netdev - [PATCH net-next v2 2/2] selftests: drv-net: rss_ctx: make the test pass with few queues

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Message-ID: <20250901173139.881070-2-kuba@kernel.org>
Date: Mon,  1 Sep 2025 10:31:39 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	horms@...nel.org,
	ecree.xilinx@...il.com,
	gal@...dia.com,
	joe@...a.to,
	linux-kselftest@...r.kernel.org,
	shuah@...nel.org,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next v2 2/2] selftests: drv-net: rss_ctx: make the test pass with few queues

rss_ctx.test_rss_key_indir implicitly expects at least 5 queues,
as it checks that the traffic on first 2 queues is lower than
the remaining queues when we use all queues. Special case fewer
queues.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 tools/testing/selftests/drivers/net/hw/rss_ctx.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/drivers/net/hw/rss_ctx.py b/tools/testing/selftests/drivers/net/hw/rss_ctx.py
index a5562a9f729f..ed7e405682f0 100755
--- a/tools/testing/selftests/drivers/net/hw/rss_ctx.py
+++ b/tools/testing/selftests/drivers/net/hw/rss_ctx.py
@@ -178,8 +178,13 @@ from lib.py import ethtool, ip, defer, GenerateTraffic, CmdExitFailure
     cnts = _get_rx_cnts(cfg)
     GenerateTraffic(cfg).wait_pkts_and_stop(20000)
     cnts = _get_rx_cnts(cfg, prev=cnts)
-    # First two queues get less traffic than all the rest
-    ksft_lt(sum(cnts[:2]), sum(cnts[2:]), "traffic distributed: " + str(cnts))
+    if qcnt > 4:
+        # First two queues get less traffic than all the rest
+        ksft_lt(sum(cnts[:2]), sum(cnts[2:]),
+                "traffic distributed: " + str(cnts))
+    else:
+        # When queue count is low make sure third queue got significant pkts
+        ksft_ge(cnts[2], 3500, "traffic distributed: " + str(cnts))
 
 
 def test_rss_queue_reconfigure(cfg, main_ctx=True):
-- 
2.51.0