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author | Joel Sherrill <joel.sherrill@oarcorp.com> | 2014-01-05 11:17:08 -0600 |
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committer | Joel Sherrill <joel.sherrill@oarcorp.com> | 2014-01-05 11:17:08 -0600 |
commit | b6c1578bb91fb54c826141e0f8bbd9cb2009f3cf (patch) | |
tree | 6d4c9af3892de78428add886865bae7db15efbc1 /testsuites/rhealstone/rhsemshuffle | |
parent | rhealstone/*.c: Add Print_Warning() call to indicate debug enabled (diff) | |
download | rtems-b6c1578bb91fb54c826141e0f8bbd9cb2009f3cf.tar.bz2 |
rhealstone: Add rh prefix to all test names
This makes them easier to spot as a group in wildcard searches.
Diffstat (limited to 'testsuites/rhealstone/rhsemshuffle')
-rw-r--r-- | testsuites/rhealstone/rhsemshuffle/Makefile.am | 23 | ||||
-rw-r--r-- | testsuites/rhealstone/rhsemshuffle/rhsemshuffle.adoc | 26 | ||||
-rw-r--r-- | testsuites/rhealstone/rhsemshuffle/semshuffle.c | 160 |
3 files changed, 209 insertions, 0 deletions
diff --git a/testsuites/rhealstone/rhsemshuffle/Makefile.am b/testsuites/rhealstone/rhsemshuffle/Makefile.am new file mode 100644 index 0000000000..88448297cf --- /dev/null +++ b/testsuites/rhealstone/rhsemshuffle/Makefile.am @@ -0,0 +1,23 @@ +MANAGERS = all + +rtems_tests_PROGRAMS = rhsemshuffle +rhsemshuffle_SOURCES = semshuffle.c +rhsemshuffle_SOURCES += ../../tmtests/include/timesys.h + +dist_rtems_tests_DATA = rhsemshuffle.adoc + +include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg +include $(top_srcdir)/../automake/compile.am +include $(top_srcdir)/../automake/leaf.am + +AM_CPPFLAGS += -I$(top_srcdir)/../tmtests/include +AM_CPPFLAGS += -I$(top_srcdir)/../support/include + +LINK_OBJS = $(rhsemshuffle_OBJECTS) $(rhsemshuffle_LDADD) +LINK_LIBS = $(rhsemshuffle_LDLIBS) + +rhsemshuffle$(EXEEXT): $(rhsemshuffle_OBJECTS) $(rhsemshuffle_DEPENDENCIES) + @rm -f rhsemshuffle$(EXEEXT) + $(make-exe) + +include $(top_srcdir)/../automake/local.am diff --git a/testsuites/rhealstone/rhsemshuffle/rhsemshuffle.adoc b/testsuites/rhealstone/rhsemshuffle/rhsemshuffle.adoc new file mode 100644 index 0000000000..c2fc2e49f0 --- /dev/null +++ b/testsuites/rhealstone/rhsemshuffle/rhsemshuffle.adoc @@ -0,0 +1,26 @@ += Semaphore Shuffle Benchmark + +This benchmark measures the average delay between a task's release of a +semaphore and the activation of another task blocked on that semaphore. + +== Directives + + * rtems_semaphore_obtain + * rtems_semaphore_release + * rtems_task_wake_after + + +== Methodology + +This benchmark has two equal priority tasks switch between themselves a total +of BENCHMARKS * 2 times. This is timed, and then execute the same code but +having the tasks pass a semphore between themselves. A task obtains the +semphore, then yields to the other task, which blocks on the semaphore. The +task owning the semaphore then releases it and yields. This process is +repeated by the other task. + +This benchmark has overhead, especially in the time it takes to switch between +the two tasks, which happens a total of 2 times per semaphore shuffle. By first +timing how long it takes the tasks to switch between themselves without any +semaphore related calls, the overhead time is found. This time is then subtracted +from the total time of the benchmark, with semaphore shuffling occuring. diff --git a/testsuites/rhealstone/rhsemshuffle/semshuffle.c b/testsuites/rhealstone/rhsemshuffle/semshuffle.c new file mode 100644 index 0000000000..a4b499f15b --- /dev/null +++ b/testsuites/rhealstone/rhsemshuffle/semshuffle.c @@ -0,0 +1,160 @@ +/* + * Copyright (c) 2014 Daniel Ramirez. (javamonn@gmail.com) + * + * This file's license is 2-clause BSD as in this distribution's LICENSE file. + */ + +#include <rtems/timerdrv.h> +#include <timesys.h> + +#define BENCHMARKS 50000 + +rtems_task Task01( rtems_task_argument ignored ); +rtems_task Task02( rtems_task_argument ignored ); +rtems_task Init( rtems_task_argument ignored ); + +rtems_id Task_id[2]; +rtems_name Task_name[2]; +rtems_id sem_id; +rtems_name sem_name; + +uint32_t telapsed; +uint32_t tswitch_overhead; +uint32_t count; +uint32_t sem_exe; + +rtems_task Init( rtems_task_argument ignored ) +{ + rtems_status_code status; + rtems_attribute sem_attr; + rtems_task_priority pri; + rtems_mode prev_mode; + + Print_Warning(); + + sem_attr = RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY; + + sem_name = rtems_build_name( 'S','0',' ',' ' ); + status = rtems_semaphore_create( + sem_name, + 1, + sem_attr, + 0, + &sem_id + ); + directive_failed( status, "rtems_semaphore_create of S0" ); + + Task_name[0] = rtems_build_name( 'T','A','0','1' ); + status = rtems_task_create( + Task_name[0], + 30, + 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], + 30, + RTEMS_MINIMUM_STACK_SIZE, + RTEMS_DEFAULT_MODES, + RTEMS_DEFAULT_ATTRIBUTES, + &Task_id[1] + ); + directive_failed( status , "rtems_task_create of TA02\n" ); + + rtems_task_mode( RTEMS_PREEMPT, RTEMS_PREEMPT_MASK, &prev_mode ); + /* Lower own priority so TA01 can start up and run */ + rtems_task_set_priority( RTEMS_SELF, 40, &pri); + + /* Get time of benchmark with no semaphore shuffling */ + sem_exe = 0; + status = rtems_task_start( Task_id[0], Task01, 0 ); + directive_failed( status, "rtems_task_start of TA01" ); + + /* Get time of benchmark with semaphore shuffling */ + sem_exe = 1; + status = rtems_task_restart( Task_id[0], 0 ); + directive_failed( status, "rtems_task_restart of TA01" ); + + /* Should never reach here */ + rtems_test_assert( false ); +} + +rtems_task Task01( rtems_task_argument ignored ) +{ + rtems_status_code status; + + /* Start up TA02, yield so it can run */ + if ( sem_exe == 0 ) { + status = rtems_task_start( Task_id[1], Task02, 0 ); + directive_failed( status, "rtems_task_start of TA02" ); + } else { + status = rtems_task_restart( Task_id[1], 0 ); + directive_failed( status, "rtems_task_restart of TA02" ); + } + rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); + + /* Benchmark code */ + for ( ; count < BENCHMARKS ; ) { + if ( sem_exe == 1 ) { + rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 ); + } + rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); + + if ( sem_exe == 1 ) { + rtems_semaphore_release( sem_id ); + } + rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); + } + + /* Should never reach here */ + rtems_test_assert( false ); +} + +rtems_task Task02( rtems_task_argument ignored ) +{ + + /* Benchmark code */ + benchmark_timer_initialize(); + for ( count = 0; count < BENCHMARKS; count++ ) { + if ( sem_exe == 1 ) { + rtems_semaphore_obtain( sem_id, RTEMS_WAIT, 0 ); + } + rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); + + if ( sem_exe == 1 ) { + rtems_semaphore_release( sem_id ); + } + rtems_task_wake_after( RTEMS_YIELD_PROCESSOR ); + } + telapsed = benchmark_timer_read(); + + /* Check which run this was */ + if (sem_exe == 0) { + tswitch_overhead = telapsed; + rtems_task_suspend( Task_id[0] ); + rtems_task_suspend( RTEMS_SELF ); + } else { + put_time( + "Rhealstone: Semaphore Shuffle", + telapsed, + (BENCHMARKS * 2), /* Total number of semaphore-shuffles*/ + tswitch_overhead, /* Overhead of loop and task switches */ + 0 + ); + rtems_test_exit( 0 ); + } +} + +/* configuration information */ +#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER +#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER +#define CONFIGURE_RTEMS_INIT_TASKS_TABLE +#define CONFIGURE_MAXIMUM_TASKS 3 +#define CONFIGURE_MAXIMUM_SEMAPHORES 1 +#define CONFIGURE_INIT +#include <rtems/confdefs.h> |