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Date: Tue, 2 Sep 2025 16:21:01 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Carolina Jubran <cjubran@nvidia.com>
Cc: Shuah Khan <shuah@kernel.org>, Andrew Lunn <andrew+netdev@lunn.ch>,
 "David S . Miller" <davem@davemloft.net>, Eric Dumazet
 <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, Gal Pressman
 <gal@nvidia.com>, Tariq Toukan <tariqt@nvidia.com>, "Cosmin Ratiu"
 <cratiu@nvidia.com>, Nimrod Oren <noren@nvidia.com>, Mark Bloch
 <mbloch@nvidia.com>, <linux-kernel@vger.kernel.org>,
 <linux-kselftest@vger.kernel.org>, <netdev@vger.kernel.org>
Subject: Re: [PATCH 3/3] selftests: drv-net: Relax total BW check in
 devlink_rate_tc_bw.py
Message-ID: <20250902162101.5c78cc88@kernel.org>
In-Reply-To: <20250831080641.1828455-4-cjubran@nvidia.com>
References: <20250831080641.1828455-1-cjubran@nvidia.com>
	<20250831080641.1828455-4-cjubran@nvidia.com>
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On Sun, 31 Aug 2025 11:06:41 +0300 Carolina Jubran wrote:
> Because the measured total is the sum of two iperf3 streams that do not
> always start or stop at the same time

That's solvable, tho? iperf3 has --json support, it will give you 
the b/w readings in the configured intervals (1sec by default).
With the interval based samples at hand you should be able to select
only the period in which b/w is stable ("middle" of the test).

While at it it may make sense to switch to lib/py/load.py wrappers
rather than threading the python locally in the test.