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/* Copyright (c) 2016, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/* This is a minimal application which demonstrates the startup and shutdown
* steps of an ODP application. It can be also used to debug API related
* build problems, etc. It does not use helpers to minimize dependency to
* anything else than the ODP API header file.
*/
/* Linux CPU affinity */
#define _GNU_SOURCE
#include <sched.h>
/* Linux PID */
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <odp_api.h>
typedef struct {
int cpu;
int num;
} options_t;
static int parse_args(int argc, char *argv[], options_t *opt)
{
static const char * const args[] = {"-c", "-n"};
int i, tmp;
for (i = 1; i < argc; i++) {
if ((strcmp(argv[i], args[0]) == 0) &&
(sscanf(argv[i + 1], "%i", &tmp) == 1)) {
opt->cpu = tmp;
i++;
} else if ((strcmp(argv[i], args[1]) == 0) &&
(sscanf(argv[i + 1], "%i", &tmp) == 1)) {
opt->num = tmp;
i++;
} else {
printf("\nUsage:\n"
" %s CPU number\n"
" %s Number of iterations\n\n",
args[0], args[1]);
return -1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
odp_instance_t inst;
options_t opt;
pid_t pid;
cpu_set_t cpu_set;
int i;
odp_cpumask_t mask;
memset(&opt, 0, sizeof(opt));
opt.cpu = 0;
opt.num = 1;
if (parse_args(argc, argv, &opt))
return -1;
pid = getpid();
if (odp_init_global(&inst, NULL, NULL)) {
printf("Global init failed.\n");
return -1;
}
odp_cpumask_default_control(&mask, 0);
opt.cpu = odp_cpumask_first(&mask);
CPU_ZERO(&cpu_set);
CPU_SET(opt.cpu, &cpu_set);
if (sched_setaffinity(pid, sizeof(cpu_set_t), &cpu_set)) {
printf("Set CPU affinity failed.\n");
return -1;
}
if (odp_init_local(inst, ODP_THREAD_CONTROL)) {
printf("Local init failed.\n");
return -1;
}
for (i = 0; i < opt.num; i++) {
printf("Hello world from CPU %i!\n", odp_cpu_id());
odp_time_wait_ns(ODP_TIME_SEC_IN_NS);
}
if (odp_term_local()) {
printf("Local term failed.\n");
return -1;
}
if (odp_term_global(inst)) {
printf("Global term failed.\n");
return -1;
}
return 0;
}
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