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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2010-2021, 2023 Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
*
* StarPU is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* StarPU is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License in COPYING.LGPL for more details.
*/
/*
* This examplifies how to get task execution profiling from the application.
*/
#include <starpu.h>
#include <assert.h>
#include <unistd.h>
#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)
#ifdef STARPU_QUICK_CHECK
static unsigned niter = 50;
#else
static unsigned niter = 500;
#endif
void sleep_codelet(void *descr[], void *arg)
{
(void)descr;
(void)arg;
starpu_usleep(1000);
}
int main(int argc, char **argv)
{
int ret;
if (argc == 2)
niter = atoi(argv[1]);
ret = starpu_init(NULL);
if (ret == -ENODEV)
return 77;
STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
/* Enable profiling */
starpu_profiling_status_set(STARPU_PROFILING_ENABLE);
#ifdef STARPU_QUICK_CHECK
/* We should observe at least 50ms in the sleep time reported by every
* worker. */
starpu_usleep(50000);
#else
/* We should observe at least 500ms in the sleep time reported by every
* worker. */
starpu_usleep(500000);
#endif
struct starpu_codelet cl =
{
.cpu_funcs = {sleep_codelet},
.cpu_funcs_name = {"sleep_codelet"},
.cuda_funcs = {sleep_codelet},
.opencl_funcs = {sleep_codelet},
.nbuffers = 0,
.name = "sleep"
};
struct starpu_task **tasks = (struct starpu_task **) malloc(niter*sizeof(struct starpu_task *));
assert(tasks);
unsigned i;
for (i = 0; i < niter; i++)
{
struct starpu_task *task = starpu_task_create();
task->cl = &cl;
/* We will destroy the task structure by hand so that we can
* query the profiling info before the task is destroyed. */
task->destroy = 0;
tasks[i] = task;
ret = starpu_task_submit(task);
if (STARPU_UNLIKELY(ret == -ENODEV))
{
FPRINTF(stderr, "No worker may execute this task\n");
exit(0);
}
}
starpu_task_wait_for_all();
double delay_sum = 0.0;
double length_sum = 0.0;
for (i = 0; i < niter; i++)
{
struct starpu_task *task = tasks[i];
struct starpu_profiling_task_info *info = task->profiling_info;
/* How much time did it take before the task started ? */
delay_sum += starpu_timing_timespec_delay_us(&info->submit_time, &info->start_time);
/* How long was the task execution ? */
length_sum += starpu_timing_timespec_delay_us(&info->start_time, &info->end_time);
/* We don't need the task structure anymore */
starpu_task_destroy(task);
}
free(tasks);
if (niter)
{
FPRINTF(stderr, "Avg. delay : %2.2lf us\n", (delay_sum)/niter);
FPRINTF(stderr, "Avg. length : %2.2lf us\n", (length_sum)/niter);
}
/* Display the occupancy of all workers during the test */
unsigned worker;
for (worker = 0; worker < starpu_worker_get_count(); worker++)
{
struct starpu_profiling_worker_info worker_info;
ret = starpu_profiling_worker_get_info(worker, &worker_info);
STARPU_ASSERT(!ret);
double total_time = starpu_timing_timespec_to_us(&worker_info.total_time);
double executing_time = starpu_timing_timespec_to_us(&worker_info.executing_time);
double sleeping_time = starpu_timing_timespec_to_us(&worker_info.sleeping_time);
double overhead_time = total_time - executing_time - sleeping_time;
float executing_ratio = 100.0*executing_time/total_time;
float sleeping_ratio = 100.0*sleeping_time/total_time;
float overhead_ratio = 100.0 - executing_ratio - sleeping_ratio;
char workername[128];
starpu_worker_get_name(worker, workername, 128);
FPRINTF(stderr, "Worker %s:\n", workername);
FPRINTF(stderr, "\t%d task(s)\n", worker_info.executed_tasks);
FPRINTF(stderr, "\ttotal time : %.2lf ms\n", total_time*1e-3);
FPRINTF(stderr, "\texec time : %.2lf ms (%.2f %%)\n", executing_time*1e-3, executing_ratio);
FPRINTF(stderr, "\tblocked time : %.2lf ms (%.2f %%)\n", sleeping_time*1e-3, sleeping_ratio);
FPRINTF(stderr, "\toverhead time: %.2lf ms (%.2f %%)\n", overhead_time*1e-3, overhead_ratio);
}
starpu_shutdown();
return 0;
}
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