netdev - [PATCH net-next 5/9] selftests: drv-net: give HW stats sync time extra 25% of margin

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Message-ID: <20260205220541.2992807-6-kuba@kernel.org>
Date: Thu,  5 Feb 2026 14:05:37 -0800
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,
	shuah@...nel.org,
	willemb@...gle.com,
	petrm@...dia.com,
	donald.hunter@...il.com,
	michael.chan@...adcom.com,
	pavan.chebbi@...adcom.com,
	linux-kselftest@...r.kernel.org,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 5/9] selftests: drv-net: give HW stats sync time extra 25% of margin

There are transient failures for devices which update stats
periodically, especially if it's the FW DMA'ing the stats
rather than host periodic work querying the FW. Wait 25%
longer than strictly necessary.

For devices which don't report stats-block-usecs we retain
25 msec as the default wait time.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 tools/testing/selftests/drivers/net/lib/py/env.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/drivers/net/lib/py/env.py b/tools/testing/selftests/drivers/net/lib/py/env.py
index 41cc248ac848..39a98eb2592e 100644
--- a/tools/testing/selftests/drivers/net/lib/py/env.py
+++ b/tools/testing/selftests/drivers/net/lib/py/env.py
@@ -285,7 +285,7 @@ from .remote import Remote
                 if "Operation not supported" not in e.cmd.stderr:
                     raise
 
-            self._stats_settle_time = 0.025 + \
-                data.get('stats-block-usecs', 0) / 1000 / 1000
+            self._stats_settle_time = \
+                1.25 * data.get('stats-block-usecs', 20000) / 1000 / 1000
 
         time.sleep(self._stats_settle_time)
-- 
2.53.0