linux-kernel - [PATCH net-next] selftests: ncdevmem: remove sleep on rx

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Message-ID: <20250912170611.676110-1-sdf@fomichev.me>
Date: Fri, 12 Sep 2025 10:06:11 -0700
From: Stanislav Fomichev <sdf@...ichev.me>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	shuah@...nel.org,
	sdf@...ichev.me,
	almasrymina@...gle.com,
	joe@...a.to,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next] selftests: ncdevmem: remove sleep on rx

RX devmem sometimes fails on NIPA:

https://netdev-3.bots.linux.dev/vmksft-fbnic-qemu-dbg/results/294402/7-devmem-py/

Both RSS and flow steering are properly installed, but the wait_port_listen
fails. Try to remove sleep(1) to see if the cause of the failure is
spending too much time during RX setup. I don't see a good reason to
have sleep in the first place. If there needs to be a delay between
installing the rules and receiving the traffic, let's add it to the
callers (devmem.py) instead.

Signed-off-by: Stanislav Fomichev <sdf@...ichev.me>
---
 tools/testing/selftests/drivers/net/hw/ncdevmem.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tools/testing/selftests/drivers/net/hw/ncdevmem.c b/tools/testing/selftests/drivers/net/hw/ncdevmem.c
index c0a22938bed2..3288ed04ce08 100644
--- a/tools/testing/selftests/drivers/net/hw/ncdevmem.c
+++ b/tools/testing/selftests/drivers/net/hw/ncdevmem.c
@@ -872,8 +872,6 @@ static int do_server(struct memory_buffer *mem)
 		goto err_reset_rss;
 	}
 
-	sleep(1);
-
 	if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) {
 		pr_err("Failed to bind");
 		goto err_reset_flow_steering;
-- 
2.51.0