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Diffstat (limited to 'testsuites/rhealstone/rhtaskpreempt/taskpreempt.c')
| -rw-r--r-- | testsuites/rhealstone/rhtaskpreempt/taskpreempt.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/testsuites/rhealstone/rhtaskpreempt/taskpreempt.c b/testsuites/rhealstone/rhtaskpreempt/taskpreempt.c new file mode 100644 index 0000000000..80e79229ce --- /dev/null +++ b/testsuites/rhealstone/rhtaskpreempt/taskpreempt.c @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com) + * + * This file's license is 2-clause BSD as in this distribution's LICENSE file. + */ + +#include <timesys.h> +#include <rtems/timerdrv.h> +#define BENCHMARKS 50000 /* Number of benchmarks to run and average over */ + +rtems_task Task02( rtems_task_argument ignored ); +rtems_task Task01( rtems_task_argument ignored ); +rtems_task Init( rtems_task_argument ignored ); + +rtems_id Task_id[2]; +rtems_name Task_name[2]; + +uint32_t telapsed; /* total time elapsed during benchmark */ +uint32_t tloop_overhead; /* overhead of loops */ +uint32_t tswitch_overhead; /* overhead of time it takes to switch + * from TA02 to TA01, includes rtems_suspend + * overhead + */ +unsigned long count1; +rtems_status_code status; + +rtems_task Task01( rtems_task_argument ignored ) +{ + /* Start up TA02, get preempted */ + status = rtems_task_start( Task_id[1], Task02, 0); + directive_failed( status, "rtems_task_start of TA02"); + + tswitch_overhead = benchmark_timer_read(); + + benchmark_timer_initialize(); + /* Benchmark code */ + for ( count1 = 0; count1 < BENCHMARKS; count1++ ) { + rtems_task_resume( Task_id[1] ); /* Awaken TA02, preemption occurs */ + } + + /* Should never reach here */ + rtems_test_assert( false ); +} + +rtems_task Task02( rtems_task_argument ignored ) +{ + /* Find overhead of task switch back to TA01 (not a preemption) */ + benchmark_timer_initialize(); + rtems_task_suspend( RTEMS_SELF ); + + /* Benchmark code */ + for ( ; count1 < BENCHMARKS - 1; ) { + rtems_task_suspend( RTEMS_SELF ); + } + + telapsed = benchmark_timer_read(); + put_time( + "Rhealstone: Task Preempt", + telapsed, /* Total time of all benchmarks */ + BENCHMARKS - 1, /* BENCHMARKS - 1 total preemptions */ + tloop_overhead, /* Overhead of loops */ + tswitch_overhead /* Overhead of task switch back to TA01 */ + ); + + rtems_test_exit( 0 ); +} + +rtems_task Init( rtems_task_argument ignored ) +{ + Print_Warning(); + + Task_name[0] = rtems_build_name( 'T','A','0','1' ); + status = rtems_task_create( + Task_name[0], + 30, /* TA01 is low priority task */ + RTEMS_MINIMUM_STACK_SIZE, + RTEMS_DEFAULT_MODES, + RTEMS_DEFAULT_ATTRIBUTES, + &Task_id[0] + ); + directive_failed( status, "rtems_task_create of TA01"); + + Task_name[1] = rtems_build_name( 'T','A','0','2' ); + status = rtems_task_create( + Task_name[1], + 28, /* TA02 is high priority task */ + RTEMS_MINIMUM_STACK_SIZE, + RTEMS_DEFAULT_MODES, + RTEMS_DEFAULT_ATTRIBUTES, + &Task_id[1] + ); + directive_failed( status, "rtems_task_create of TA02"); + + /* Find loop overhead */ + benchmark_timer_initialize(); + for ( count1 = 0; count1 < ( BENCHMARKS * 2 ) - 1; count1++ ); { + /* rtems_task_resume( Task_id[1] ); */ + } + tloop_overhead = benchmark_timer_read(); + + status = rtems_task_start( Task_id[0], Task01, 0 ); + directive_failed( status, "rtems_task_start of TA01"); + + status = rtems_task_delete( RTEMS_SELF ); + directive_failed( status, "rtems_task_delete of INIT"); +} + +/* configuration information */ +#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER +#define CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER +#define CONFIGURE_TICKS_PER_TIMESLICE 0 +#define CONFIGURE_RTEMS_INIT_TASKS_TABLE +#define CONFIGURE_MAXIMUM_TASKS 3 +#define CONFIGURE_INIT +#include <rtems/confdefs.h> |