Hey Amit, Regarding the pings. Try to set the same MAC on vEth as you have on eth0 prior the unbind, i.e.:
# ifconfig vEth hw ether <eth0 MAC> Regarding the logs. There are compile-time options to enable debugs in PMDs. Please see config/common_base file for the complete list. Not sure which driver you use, but for virtio-net you could try to enable *_VIRTIO_DEBUG_RX/TX and then recompile the DPDK and the KNI example. Regards, Andriy On Mon, Sep 19, 2016 at 9:59 AM, Amit Sharma <amit.sh1094 at gmail.com> wrote: > Hi, > > While running the DPDK KNI sample application, we are facing packet drop > after some time. > > *Setup:-* > 1. 2 VMs configured using Ubuntu 14.04 > 2. eth0 of both VMs connected to each other, and able to ping > > *DPDK related setup:-* > 1. 1st VM eth0 is bound with DPDK driver[bind=uio_pci_generic] > 2. Insert the KNI module in Linux kernel[insmod rte_kni.ko]. > 3. Start the KNI application [*./build/kni -c 0x3 -n 4 -- -P -p 0x1 > --config="(0,0,1)"*]. > 4. Assign the ip address to vEth0 [*ifconfig vEth0 10.0.1.2*] > 5. start the tcpdump on vEth0 > 6. From 2nd VM try to ping 8.8.8.8 > > *Issue:- * > ping works fine for around 400-500 packets(we reserved 2000 2MB hugepages). > after that ping packet is never sent back to VM2 > on further investigation we found *rte_eth_tx_burst *always returns 0 when > the problem occurs > we are investigating it further, But before that any help is welcome > > > on the side note, we have another issue with log levels, to investigate the > above issue we were trying to enable the logs for PMD > using the following code > > rte_set_log_type(RTE_LOGTYPE_PMD, 1); > > rte_set_log_level(RTE_LOG_DEBUG); > > during initialization we see some logs from PMD, But after that no logs > during receive and transmission of packets, any idea why is that? > > Thanks > Amit Sharma -- Andriy Berestovskyy
