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[109.190.92.136]) by mx.google.com with ESMTPSA id hz9sm6622145wjb.17.2014.11.26.06.38.35 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 26 Nov 2014 06:38:36 -0800 (PST) From: Thomas Monjalon To: dev@dpdk.org Date: Wed, 26 Nov 2014 15:38:07 +0100 Message-Id: <1417012687-18812-1-git-send-email-thomas.monjalon@6wind.com> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1415975510-24015-1-git-send-email-bruce.richardson@intel.com> References: <1415975510-24015-1-git-send-email-bruce.richardson@intel.com> Subject: [dpdk-dev] [PATCH v3] examples/skeleton: very simple code for packet forwarding X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Nov 2014 14:27:40 -0000 From: Bruce Richardson This is a very simple example app for doing packet forwarding with the Intel DPDK. It's designed to serve as a start point for people new to the Intel DPDK and who want to develop a new app. Therefore it's meant to: * have as good a performance out-of-the-box as possible, using the best-known settings for configuring the PMDs, so that any new apps can be based off it. * be kept as short as possible to make it easy to understand it and get started with it. Signed-off-by: Bruce Richardson --- v3 changes: - rename skeleton_app/ to skeleton/ - add in examples Makefile - fix default target to native - reword header guard - rename rxRings to rx_rings and txRings to tx_rings examples/Makefile | 1 + examples/{ => skeleton}/Makefile | 52 ++++------- examples/skeleton/basicfwd.c | 183 +++++++++++++++++++++++++++++++++++++++ examples/skeleton/basicfwd.h | 46 ++++++++++ 4 files changed, 249 insertions(+), 33 deletions(-) copy examples/{ => skeleton}/Makefile (60%) create mode 100644 examples/skeleton/basicfwd.c create mode 100644 examples/skeleton/basicfwd.h diff --git a/examples/Makefile b/examples/Makefile index 121dab4..8055297 100644 --- a/examples/Makefile +++ b/examples/Makefile @@ -61,6 +61,7 @@ DIRS-y += netmap_compat/bridge DIRS-$(CONFIG_RTE_LIBRTE_METER) += qos_meter DIRS-$(CONFIG_RTE_LIBRTE_SCHED) += qos_sched DIRS-y += quota_watermark +DIRS-y += skeleton DIRS-y += timer DIRS-$(CONFIG_RTE_LIBRTE_VHOST) += vhost DIRS-$(CONFIG_RTE_LIBRTE_XEN_DOM0) += vhost_xen diff --git a/examples/Makefile b/examples/skeleton/Makefile similarity index 60% copy from examples/Makefile copy to examples/skeleton/Makefile index 121dab4..4a5d99f 100644 --- a/examples/Makefile +++ b/examples/skeleton/Makefile @@ -1,6 +1,7 @@ # BSD LICENSE # -# Copyright(c) 2014 6WIND S.A. +# 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 @@ -12,7 +13,7 @@ # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with the # distribution. -# * Neither the name of 6WIND S.A. nor the names of its +# * 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. # @@ -32,40 +33,25 @@ ifeq ($(RTE_SDK),) $(error "Please define RTE_SDK environment variable") endif -# Default target, can be overriden by command line or environment +# Default target, can be overridden by command line or environment RTE_TARGET ?= x86_64-native-linuxapp-gcc include $(RTE_SDK)/mk/rte.vars.mk -DIRS-y += cmdline -ifneq ($(ICP_ROOT),) -DIRS-y += dpdk_qat +# binary name +APP = basicfwd + +# all source are stored in SRCS-y +SRCS-y := basicfwd.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 -DIRS-y += exception_path -DIRS-y += helloworld -DIRS-y += ip_pipeline -DIRS-y += ip_reassembly -DIRS-$(CONFIG_RTE_MBUF_REFCNT) += ip_fragmentation -DIRS-$(CONFIG_RTE_MBUF_REFCNT) += ipv4_multicast -DIRS-$(CONFIG_RTE_LIBRTE_KNI) += kni -DIRS-y += l2fwd -DIRS-$(CONFIG_RTE_LIBRTE_IVSHMEM) += l2fwd-ivshmem -DIRS-y += l3fwd -DIRS-$(CONFIG_RTE_LIBRTE_ACL) += l3fwd-acl -DIRS-$(CONFIG_RTE_LIBRTE_POWER) += l3fwd-power -DIRS-y += l3fwd-vf -DIRS-y += link_status_interrupt -DIRS-y += load_balancer -DIRS-y += multi_process -DIRS-y += netmap_compat/bridge -DIRS-$(CONFIG_RTE_LIBRTE_METER) += qos_meter -DIRS-$(CONFIG_RTE_LIBRTE_SCHED) += qos_sched -DIRS-y += quota_watermark -DIRS-y += timer -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 +EXTRA_CFLAGS += -O3 -g -Wfatal-errors + +include $(RTE_SDK)/mk/rte.extapp.mk diff --git a/examples/skeleton/basicfwd.c b/examples/skeleton/basicfwd.c new file mode 100644 index 0000000..ef8f90c --- /dev/null +++ b/examples/skeleton/basicfwd.c @@ -0,0 +1,183 @@ +/*- + * 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 +#include +#include +#include +#include +#include +#include +#include "basicfwd.h" + +#define RX_RING_SIZE 128 +#define TX_RING_SIZE 512 + +#define NUM_MBUFS 8191 +#define MBUF_SIZE (1600 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM) +#define MBUF_CACHE_SIZE 250 +#define BURST_SIZE 32 + +static const struct rte_eth_conf port_conf_default = { + .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN, }, +}; + +/* + * 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 rx_rings = 1, tx_rings = 1; + int retval; + uint16_t q; + + if (port >= rte_eth_dev_count()) + return -1; + + retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); + if (retval != 0) + return retval; + + for (q = 0; q < rx_rings; 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 < tx_rings; 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 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; +} + +/* + * Main thread that does the work, reading from INPUT_PORT + * and writing to OUTPUT_PORT + */ +static __attribute__((noreturn)) void +lcore_main(void) +{ + const uint8_t nb_ports = rte_eth_dev_count(); + uint8_t port; + for (port = 0; port < nb_ports; port++) + if (rte_eth_dev_socket_id(port) > 0 && + rte_eth_dev_socket_id(port) != + (int)rte_socket_id()) + printf("WARNING, port %u is on remote NUMA node to " + "polling thread.\n\tPerformance will " + "not be optimal.\n", port); + + printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", + rte_lcore_id()); + for (;;) { + for (port = 0; port < nb_ports; port++) { + struct rte_mbuf *bufs[BURST_SIZE]; + const uint16_t nb_rx = rte_eth_rx_burst(port, 0, + bufs, BURST_SIZE); + if (unlikely(nb_rx == 0)) + continue; + const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, + bufs, nb_rx); + if (unlikely(nb_tx < nb_rx)) { + uint16_t buf; + for (buf = nb_tx; buf < nb_rx; buf++) + rte_pktmbuf_free(bufs[buf]); + } + } + } +} + +/* Main function, does initialisation and calls the per-lcore functions */ +int +MAIN(int argc, char *argv[]) +{ + struct rte_mempool *mbuf_pool; + unsigned nb_ports; + uint8_t portid; + + /* 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; + + nb_ports = rte_eth_dev_count(); + if (nb_ports < 2 || (nb_ports & 1)) + rte_exit(EXIT_FAILURE, "Error: number of ports must be even\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"); + + /* initialize all ports */ + for (portid = 0; portid < nb_ports; portid++) + if (port_init(portid, mbuf_pool) != 0) + rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n", + portid); + + if (rte_lcore_count() > 1) + printf("\nWARNING: Too much enabled lcores - App uses only 1 lcore\n"); + + /* call lcore_main on master core only */ + lcore_main(); + return 0; +} diff --git a/examples/skeleton/basicfwd.h b/examples/skeleton/basicfwd.h new file mode 100644 index 0000000..3797b5d --- /dev/null +++ b/examples/skeleton/basicfwd.h @@ -0,0 +1,46 @@ +/*- + * 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 BASICFWD_H +#define BASICFWD_H + + +#ifdef RTE_EXEC_ENV_BAREMETAL +#define MAIN _main +#else +#define MAIN main +#endif + +int MAIN(int argc, char *argv[]); + +#endif /* BASICFWD_H */ -- 2.1.3