Enable direct rearm mode. The mapping is decided in the data plane based on the first packet received.
Suggested-by: Honnappa Nagarahalli <honnappa.nagaraha...@arm.com> Signed-off-by: Feifei Wang <feifei.wa...@arm.com> Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com> Reviewed-by: Honnappa Nagarahalli <honnappa.nagaraha...@arm.com> --- examples/l3fwd/l3fwd_lpm.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/examples/l3fwd/l3fwd_lpm.c b/examples/l3fwd/l3fwd_lpm.c index bec22c44cd..38ffdf4636 100644 --- a/examples/l3fwd/l3fwd_lpm.c +++ b/examples/l3fwd/l3fwd_lpm.c @@ -147,7 +147,7 @@ lpm_main_loop(__rte_unused void *dummy) unsigned lcore_id; uint64_t prev_tsc, diff_tsc, cur_tsc; int i, nb_rx; - uint16_t portid; + uint16_t portid, tx_portid; uint8_t queueid; struct lcore_conf *qconf; const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / @@ -158,6 +158,8 @@ lpm_main_loop(__rte_unused void *dummy) const uint16_t n_rx_q = qconf->n_rx_queue; const uint16_t n_tx_p = qconf->n_tx_port; + int direct_rearm_map[n_rx_q]; + if (n_rx_q == 0) { RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", lcore_id); return 0; @@ -169,6 +171,7 @@ lpm_main_loop(__rte_unused void *dummy) portid = qconf->rx_queue_list[i].port_id; queueid = qconf->rx_queue_list[i].queue_id; + direct_rearm_map[i] = 0; RTE_LOG(INFO, L3FWD, " -- lcoreid=%u portid=%u rxqueueid=%hhu\n", lcore_id, portid, queueid); @@ -209,6 +212,17 @@ lpm_main_loop(__rte_unused void *dummy) if (nb_rx == 0) continue; + /* Determine the direct rearm mapping based on the first + * packet received on the rx queue + */ + if (direct_rearm_map[i] == 0) { + tx_portid = lpm_get_dst_port(qconf, pkts_burst[0], + portid); + rte_eth_direct_rxrearm_map(portid, queueid, + tx_portid, queueid); + direct_rearm_map[i] = 1; + } + #if defined RTE_ARCH_X86 || defined __ARM_NEON \ || defined RTE_ARCH_PPC_64 l3fwd_lpm_send_packets(nb_rx, pkts_burst, -- 2.25.1