> -----Original Message-----
> From: users <users-boun...@dpdk.org> On Behalf Of Jeevan Nailwal
> Sent: Wednesday, September 15, 2021 1:11 PM
> To: users@dpdk.org
> Subject: [dpdk-users] New to DPDK
>
> Hi Everyone, I am new to DPDK and trying to learn its usage. I am facing a
> SEGFAULT while sending a single packet via this.
> Please find the snippet of my code below:
Hi Jeevan,
> ------------Started my program with initial pool configuration:
> ret = rte_eal_init(argc, argv);
> if (ret < 0)
> rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
> argc -= ret;
> argv += ret;
>
> rte_log_set_global_level(RTE_LOG_NOTICE);
>
> /* parse app arguments */
> if (rte_lcore_count() > RTE_MAX_LCORE)
> rte_exit(EXIT_FAILURE,"Not enough cores\n");
>
> create_mbuf_pool(128000, 128);
>
> ret = rte_vhost_driver_register(sockpath, 0);
> if (ret != 0)
> rte_exit(EXIT_FAILURE, "vhost driver register failure.\n");
>
>
> rte_vhost_driver_callback_register (sockpath, &virtio_net_device_ops);
> chmod (sockpath, 0777);
> rte_vhost_driver_start(sockpath);
Could I suggest to start with a simpler program than going straight for vhost?
Some basic forwarding using e.g. pcap PMD or something would simplify the
problem... and help get something small working correctly before attempting big.
> -------- afterwards i created a thread to instantiate m TX.. i.e. receive
> packet from DPDK:
>
> ret = pthread_create (&proc_tx, NULL, (void *)tx_process, NULL);
> if (ret != 0)
> {
> rte_exit (EXIT_FAILURE, "Cannot create TX thread\n");
> }
DPDK handles thread creation, assigns "lcore ids" and various other
thread-local specific things to the thread.
These are later used in e.g. mempool library for optimized per-thread cache
data structures. Using a "raw"
pthread will not work with DPDK function-calls, nor is it expected to.
Have a look at examples/helloworld to see how lcores are launch using DPDK.
Then perhaps look at examples/skeleton to see how launched lcores can use rx/tx
burst APIs correctly.
Hope that helps! -Harry
