In current ping-pong design, xdp_hw_metadata will wait until the packet
transmition completely done, then only start to receive the next packet.
The current sleep interval is 10ms, which is unnecessary large. Typically,
a NIC does not need such a long time to transmit a packet. Furthermore,
during this 10ms sleep time, the app is unable to receive incoming packets.
Therefore, this commit reduce sleep interval to 10us, so that
xdp_hw_metadata able to support periodic packets with shorter interval.
10us * 500 = 5ms should be enough for packet transmission and status
retrival.
Signed-off-by: Song Yoong Siang <yoong.siang.song@xxxxxxxxx>
---
tools/testing/selftests/bpf/xdp_hw_metadata.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c
index 878d68db0325..bdf5d8180067 100644
--- a/tools/testing/selftests/bpf/xdp_hw_metadata.c
+++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c
@@ -480,7 +480,7 @@ static int verify_metadata(struct xsk *rx_xsk, int rxq, int server_fd, clockid_t
for (int j = 0; j < 500; j++) {
if (complete_tx(xsk, clock_id))
break;
- usleep(10*1000);
+ usleep(10);
}
}
}
--
2.34.1
