Hi, Guys. I have several newbie questions about the DPDK design I was hoping some one could answer.
Both in the RX and TX flow, the Buffer Memory must be pinned and not swappable. In RDMA, memory is explicitly registered and made pinned (to the limit defined @ /etc/security/limits.conf) .With regular sockets/kernel driver the NIC DMA's the buffer from/to the kernel which are by definition un swappable. So I'm guessing that at least the TX/RX buffers are mapped to kernel space. My questions are 1. How are the buffers made unswappable ? Are they shared with the kernel 2. When and Which buffers are mapped/unmapped to the kernel space. 3. When are the buffers DMA mapped and by whom? And another "bonus" Question. On TX flow I didn't find a way to receive a send completion. So how Can I know when its safe to modify the sent buffers (besides of waiting for the ring buffer to complete a full circle)? Thanks. Alex.
