umem_size
umem->base_addr = umem_size(umem);
umem->next_buffer = umem_size(umem);
if (pkts_in_flight >= (int)((umem_size(umem) - xsk->batch_size * buffer_len) /
if (umem->next_buffer >= umem->base_addr + umem_size(umem))
u64 umem_size = umem->num_frames * umem->frame_size;
{umem_size, XSK_UMEM__LARGE_FRAME_SIZE, 0, false, XDP_PKT_CONTD},
u64 umem_size = umem->num_frames * umem->frame_size;
{umem_size - MIN_PKT_SIZE - 2 * umem->frame_size, MIN_PKT_SIZE, 0, true},
{umem_size, MIN_PKT_SIZE, 0, false},
{umem_size - MIN_PKT_SIZE / 2, MIN_PKT_SIZE, 0, false},
pkts[4].offset += umem_size;
pkts[5].offset += umem_size;
pkts[6].offset += umem_size;
u64 page_size, umem_size;
umem_size = test->ifobj_tx->umem->num_frames * test->ifobj_tx->umem->frame_size;
assert(umem_size % page_size > MIN_PKT_SIZE);
assert(umem_size % page_size < page_size - MIN_PKT_SIZE);