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/* Copyright (c) 2015, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <test_debug.h>
#include <odp_api.h>
#include <odp/helper/linux.h>
#define NUMBER_WORKERS 16 /* 0 = max */
static void *worker_fn(void *arg TEST_UNUSED)
{
/* depend on the odp helper to call odp_init_local */
printf("Worker thread on CPU %d\n", odp_cpu_id());
return 0;
}
/* Create additional dataplane processes */
int main(int argc TEST_UNUSED, char *argv[] TEST_UNUSED)
{
odp_cpumask_t cpu_mask;
int num_workers;
int cpu;
char cpumaskstr[ODP_CPUMASK_STR_SIZE];
int ret;
odph_linux_process_t proc[NUMBER_WORKERS];
if (odp_init_global(NULL, NULL)) {
LOG_ERR("Error: ODP global init failed.\n");
exit(EXIT_FAILURE);
}
if (odp_init_local(ODP_THREAD_CONTROL)) {
LOG_ERR("Error: ODP local init failed.\n");
exit(EXIT_FAILURE);
}
/* discover how many processes 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 processes 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 processes: %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 processes: %i\n\n", num_workers);
/* Fork worker processes */
ret = odph_linux_process_fork_n(proc, &cpu_mask);
if (ret < 0) {
LOG_ERR("Fork workers failed %i\n", ret);
return -1;
}
if (ret == 0) {
/* Child process */
worker_fn(NULL);
} else {
/* Parent process */
odph_linux_process_wait_n(proc, num_workers);
if (odp_term_global()) {
LOG_ERR("Error: ODP global term failed.\n");
exit(EXIT_FAILURE);
}
}
return 0;
}
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