linux-kernel - Re: [PATCH v3 1/1] r8169: Coalesce RTL8411b PHY power-down recovery programming instructions to reduce spinlock stalls

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Message-ID: <bd4a59be-c393-4302-9d32-759e7cbfe255@lunn.ch>
Date:   Tue, 31 Oct 2023 02:21:15 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Mirsad Todorovac <mirsad.todorovac@....unizg.hr>
Cc:     Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, nic_swsd@...ltek.com,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Marco Elver <elver@...gle.com>
Subject: Re: [PATCH v3 1/1] r8169: Coalesce RTL8411b PHY power-down recovery
 programming instructions to reduce spinlock stalls

> I will not contradict, but the cummulative amount of memory barriers on each MMIO read/write
> in each single one of the drivers could amount to some degrading of overall performance and
> latency in a multicore system.

For optimisations, we like to see benchmark results which show some
improvements. Do you have any numbers?

	Andrew