Hi,
I'm trying to send and receive jumbo frame ethernet packets.
While sending works without any issues, I always receive fragmented / segmented
packets.
This leads me to the following questions:
1. Is it possible to receive a frame without segmentation
2. How to properly size the mempool elements. Here, I tried the following
(pkt_bytes is the maximum expected frame size):
buf_size = RTE_PKTMBUF_HEADROOM + pkt_bytes;
rte_mempool_create(mempool_name, NB_MBUF, buf_size,
MAX_PKT_BURST, sizeof(struct
rte_pktmbuf_pool_private),
rte_pktmbuf_pool_init, NULL,
rte_pktmbuf_init, NULL,
rte_socket_id(),
MEMPOOL_F_SP_PUT |
MEMPOOL_F_SC_GET);
Some experiments with various buf_sizes showed, that if I make the buffer large
enough (e.g. pkt_bytes * 2) it seems to work at least for some NICs (with IXGBE
driver).
DPDK: 20.11-rc1
Best regards,
Felix
