I was wondering... How widely is DPDK used with 32 bit architectures?
Both phys_addr_t and rte_iova_t are cast as uint64_t in rte_common.h. Should they be uint32_t on 32 bit arch? If so, the rte_mbuf structure has 12 unused byte in the first cache line on 32 bit arch. Now, moving the "next" (4 byte pointer) and "tx_offload" (8 byte flags) fields to the first cache line could improve performance significantly, because this modification would leave the second cache line unused in most cases. Med venlig hilsen / Kind regards, -Morten Brørup
