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/*
* Copyright (c) 2013-2015 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/test.h>
#include <rtems/score/assert.h>
#include <rtems.h>
static void stop_worker_timer(rtems_id timer_id, void *arg)
{
rtems_test_parallel_context *ctx = arg;
_Atomic_Store_ulong(&ctx->stop, 1, ATOMIC_ORDER_RELAXED);
}
static void start_worker_stop_timer(
rtems_test_parallel_context *ctx,
rtems_interval duration
)
{
rtems_status_code sc;
_Atomic_Store_ulong(&ctx->stop, 0, ATOMIC_ORDER_RELEASE);
sc = rtems_timer_fire_after(
ctx->stop_worker_timer_id,
duration,
stop_worker_timer,
ctx
);
_Assert(sc == RTEMS_SUCCESSFUL);
(void) sc;
}
static void run_tests(
rtems_test_parallel_context *ctx,
const rtems_test_parallel_job *jobs,
size_t job_count,
size_t worker_index
)
{
SMP_barrier_State bs = SMP_BARRIER_STATE_INITIALIZER;
size_t i;
for (i = 0; i < job_count; ++i) {
const rtems_test_parallel_job *job = &jobs[i];
size_t n = rtems_get_processor_count();
size_t j = job->cascade ? 0 : rtems_get_processor_count() - 1;
while (j < n) {
size_t active_worker = j + 1;
if (rtems_test_parallel_is_master_worker(worker_index)) {
rtems_interval duration = (*job->init)(ctx, job->arg, active_worker);
start_worker_stop_timer(ctx, duration);
}
_SMP_barrier_Wait(&ctx->barrier, &bs, ctx->worker_count);
if (worker_index <= j) {
(*job->body)(ctx, job->arg, active_worker, worker_index);
}
_SMP_barrier_Wait(&ctx->barrier, &bs, ctx->worker_count);
if (rtems_test_parallel_is_master_worker(worker_index)) {
(*job->fini)(ctx, job->arg, active_worker);
}
++j;
}
}
}
typedef struct {
rtems_test_parallel_context *ctx;
const rtems_test_parallel_job *jobs;
size_t job_count;
size_t worker_index;
} worker_arg;
static void worker_task(rtems_task_argument arg)
{
worker_arg warg = *(worker_arg *) arg;
rtems_status_code sc;
sc = rtems_event_transient_send(warg.ctx->worker_ids[0]);
_Assert(sc == RTEMS_SUCCESSFUL);
(void) sc;
run_tests(warg.ctx, warg.jobs, warg.job_count, warg.worker_index);
while (true) {
/* Wait for delete by master worker */
}
}
static char digit(size_t i, size_t pos)
{
return '0' + (i / pos) % 10;
}
void rtems_test_parallel(
rtems_test_parallel_context *ctx,
rtems_test_parallel_worker_setup worker_setup,
const rtems_test_parallel_job *jobs,
size_t job_count
)
{
rtems_status_code sc;
size_t worker_index;
rtems_task_priority worker_priority;
_Atomic_Init_ulong(&ctx->stop, 0);
_SMP_barrier_Control_initialize(&ctx->barrier);
ctx->worker_count = rtems_get_processor_count();
ctx->worker_ids[0] = rtems_task_self();
if (RTEMS_ARRAY_SIZE(ctx->worker_ids) < ctx->worker_count) {
rtems_fatal_error_occurred(0xdeadbeef);
}
sc = rtems_task_set_priority(
RTEMS_SELF,
RTEMS_CURRENT_PRIORITY,
&worker_priority
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal_error_occurred(0xdeadbeef);
}
sc = rtems_timer_create(
rtems_build_name('S', 'T', 'O', 'P'),
&ctx->stop_worker_timer_id
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal_error_occurred(0xdeadbeef);
}
for (worker_index = 1; worker_index < ctx->worker_count; ++worker_index) {
worker_arg warg = {
.ctx = ctx,
.jobs = jobs,
.job_count = job_count,
.worker_index = worker_index
};
rtems_id worker_id;
sc = rtems_task_create(
rtems_build_name(
'W',
digit(worker_index, 100),
digit(worker_index, 10),
digit(worker_index, 1)
),
worker_priority,
RTEMS_MINIMUM_STACK_SIZE,
RTEMS_DEFAULT_MODES,
RTEMS_DEFAULT_ATTRIBUTES,
&worker_id
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal_error_occurred(0xdeadbeef);
}
ctx->worker_ids[worker_index] = worker_id;
if (worker_setup != NULL) {
(*worker_setup)(ctx, worker_index, worker_id);
}
sc = rtems_task_start(worker_id, worker_task, (rtems_task_argument) &warg);
_Assert(sc == RTEMS_SUCCESSFUL);
sc = rtems_event_transient_receive(RTEMS_WAIT, RTEMS_NO_TIMEOUT);
_Assert(sc == RTEMS_SUCCESSFUL);
}
run_tests(ctx, jobs, job_count, 0);
for (worker_index = 1; worker_index < ctx->worker_count; ++worker_index) {
sc = rtems_task_delete(ctx->worker_ids[worker_index]);
_Assert(sc == RTEMS_SUCCESSFUL);
}
sc = rtems_timer_delete(ctx->stop_worker_timer_id);
_Assert(sc == RTEMS_SUCCESSFUL);
}
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