Commit 01031fd4 authored by Song Yoong Siang's avatar Song Yoong Siang Committed by Daniel Borkmann
Browse files

selftests/bpf: xdp_hw_metadata reduce sleep interval 



In current ping-pong design, xdp_hw_metadata will wait until the packet
transmission 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 is able to support periodic packets with shorter interval.
10us * 500 = 5ms should be enough for packet transmission and status
retrieval.

Signed-off-by: default avatarSong Yoong Siang <yoong.siang.song@intel.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Acked-by: default avatarStanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20240303083225.1184165-2-yoong.siang.song@intel.com
parent 8f79870e

tools/testing/selftests/bpf/xdp_hw_metadata.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

					}

				}

			}