The hairpin queue is the one that start from normal rxq,
and will be less than nr_queues where nr_queues is the
sum of normal and hairpin
Fixes: bf3688f1e816 ("app/flow-perf: add insertion rate calculation")
Cc: wis...@mellanox.com
Signed-off-by: Wisam Jaddo <wis...@mellanox.com>
Reviewed-by: Asaf Penso <as...@mellanox.com>
---
v2:
* Add documentation of hairpin peering and allocating logic.
* Add documentation for some variables.
---
app/test-flow-perf/main.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/app/test-flow-perf/main.c b/app/test-flow-perf/main.c
index e155e49c37..8f12ee10f1 100644
--- a/app/test-flow-perf/main.c
+++ b/app/test-flow-perf/main.c
@@ -1012,8 +1012,26 @@ init_port(void)
rte_strerror(-ret), port_id);
if (hairpinq != 0) {
+ /* Each hairpin queue setup need a hairpin configuration
+ * object, which determine the TX path for hairpin.
+ *
+ * The peering here represent the TX side, which mean
the
+ * peer.port represent TX port, and peer.queue represent
+ * tx_queue.
+ *
+ * So if RXQ=4 and TXQ=4, and first hairpin_q is 4 after
+ * [0, 1, 2, 3], then tx_queue is TXQ+i which is 4 as
well.
+ *
+ * hairpinq: represent the number of hairpin queues
needed
+ * to be initialized.
+ *
+ * In 0 case means no hairpin queues needed which is the
+ * default.
+ *
+ * hairpin_q: represent hairpin queue id to be
initialized.
+ */
for (hairpin_q = RXQ_NUM, std_queue = 0;
- std_queue < nr_queues;
+ hairpin_q < nr_queues;
hairpin_q++, std_queue++) {
hairpin_conf.peers[0].port = port_id;
hairpin_conf.peers[0].queue =
@@ -1028,7 +1046,7 @@ init_port(void)
}
for (hairpin_q = TXQ_NUM, std_queue = 0;
- std_queue < nr_queues;
+ hairpin_q < nr_queues;
hairpin_q++, std_queue++) {
hairpin_conf.peers[0].port = port_id;
hairpin_conf.peers[0].queue =
--
2.17.1
