rmax_set_affinity_main.c

Go to the documentation of this file.

/*
 * Copyright (c) 2022-2024 NVIDIA CORPORATION AND AFFILIATES.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice, this list of
 *       conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used
 *       to endorse or promote products derived from this software without specific prior written
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
 
#include <stdbool.h>
#include <stdlib.h>
 
#include <doca_log.h>
 
#include "rmax_common.h"
 
DOCA_LOG_REGISTER(RMAX_SET_AFFINITY::MAIN);
 
/* Sample's logic */
doca_error_t set_affinity_sample(unsigned core);
 
struct app_config {
    unsigned cpu_core; /* CPU core to set internal thread affinity to */
};
 
static doca_error_t cpu_core_callback(void *param, void *config)
{
    struct app_config *cfg = (struct app_config *)config;
    int cpu = *(int *)param;
 
    if (cpu < 0) {
        DOCA_LOG_ERR("Invalid CPU core number: %d", cpu);
        return DOCA_ERROR_INVALID_VALUE;
    }
    cfg->cpu_core = cpu;
    return DOCA_SUCCESS;
}
 
doca_error_t register_argp_params(void)
{
    doca_error_t result;
    struct doca_argp_param *cpu_param;
 
    /* --cpu parameter */
    result = doca_argp_param_create(&cpu_param);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create ARGP param: %s", doca_error_get_name(result));
        return result;
    }
    doca_argp_param_set_short_name(cpu_param, "c");
    doca_argp_param_set_long_name(cpu_param, "cpu");
    doca_argp_param_set_description(cpu_param, "CPU core to set affinity to");
    doca_argp_param_set_callback(cpu_param, cpu_core_callback);
    doca_argp_param_set_type(cpu_param, DOCA_ARGP_TYPE_INT);
    result = doca_argp_register_param(cpu_param);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to register program param: %s", doca_error_get_name(result));
        return result;
    }
 
    return DOCA_SUCCESS;
}
 
/*
 * Sample main function
 *
 * @argc [in]: command line arguments size
 * @argv [in]: array of command line arguments
 * @return: EXIT_SUCCESS on success and EXIT_FAILURE otherwise
 */
int main(int argc, char **argv)
{
    doca_error_t result;
    struct doca_log_backend *sdk_log;
    int exit_status = EXIT_FAILURE;
    struct app_config config;
 
    /* Register a logger backend */
    result = doca_log_backend_create_standard();
    if (result != DOCA_SUCCESS)
        goto sample_exit;
 
    /* Register a logger backend for internal SDK errors and warnings */
    result = doca_log_backend_create_with_file_sdk(stderr, &sdk_log);
    if (result != DOCA_SUCCESS)
        goto sample_exit;
    result = doca_log_backend_set_sdk_level(sdk_log, DOCA_LOG_LEVEL_WARNING);
    if (result != DOCA_SUCCESS)
        goto sample_exit;
 
    DOCA_LOG_INFO("Starting the sample");
    config.cpu_core = 0;
 
    result = doca_argp_init(NULL, &config);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init ARGP resources: %s", doca_error_get_name(result));
        goto sample_exit;
    }
    if (register_argp_params() != DOCA_SUCCESS)
        goto sample_exit;
    result = doca_argp_start(argc, argv);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to parse application command line: %s", doca_error_get_name(result));
        goto sample_exit;
    }
 
    result = set_affinity_sample(config.cpu_core);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("set_affinity() encountered an error: %s", doca_error_get_descr(result));
        goto sample_exit;
    }
 
    exit_status = EXIT_SUCCESS;
 
sample_exit:
    doca_argp_destroy();
    if (exit_status == EXIT_SUCCESS)
        DOCA_LOG_INFO("Sample finished successfully");
    else
        DOCA_LOG_INFO("Sample finished with errors");
    return exit_status;
}