Hello, I am working on an application that involves fragmenting a large buffer into many smaller packets/mbufs and sending them with DPDK. The fragment packets for each data buffer are currently sent in a loop without any throttling (I plan to add some sort of rate limiting later). I am not using any of the special DPDK features for IP fragmention. I am simply preparing and sending mbufs for each fragment.
The problem I am having is that when I need to send large buffers, which involve many packets being sent in a tight loop, sometimes part of the payload is corrupted when received on the other machine. This is rare and only happens above a certain data rate. I would like to have a reliable way to detect (or even better, prevent) this corruption. Out of paranoia I placed an rte_compiler_barrier() and then an rte_mb() (a memory barrier) between the code that prepares the mbuf and the actual tx_burst(). It did not help and I think it should be unnecessary. I found some information about the function rte_mbuf_check() and have started using it to check every received packet on the other end. It fails to detect this corruption. Any advice would be appreciated. -Alan
