examples/qos_sched/args.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <locale.h>
#include <unistd.h>
#include <limits.h>
#include <getopt.h>

#include <rte_log.h>
#include <rte_eal.h>
#include <rte_lcore.h>
#include <rte_string_fns.h>

#include "main.h"

#define APP_NAME "qos_sched"
#define MAX_OPT_VALUES 8
#define SYS_CPU_DIR "/sys/devices/system/cpu/cpu%u/topology/"

static uint32_t app_master_core = 1;
static uint32_t app_numa_mask;
static uint64_t app_used_core_mask = 0;
static uint64_t app_used_port_mask = 0;
static uint64_t app_used_rx_port_mask = 0;
static uint64_t app_used_tx_port_mask = 0;


static const char usage[] =
    "                                                                               \n"
    "    %s <APP PARAMS>                                                            \n"
    "                                                                               \n"
    "Application mandatory parameters:                                              \n"
    "    --pfc \"RX PORT, TX PORT, RX LCORE, WT LCORE\" : Packet flow configuration \n"
    "           multiple pfc can be configured in command line                      \n"
    "                                                                               \n"
    "Application optional parameters:                                               \n"
    "    -i      : run in interactive mode (default value is %u)                    \n"
    "    --mst I : master core index (default value is %u)                          \n"
    "    --rsz \"A, B, C\" :   Ring sizes                                           \n"
    "           A = Size (in number of buffer descriptors) of each of the NIC RX    \n"
    "               rings read by the I/O RX lcores (default value is %u)           \n"
    "           B = Size (in number of elements) of each of the SW rings used by the\n"
    "               I/O RX lcores to send packets to worker lcores (default value is\n"
    "               %u)                                                             \n"
    "           C = Size (in number of buffer descriptors) of each of the NIC TX    \n"
    "               rings written by worker lcores (default value is %u)            \n"
    "    --bsz \"A, B, C, D\": Burst sizes                                          \n"
    "           A = I/O RX lcore read burst size from NIC RX (default value is %u)  \n"
    "           B = I/O RX lcore write burst size to output SW rings,               \n"
    "               Worker lcore read burst size from input SW rings,               \n"
    "               QoS enqueue size (default value is %u)                          \n"
    "           C = QoS dequeue size (default value is %u)                          \n"
    "           D = Worker lcore write burst size to NIC TX (default value is %u)   \n"
    "    --msz M : Mempool size (in number of mbufs) for each pfc (default %u)      \n"
    "    --rth \"A, B, C\" :   RX queue threshold parameters                        \n"
    "           A = RX prefetch threshold (default value is %u)                     \n"
    "           B = RX host threshold (default value is %u)                         \n"
    "           C = RX write-back threshold (default value is %u)                   \n"
    "    --tth \"A, B, C\" :   TX queue threshold parameters                        \n"
    "           A = TX prefetch threshold (default value is %u)                     \n"
    "           B = TX host threshold (default value is %u)                         \n"
    "           C = TX write-back threshold (default value is %u)                   \n"
    "    --cfg FILE : profile configuration to load                                 \n"
;

/* display usage */
static void
app_usage(const char *prgname)
{
    printf(usage, prgname, APP_INTERACTIVE_DEFAULT, app_master_core,
        APP_RX_DESC_DEFAULT, APP_RING_SIZE, APP_TX_DESC_DEFAULT,
        MAX_PKT_RX_BURST, PKT_ENQUEUE, PKT_DEQUEUE,
        MAX_PKT_TX_BURST, NB_MBUF,
        RX_PTHRESH, RX_HTHRESH, RX_WTHRESH,
        TX_PTHRESH, TX_HTHRESH, TX_WTHRESH
        );
}

static inline int str_is(const char *str, const char *is)
{
    return strcmp(str, is) == 0;
}

/* returns core mask used by DPDK */
static uint64_t
app_eal_core_mask(void)
{
    uint64_t cm = 0;
    uint32_t i;

    for (i = 0; i < APP_MAX_LCORE; i++) {
        if (rte_lcore_has_role(i, ROLE_RTE))
            cm |= (1ULL << i);
    }

    cm |= (1ULL << rte_get_master_lcore());

    return cm;
}


/* returns total number of cores presented in a system */
static uint32_t
app_cpu_core_count(void)
{
    int i, len;
    char path[PATH_MAX];
    uint32_t ncores = 0;

    for (i = 0; i < APP_MAX_LCORE; i++) {
        len = snprintf(path, sizeof(path), SYS_CPU_DIR, i);
        if (len <= 0 || (unsigned)len >= sizeof(path))
            continue;

        if (access(path, F_OK) == 0)
            ncores++;
    }

    return ncores;
}

/* returns:
     number of values parsed
    -1 in case of error
*/
static int
app_parse_opt_vals(const char *conf_str, char separator, uint32_t n_vals, uint32_t *opt_vals)
{
    char *string;
    int i, n_tokens;
    char *tokens[MAX_OPT_VALUES];

    if (conf_str == NULL || opt_vals == NULL || n_vals == 0 || n_vals > MAX_OPT_VALUES)
        return -1;

    /* duplicate configuration string before splitting it to tokens */
    string = strdup(conf_str);
    if (string == NULL)
        return -1;

    n_tokens = rte_strsplit(string, strnlen(string, 32), tokens, n_vals, separator);

    if (n_tokens > MAX_OPT_VALUES)
        return -1;

    for (i = 0; i < n_tokens; i++)
        opt_vals[i] = (uint32_t)atol(tokens[i]);

    free(string);

    return n_tokens;
}

static int
app_parse_ring_conf(const char *conf_str)
{
    int ret;
    uint32_t vals[3];

    ret = app_parse_opt_vals(conf_str, ',', 3, vals);
    if (ret != 3)
        return ret;

    ring_conf.rx_size = vals[0];
    ring_conf.ring_size = vals[1];
    ring_conf.tx_size = vals[2];

    return 0;
}

static int
app_parse_rth_conf(const char *conf_str)
{
    int ret;
    uint32_t vals[3];

    ret = app_parse_opt_vals(conf_str, ',', 3, vals);
    if (ret != 3)
        return ret;

    rx_thresh.pthresh = (uint8_t)vals[0];
    rx_thresh.hthresh = (uint8_t)vals[1];
    rx_thresh.wthresh = (uint8_t)vals[2];

    return 0;
}

static int
app_parse_tth_conf(const char *conf_str)
{
    int ret;
    uint32_t vals[3];

    ret = app_parse_opt_vals(conf_str, ',', 3, vals);
    if (ret != 3)
        return ret;

    tx_thresh.pthresh = (uint8_t)vals[0];
    tx_thresh.hthresh = (uint8_t)vals[1];
    tx_thresh.wthresh = (uint8_t)vals[2];

    return 0;
}

static int
app_parse_flow_conf(const char *conf_str)
{
    int ret;
    uint32_t vals[5];
    struct flow_conf *pconf;
    uint64_t mask;

    memset(vals, 0, sizeof(vals));
    ret = app_parse_opt_vals(conf_str, ',', 6, vals);
    if (ret < 4 || ret > 5)
        return ret;

    pconf = &qos_conf[nb_pfc];

    pconf->rx_port = vals[0];
    pconf->tx_port = vals[1];
    pconf->rx_core = (uint8_t)vals[2];
    pconf->wt_core = (uint8_t)vals[3];
    if (ret == 5)
        pconf->tx_core = (uint8_t)vals[4];
    else
        pconf->tx_core = pconf->wt_core;

    if (pconf->rx_core == pconf->wt_core) {
        RTE_LOG(ERR, APP, "pfc %u: rx thread and worker thread cannot share same core\n", nb_pfc);
        return -1;
    }

    if (pconf->rx_port >= RTE_MAX_ETHPORTS) {
        RTE_LOG(ERR, APP, "pfc %u: invalid rx port %"PRIu16" index\n",
                nb_pfc, pconf->rx_port);
        return -1;
    }
    if (pconf->tx_port >= RTE_MAX_ETHPORTS) {
        RTE_LOG(ERR, APP, "pfc %u: invalid tx port %"PRIu16" index\n",
                nb_pfc, pconf->tx_port);
        return -1;
    }

    mask = 1lu << pconf->rx_port;
    if (app_used_rx_port_mask & mask) {
        RTE_LOG(ERR, APP, "pfc %u: rx port %"PRIu16" is used already\n",
                nb_pfc, pconf->rx_port);
        return -1;
    }
    app_used_rx_port_mask |= mask;
    app_used_port_mask |= mask;

    mask = 1lu << pconf->tx_port;
    if (app_used_tx_port_mask & mask) {
        RTE_LOG(ERR, APP, "pfc %u: port %"PRIu16" is used already\n",
                nb_pfc, pconf->tx_port);
        return -1;
    }
    app_used_tx_port_mask |= mask;
    app_used_port_mask |= mask;

    mask = 1lu << pconf->rx_core;
    app_used_core_mask |= mask;

    mask = 1lu << pconf->wt_core;
    app_used_core_mask |= mask;

    mask = 1lu << pconf->tx_core;
    app_used_core_mask |= mask;

    nb_pfc++;

    return 0;
}

static int
app_parse_burst_conf(const char *conf_str)
{
    int ret;
    uint32_t vals[4];

    ret = app_parse_opt_vals(conf_str, ',', 4, vals);
    if (ret != 4)
        return ret;

    burst_conf.rx_burst    = (uint16_t)vals[0];
    burst_conf.ring_burst  = (uint16_t)vals[1];
    burst_conf.qos_dequeue = (uint16_t)vals[2];
    burst_conf.tx_burst    = (uint16_t)vals[3];

    return 0;
}

/*
 * Parses the argument given in the command line of the application,
 * calculates mask for used cores and initializes EAL with calculated core mask
 */
int
app_parse_args(int argc, char **argv)
{
    int opt, ret;
    int option_index;
    const char *optname;
    char *prgname = argv[0];
    uint32_t i, nb_lcores;

    static struct option lgopts[] = {
        { "pfc", 1, 0, 0 },
        { "mst", 1, 0, 0 },
        { "rsz", 1, 0, 0 },
        { "bsz", 1, 0, 0 },
        { "msz", 1, 0, 0 },
        { "rth", 1, 0, 0 },
        { "tth", 1, 0, 0 },
        { "cfg", 1, 0, 0 },
        { NULL,  0, 0, 0 }
    };

    /* initialize EAL first */
    ret = rte_eal_init(argc, argv);
    if (ret < 0)
        return -1;

    argc -= ret;
    argv += ret;

    /* set en_US locale to print big numbers with ',' */
    setlocale(LC_NUMERIC, "en_US.utf-8");

    while ((opt = getopt_long(argc, argv, "i",
        lgopts, &option_index)) != EOF) {

            switch (opt) {
            case 'i':
                printf("Interactive-mode selected\n");
                interactive = 1;
                break;
            /* long options */
            case 0:
                optname = lgopts[option_index].name;
                if (str_is(optname, "pfc")) {
                    ret = app_parse_flow_conf(optarg);
                    if (ret) {
                        RTE_LOG(ERR, APP, "Invalid pipe configuration %s\n", optarg);
                        return -1;
                    }
                    break;
                }
                if (str_is(optname, "mst")) {
                    app_master_core = (uint32_t)atoi(optarg);
                    break;
                }
                if (str_is(optname, "rsz")) {
                    ret = app_parse_ring_conf(optarg);
                    if (ret) {
                        RTE_LOG(ERR, APP, "Invalid ring configuration %s\n", optarg);
                        return -1;
                    }
                    break;
                }
                if (str_is(optname, "bsz")) {
                    ret = app_parse_burst_conf(optarg);
                    if (ret) {
                        RTE_LOG(ERR, APP, "Invalid burst configuration %s\n", optarg);
                        return -1;
                    }
                    break;
                }
                if (str_is(optname, "msz")) {
                    mp_size = atoi(optarg);
                    if (mp_size <= 0) {
                        RTE_LOG(ERR, APP, "Invalid mempool size %s\n", optarg);
                        return -1;
                    }
                    break;
                }
                if (str_is(optname, "rth")) {
                    ret = app_parse_rth_conf(optarg);
                    if (ret) {
                        RTE_LOG(ERR, APP, "Invalid RX threshold configuration %s\n", optarg);
                        return -1;
                    }
                    break;
                }
                if (str_is(optname, "tth")) {
                    ret = app_parse_tth_conf(optarg);
                    if (ret) {
                        RTE_LOG(ERR, APP, "Invalid TX threshold configuration %s\n", optarg);
                        return -1;
                    }
                    break;
                }
                if (str_is(optname, "cfg")) {
                    cfg_profile = optarg;
                    break;
                }
                break;

            default:
                app_usage(prgname);
                return -1;
            }
    }

    /* check master core index validity */
    for(i = 0; i <= app_master_core; i++) {
        if (app_used_core_mask & (1u << app_master_core)) {
            RTE_LOG(ERR, APP, "Master core index is not configured properly\n");
            app_usage(prgname);
            return -1;
        }
    }
    app_used_core_mask |= 1u << app_master_core;

    if ((app_used_core_mask != app_eal_core_mask()) ||
            (app_master_core != rte_get_master_lcore())) {
        RTE_LOG(ERR, APP, "EAL core mask not configured properly, must be %" PRIx64
                " instead of %" PRIx64 "\n" , app_used_core_mask, app_eal_core_mask());
        return -1;
    }

    if (nb_pfc == 0) {
        RTE_LOG(ERR, APP, "Packet flow not configured!\n");
        app_usage(prgname);
        return -1;
    }

    /* sanity check for cores assignment */
    nb_lcores = app_cpu_core_count();

    for(i = 0; i < nb_pfc; i++) {
        if (qos_conf[i].rx_core >= nb_lcores) {
            RTE_LOG(ERR, APP, "pfc %u: invalid RX lcore index %u\n", i + 1,
                    qos_conf[i].rx_core);
            return -1;
        }
        if (qos_conf[i].wt_core >= nb_lcores) {
            RTE_LOG(ERR, APP, "pfc %u: invalid WT lcore index %u\n", i + 1,
                    qos_conf[i].wt_core);
            return -1;
        }
        uint32_t rx_sock = rte_lcore_to_socket_id(qos_conf[i].rx_core);
        uint32_t wt_sock = rte_lcore_to_socket_id(qos_conf[i].wt_core);
        if (rx_sock != wt_sock) {
            RTE_LOG(ERR, APP, "pfc %u: RX and WT must be on the same socket\n", i + 1);
            return -1;
        }
        app_numa_mask |= 1 << rte_lcore_to_socket_id(qos_conf[i].rx_core);
    }

    return 0;
}