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/* Copyright (c) 2015, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <odph_debug.h>
#include <odp_api.h>
#include <odp/helper/linux/pthread.h>
#define NUMBER_WORKERS 16
static void *worker_fn(void *arg ODPH_UNUSED)
{
/* depend on the odp helper to call odp_init_local */
printf("Worker thread on CPU %d\n", odp_cpu_id());
/* depend on the odp helper to call odp_term_local */
return NULL;
}
/* Create additional dataplane threads */
int main(int argc ODPH_UNUSED, char *argv[] ODPH_UNUSED)
{
odph_linux_pthread_t thread_tbl[NUMBER_WORKERS];
odp_cpumask_t cpu_mask;
int num_workers;
int cpu;
char cpumaskstr[ODP_CPUMASK_STR_SIZE];
odp_instance_t instance;
odph_linux_thr_params_t thr_params;
if (odp_init_global(&instance, NULL, NULL)) {
ODPH_ERR("Error: ODP global init failed.\n");
exit(EXIT_FAILURE);
}
if (odp_init_local(instance, ODP_THREAD_CONTROL)) {
ODPH_ERR("Error: ODP local init failed.\n");
exit(EXIT_FAILURE);
}
/* discover how many threads this system can support */
num_workers = odp_cpumask_default_worker(&cpu_mask, NUMBER_WORKERS);
if (num_workers < NUMBER_WORKERS) {
printf("System can only support %d threads and not the %d requested\n",
num_workers, NUMBER_WORKERS);
}
/* generate a summary for the user */
(void)odp_cpumask_to_str(&cpu_mask, cpumaskstr, sizeof(cpumaskstr));
printf("default cpu mask: %s\n", cpumaskstr);
printf("default num worker threads: %i\n", num_workers);
cpu = odp_cpumask_first(&cpu_mask);
printf("the first CPU: %i\n", cpu);
/* reserve cpu 0 for the control plane so remove it from
* the default mask */
odp_cpumask_clr(&cpu_mask, 0);
num_workers = odp_cpumask_count(&cpu_mask);
(void)odp_cpumask_to_str(&cpu_mask, cpumaskstr, sizeof(cpumaskstr));
printf("new cpu mask: %s\n", cpumaskstr);
printf("new num worker threads: %i\n\n", num_workers);
memset(&thr_params, 0, sizeof(thr_params));
thr_params.start = worker_fn;
thr_params.arg = NULL;
thr_params.thr_type = ODP_THREAD_WORKER;
thr_params.instance = instance;
odph_linux_pthread_create(&thread_tbl[0], &cpu_mask, &thr_params);
odph_linux_pthread_join(thread_tbl, num_workers);
if (odp_term_local()) {
ODPH_ERR("Error: ODP local term failed.\n");
exit(EXIT_FAILURE);
}
if (odp_term_global(instance)) {
ODPH_ERR("Error: ODP global term failed.\n");
exit(EXIT_FAILURE);
}
return 0;
}
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