
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status = rtems_task_start( Task_id[1], Task02, 0 );
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directive_failed( status, "rtems_task_start of TA02" );
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/* Yield processor so second task can startup and run */
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rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
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for ( count2 = 0; count2 < BENCHMARKS; count2++ ) {
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rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
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}
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/* Should never reach here */
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rtems_test_assert( false );
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}
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rtems_task Init( rtems_task_argument ignored )
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{
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Print_Warning();
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Task_name[0] = rtems_build_name( 'T','A','0','1' );
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status = rtems_task_create(
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Task_name[0],
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30,
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RTEMS_MINIMUM_STACK_SIZE,
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RTEMS_DEFAULT_MODES,
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RTEMS_DEFAULT_ATTRIBUTES,
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&Task_id[0]
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);
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directive_failed( status, "rtems_task_create of TA01" );
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Task_name[1] = rtems_build_name( 'T','A','0','2' );
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status = rtems_task_create(
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Task_name[1],
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30,
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RTEMS_MINIMUM_STACK_SIZE,
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RTEMS_DEFAULT_MODES,
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RTEMS_DEFAULT_ATTRIBUTES,
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&Task_id[1]
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);
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directive_failed( status, "rtems_task_create of TA02" );
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/* find overhead of routine (no task switches) */
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benchmark_timer_initialize();
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for ( count1 = 0; count1 < BENCHMARKS - 1; count1++ ) {
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/* rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ) */
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}
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for ( count2 = 0; count2 < BENCHMARKS; count2++ ) {
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/* rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ) */
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}
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loop_overhead = benchmark_timer_read();
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/* find overhead of rtems_task_wake_after call (no task switches) */
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benchmark_timer_initialize();
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rtems_task_wake_after( RTEMS_YIELD_PROCESSOR );
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dir_overhead = benchmark_timer_read();
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status = rtems_task_start( Task_id[0], Task01, 0);
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directive_failed( status, "rtems_task_start of TA01" );
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status = rtems_task_delete( RTEMS_SELF);
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directive_failed( status, "rtems_task_delete of INIT" );
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}
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/* configuration information */
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#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
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#define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER
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#define CONFIGURE_TICKS_PER_TIMESLICE 0
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#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
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#define CONFIGURE_MAXIMUM_TASKS 3
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#define CONFIGURE_INIT
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#include <rtems/confdefs.h>
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