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examples/distributor: new sample app

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A new sample app that shows the usage of the distributor library. This
app works as follows:

* An RX thread runs which pulls packets from each ethernet port in turn
  and passes those packets to worker using a distributor component.
* The workers take the packets in turn, and determine the output port
  for those packets using basic l2forwarding doing an xor on the source
  port id.
* The RX thread takes the returned packets from the workers and enqueue
  those packets into an rte_ring structure.
* A TX thread pulls the packets off the rte_ring structure and then
  sends each packet out the output port specified previously by the worker
* Command-line option support provided only for portmask.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
This commit is contained in:
Reshma Pattan 2014-11-03 15:49:44 +00:00 committed by Thomas Monjalon
parent 2e84937377
commit 07db4a9750
4 changed files with 710 additions and 0 deletions
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1
examples/Makefile
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@ -66,5 +66,6 @@ DIRS-$(CONFIG_RTE_LIBRTE_VHOST) += vhost
DIRS-$(CONFIG_RTE_LIBRTE_XEN_DOM0) += vhost_xen
DIRS-y += vmdq
DIRS-y += vmdq_dcb
DIRS-$(CONFIG_RTE_LIBRTE_DISTRIBUTOR) += distributor
include $(RTE_SDK)/mk/rte.extsubdir.mk

57
examples/distributor/Makefile Normal file
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@ -0,0 +1,57 @@
# BSD LICENSE
#
# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
# 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 Intel 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 THE COPYRIGHT
# OWNER OR CONTRIBUTORS 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 TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ifeq ($(RTE_SDK),)
$(error "Please define RTE_SDK environment variable")
endif
# Default target, can be overriden by command line or environment
RTE_TARGET ?= x86_64-native-linuxapp-gcc
include $(RTE_SDK)/mk/rte.vars.mk
# binary name
APP = distributor_app
# all source are stored in SRCS-y
SRCS-y := main.c
CFLAGS += $(WERROR_FLAGS)
# workaround for a gcc bug with noreturn attribute
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603
ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
CFLAGS_main.o += -Wno-return-type
endif
EXTRA_CFLAGS += -O3 -Wfatal-errors
include $(RTE_SDK)/mk/rte.extapp.mk

606
examples/distributor/main.c Normal file
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@ -0,0 +1,606 @@
/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* 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 Intel 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 THE COPYRIGHT
* OWNER OR CONTRIBUTORS 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 TORT
* (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 <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include <signal.h>
#include <getopt.h>
#include <rte_eal.h>
#include <rte_ethdev.h>
#include <rte_cycles.h>
#include <rte_malloc.h>
#include <rte_debug.h>
#include <rte_distributor.h>
#include "main.h"
#define RX_RING_SIZE 256
#define TX_RING_SIZE 512
#define NUM_MBUFS ((64*1024)-1)
#define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
#define MBUF_CACHE_SIZE 250
#define BURST_SIZE 32
#define RTE_RING_SZ 1024
/* uncommnet below line to enable debug logs */
/* #define DEBUG */
#ifdef DEBUG
#define LOG_LEVEL RTE_LOG_DEBUG
#define LOG_DEBUG(log_type, fmt, args...) do { \
RTE_LOG(DEBUG, log_type, fmt, ##args) \
} while (0)
#else
#define LOG_LEVEL RTE_LOG_INFO
#define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
#endif
#define RTE_LOGTYPE_DISTRAPP RTE_LOGTYPE_USER1
/* mask of enabled ports */
static uint32_t enabled_port_mask;
volatile uint8_t quit_signal;
volatile uint8_t quit_signal_rx;
static volatile struct app_stats {
struct {
uint64_t rx_pkts;
uint64_t returned_pkts;
uint64_t enqueued_pkts;
} rx __rte_cache_aligned;
struct {
uint64_t dequeue_pkts;
uint64_t tx_pkts;
} tx __rte_cache_aligned;
} app_stats;
static const struct rte_eth_conf port_conf_default = {
.rxmode = {
.mq_mode = ETH_MQ_RX_RSS,
.max_rx_pkt_len = ETHER_MAX_LEN,
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
},
.rx_adv_conf = {
.rss_conf = {
.rss_hf = ETH_RSS_IPV4 | ETH_RSS_IPV6 |
ETH_RSS_IPV4_TCP | ETH_RSS_IPV4_UDP |
ETH_RSS_IPV6_TCP | ETH_RSS_IPV6_UDP,
}
},
};
struct output_buffer {
unsigned count;
struct rte_mbuf *mbufs[BURST_SIZE];
};
/*
* Initialises a given port using global settings and with the rx buffers
* coming from the mbuf_pool passed as parameter
*/
static inline int
port_init(uint8_t port, struct rte_mempool *mbuf_pool)
{
struct rte_eth_conf port_conf = port_conf_default;
const uint16_t rxRings = 1, txRings = rte_lcore_count() - 1;
int retval;
uint16_t q;
if (port >= rte_eth_dev_count())
return -1;
retval = rte_eth_dev_configure(port, rxRings, txRings, &port_conf);
if (retval != 0)
return retval;
for (q = 0; q < rxRings; q++) {
retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
rte_eth_dev_socket_id(port),
NULL, mbuf_pool);
if (retval < 0)
return retval;
}
for (q = 0; q < txRings; q++) {
retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
rte_eth_dev_socket_id(port),
NULL);
if (retval < 0)
return retval;
}
retval = rte_eth_dev_start(port);
if (retval < 0)
return retval;
struct rte_eth_link link;
rte_eth_link_get_nowait(port, &link);
if (!link.link_status) {
sleep(1);
rte_eth_link_get_nowait(port, &link);
}
if (!link.link_status) {
printf("Link down on port %"PRIu8"\n", port);
return 0;
}
struct ether_addr addr;
rte_eth_macaddr_get(port, &addr);
printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
(unsigned)port,
addr.addr_bytes[0], addr.addr_bytes[1],
addr.addr_bytes[2], addr.addr_bytes[3],
addr.addr_bytes[4], addr.addr_bytes[5]);
rte_eth_promiscuous_enable(port);
return 0;
}
struct lcore_params {
unsigned worker_id;
struct rte_distributor *d;
struct rte_ring *r;
struct rte_mempool *mem_pool;
};
static void
quit_workers(struct rte_distributor *d, struct rte_mempool *p)
{
const unsigned num_workers = rte_lcore_count() - 2;
unsigned i;
struct rte_mbuf *bufs[num_workers];
rte_mempool_get_bulk(p, (void *)bufs, num_workers);
for (i = 0; i < num_workers; i++)
bufs[i]->hash.rss = i << 1;
rte_distributor_process(d, bufs, num_workers);
rte_mempool_put_bulk(p, (void *)bufs, num_workers);
}
static int
lcore_rx(struct lcore_params *p)
{
struct rte_distributor *d = p->d;
struct rte_mempool *mem_pool = p->mem_pool;
struct rte_ring *r = p->r;
const uint8_t nb_ports = rte_eth_dev_count();
const int socket_id = rte_socket_id();
uint8_t port;
for (port = 0; port < nb_ports; port++) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << port)) == 0)
continue;
if (rte_eth_dev_socket_id(port) > 0 &&
rte_eth_dev_socket_id(port) != socket_id)
printf("WARNING, port %u is on remote NUMA node to "
"RX thread.\n\tPerformance will not "
"be optimal.\n", port);
}
printf("\nCore %u doing packet RX.\n", rte_lcore_id());
port = 0;
while (!quit_signal_rx) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << port)) == 0) {
if (++port == nb_ports)
port = 0;
continue;
}
struct rte_mbuf *bufs[BURST_SIZE*2];
const uint16_t nb_rx = rte_eth_rx_burst(port, 0, bufs,
BURST_SIZE);
app_stats.rx.rx_pkts += nb_rx;
rte_distributor_process(d, bufs, nb_rx);
const uint16_t nb_ret = rte_distributor_returned_pkts(d,
bufs, BURST_SIZE*2);
app_stats.rx.returned_pkts += nb_ret;
if (unlikely(nb_ret == 0))
continue;
uint16_t sent = rte_ring_enqueue_burst(r, (void *)bufs, nb_ret);
app_stats.rx.enqueued_pkts += sent;
if (unlikely(sent < nb_ret)) {
LOG_DEBUG(DISTRAPP, "%s:Packet loss due to full ring\n", __func__);
while (sent < nb_ret)
rte_pktmbuf_free(bufs[sent++]);
}
if (++port == nb_ports)
port = 0;
}
rte_distributor_process(d, NULL, 0);
/* flush distributor to bring to known state */
rte_distributor_flush(d);
/* set worker & tx threads quit flag */
quit_signal = 1;
/*
* worker threads may hang in get packet as
* distributor process is not running, just make sure workers
* get packets till quit_signal is actually been
* received and they gracefully shutdown
*/
quit_workers(d, mem_pool);
/* rx thread should quit at last */
return 0;
}
static inline void
flush_one_port(struct output_buffer *outbuf, uint8_t outp)
{
unsigned nb_tx = rte_eth_tx_burst(outp, 0, outbuf->mbufs,
outbuf->count);
app_stats.tx.tx_pkts += nb_tx;
if (unlikely(nb_tx < outbuf->count)) {
LOG_DEBUG(DISTRAPP, "%s:Packet loss with tx_burst\n", __func__);
do {
rte_pktmbuf_free(outbuf->mbufs[nb_tx]);
} while (++nb_tx < outbuf->count);
}
outbuf->count = 0;
}
static inline void
flush_all_ports(struct output_buffer *tx_buffers, uint8_t nb_ports)
{
uint8_t outp;
for (outp = 0; outp < nb_ports; outp++) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << outp)) == 0)
continue;
if (tx_buffers[outp].count == 0)
continue;
flush_one_port(&tx_buffers[outp], outp);
}
}
static int
lcore_tx(struct rte_ring *in_r)
{
static struct output_buffer tx_buffers[RTE_MAX_ETHPORTS];
const uint8_t nb_ports = rte_eth_dev_count();
const int socket_id = rte_socket_id();
uint8_t port;
for (port = 0; port < nb_ports; port++) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << port)) == 0)
continue;
if (rte_eth_dev_socket_id(port) > 0 &&
rte_eth_dev_socket_id(port) != socket_id)
printf("WARNING, port %u is on remote NUMA node to "
"TX thread.\n\tPerformance will not "
"be optimal.\n", port);
}
printf("\nCore %u doing packet TX.\n", rte_lcore_id());
while (!quit_signal) {
for (port = 0; port < nb_ports; port++) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << port)) == 0)
continue;
struct rte_mbuf *bufs[BURST_SIZE];
const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
(void *)bufs, BURST_SIZE);
app_stats.tx.dequeue_pkts += nb_rx;
/* if we get no traffic, flush anything we have */
if (unlikely(nb_rx == 0)) {
flush_all_ports(tx_buffers, nb_ports);
continue;
}
/* for traffic we receive, queue it up for transmit */
uint16_t i;
_mm_prefetch(bufs[0], 0);
_mm_prefetch(bufs[1], 0);
_mm_prefetch(bufs[2], 0);
for (i = 0; i < nb_rx; i++) {
struct output_buffer *outbuf;
uint8_t outp;
_mm_prefetch(bufs[i + 3], 0);
/*
* workers should update in_port to hold the
* output port value
*/
outp = bufs[i]->port;
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << outp)) == 0)
continue;
outbuf = &tx_buffers[outp];
outbuf->mbufs[outbuf->count++] = bufs[i];
if (outbuf->count == BURST_SIZE)
flush_one_port(outbuf, outp);
}
}
}
return 0;
}
static void
int_handler(int sig_num)
{
printf("Exiting on signal %d\n", sig_num);
/* set quit flag for rx thread to exit */
quit_signal_rx = 1;
}
static void
print_stats(void)
{
struct rte_eth_stats eth_stats;
unsigned i;
printf("\nRX thread stats:\n");
printf(" - Received: %"PRIu64"\n", app_stats.rx.rx_pkts);
printf(" - Processed: %"PRIu64"\n", app_stats.rx.returned_pkts);
printf(" - Enqueued: %"PRIu64"\n", app_stats.rx.enqueued_pkts);
printf("\nTX thread stats:\n");
printf(" - Dequeued: %"PRIu64"\n", app_stats.tx.dequeue_pkts);
printf(" - Transmitted: %"PRIu64"\n", app_stats.tx.tx_pkts);
for (i = 0; i < rte_eth_dev_count(); i++) {
rte_eth_stats_get(i, &eth_stats);
printf("\nPort %u stats:\n", i);
printf(" - Pkts in: %"PRIu64"\n", eth_stats.ipackets);
printf(" - Pkts out: %"PRIu64"\n", eth_stats.opackets);
printf(" - In Errs: %"PRIu64"\n", eth_stats.ierrors);
printf(" - Out Errs: %"PRIu64"\n", eth_stats.oerrors);
printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
}
}
static int
lcore_worker(struct lcore_params *p)
{
struct rte_distributor *d = p->d;
const unsigned id = p->worker_id;
/*
* for single port, xor_val will be zero so we won't modify the output
* port, otherwise we send traffic from 0 to 1, 2 to 3, and vice versa
*/
const unsigned xor_val = (rte_eth_dev_count() > 1);
struct rte_mbuf *buf = NULL;
printf("\nCore %u acting as worker core.\n", rte_lcore_id());
while (!quit_signal) {
buf = rte_distributor_get_pkt(d, id, buf);
buf->port ^= xor_val;
}
return 0;
}
/* display usage */
static void
print_usage(const char *prgname)
{
printf("%s [EAL options] -- -p PORTMASK\n"
" -p PORTMASK: hexadecimal bitmask of ports to configure\n",
prgname);
}
static int
parse_portmask(const char *portmask)
{
char *end = NULL;
unsigned long pm;
/* parse hexadecimal string */
pm = strtoul(portmask, &end, 16);
if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
return -1;
if (pm == 0)
return -1;
return pm;
}
/* Parse the argument given in the command line of the application */
static int
parse_args(int argc, char **argv)
{
int opt;
char **argvopt;
int option_index;
char *prgname = argv[0];
static struct option lgopts[] = {
{NULL, 0, 0, 0}
};
argvopt = argv;
while ((opt = getopt_long(argc, argvopt, "p:",
lgopts, &option_index)) != EOF) {
switch (opt) {
/* portmask */
case 'p':
enabled_port_mask = parse_portmask(optarg);
if (enabled_port_mask == 0) {
printf("invalid portmask\n");
print_usage(prgname);
return -1;
}
break;
default:
print_usage(prgname);
return -1;
}
}
if (optind <= 1) {
print_usage(prgname);
return -1;
}
argv[optind-1] = prgname;
optind = 0; /* reset getopt lib */
return 0;
}
/* Main function, does initialization and calls the per-lcore functions */
int
MAIN(int argc, char *argv[])
{
struct rte_mempool *mbuf_pool;
struct rte_distributor *d;
struct rte_ring *output_ring;
unsigned lcore_id, worker_id = 0;
unsigned nb_ports;
uint8_t portid;
uint8_t nb_ports_available;
/* catch ctrl-c so we can print on exit */
signal(SIGINT, int_handler);
/* init EAL */
int ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
argc -= ret;
argv += ret;
/* parse application arguments (after the EAL ones) */
ret = parse_args(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Invalid distributor parameters\n");
if (rte_lcore_count() < 3)
rte_exit(EXIT_FAILURE, "Error, This application needs at "
"least 3 logical cores to run:\n"
"1 lcore for packet RX and distribution\n"
"1 lcore for packet TX\n"
"and at least 1 lcore for worker threads\n");
nb_ports = rte_eth_dev_count();
if (nb_ports == 0)
rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
if (nb_ports != 1 && (nb_ports & 1))
rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
"when using a single port\n");
mbuf_pool = rte_mempool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
MBUF_SIZE, MBUF_CACHE_SIZE,
sizeof(struct rte_pktmbuf_pool_private),
rte_pktmbuf_pool_init, NULL,
rte_pktmbuf_init, NULL,
rte_socket_id(), 0);
if (mbuf_pool == NULL)
rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
nb_ports_available = nb_ports;
/* initialize all ports */
for (portid = 0; portid < nb_ports; portid++) {
/* skip ports that are not enabled */
if ((enabled_port_mask & (1 << portid)) == 0) {
printf("\nSkipping disabled port %d\n", portid);
nb_ports_available--;
continue;
}
/* init port */
printf("Initializing port %u... done\n", (unsigned) portid);
if (port_init(portid, mbuf_pool) != 0)
rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
portid);
}
if (!nb_ports_available) {
rte_exit(EXIT_FAILURE,
"All available ports are disabled. Please set portmask.\n");
}
d = rte_distributor_create("PKT_DIST", rte_socket_id(),
rte_lcore_count() - 2);
if (d == NULL)
rte_exit(EXIT_FAILURE, "Cannot create distributor\n");
/*
* scheduler ring is read only by the transmitter core, but written to
* by multiple threads
*/
output_ring = rte_ring_create("Output_ring", RTE_RING_SZ,
rte_socket_id(), RING_F_SC_DEQ);
if (output_ring == NULL)
rte_exit(EXIT_FAILURE, "Cannot create output ring\n");
RTE_LCORE_FOREACH_SLAVE(lcore_id) {
if (worker_id == rte_lcore_count() - 2)
rte_eal_remote_launch((lcore_function_t *)lcore_tx,
output_ring, lcore_id);
else {
struct lcore_params *p =
rte_malloc(NULL, sizeof(*p), 0);
if (!p)
rte_panic("malloc failure\n");
*p = (struct lcore_params){worker_id, d, output_ring, mbuf_pool};
rte_eal_remote_launch((lcore_function_t *)lcore_worker,
p, lcore_id);
}
worker_id++;
}
/* call lcore_main on master core only */
struct lcore_params p = { 0, d, output_ring, mbuf_pool};
lcore_rx(&p);
RTE_LCORE_FOREACH_SLAVE(lcore_id) {
if (rte_eal_wait_lcore(lcore_id) < 0)
return -1;
}
print_stats();
return 0;
}

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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* 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 Intel 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 THE COPYRIGHT
* OWNER OR CONTRIBUTORS 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 TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MAIN_H_
#define _MAIN_H_
#ifdef RTE_EXEC_ENV_BAREMETAL
#define MAIN _main
#else
#define MAIN main
#endif
int MAIN(int argc, char *argv[]);
#endif /* ifndef _MAIN_H_ */