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Message-Id: <20240301162348.898619-2-yoong.siang.song@intel.com>
Date: Sat, 2 Mar 2024 00:23:47 +0800
From: Song Yoong Siang <yoong.siang.song@...el.com>
To: Jesse Brandeburg <jesse.brandeburg@...el.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Richard Cochran <richardcochran@...il.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Stanislav Fomichev <sdf@...gle.com>,
Vinicius Costa Gomes <vinicius.gomes@...el.com>,
Florian Bezdeka <florian.bezdeka@...mens.com>,
Andrii Nakryiko <andrii@...nel.org>,
Eduard Zingerman <eddyz87@...il.com>,
Mykola Lysenko <mykolal@...com>,
Martin KaFai Lau <martin.lau@...ux.dev>,
Song Liu <song@...nel.org>,
Yonghong Song <yonghong.song@...ux.dev>,
KP Singh <kpsingh@...nel.org>,
Hao Luo <haoluo@...gle.com>,
Jiri Olsa <jolsa@...nel.org>,
Shuah Khan <shuah@...nel.org>
Cc: intel-wired-lan@...ts.osuosl.org,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
bpf@...r.kernel.org,
linux-kselftest@...r.kernel.org,
xdp-hints@...-project.net
Subject: [PATCH iwl-next,v2 1/2] selftests/bpf: xdp_hw_metadata reduce sleep interval
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@...el.com>
---
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
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