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From: Marek Behun <marek.behun@nic.cz>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Andrew Lunn <andrew@lunn.ch>,
	netdev@vger.kernel.org,
	Russell King <rmk+kernel@arm.linux.org.uk>
Subject: marvell 6190 NAT performance
Date: Thu, 24 Jan 2019 21:26:40 +0100	[thread overview]
Message-ID: <20190124212640.43813222@nic.cz> (raw)

Hello,

I am encountering strange performance issue when benchmarking NAT
performance on Armada 3720 with Marvell 88e6190 switch.

Download speed (from internet, via Armada 3720 NAT, via switch to LAN
device) is ~750mbps and the CPU running on 100% (mostly in ksoftirq).
Upload speed is ~250mbps.

When the LAN device is connected to A3720 directly (via SFP), the
speeds are both ~1000mbps.

I realize that packing/unpacking packets with Marvell header for the
switch takes some time, but is such a performance drop expected?

This was tested with 5.0.0-rc2 and also 4.14.

Thank you.

Marek

             reply	other threads:[~2019-01-24 20:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-24 20:26 Marek Behun [this message]
2019-01-24 21:31 ` marvell 6190 NAT performance Florian Fainelli
2019-01-25 12:09   ` Marek Behún
2019-01-29 14:27   ` Marek Behún
2019-01-29 14:56     ` Andrew Lunn

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