From: Samium Gromoff <root@ibe.miee.ru>
Message-Id: <200202191318.g1JDIcm12054@ibe.miee.ru>
Subject: NE2k driver issue
To: linux-kernel@vger.kernel.org
Date: Tue, 19 Feb 2002 16:18:38 +0300 (MSK)
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Sender: linux-kernel-owner@vger.kernel.org

	I`ve experienced a very strange relationship between
ISA sb card generated interrupts and network NIC perfomance.

	The situation was the next: i`ve performed a data transfer from
a remote samba share to the local box thru a 10Mbit ISA NIC.
What has been varying was the interrupt load of the sound card.
With esd started the sound card generated 500-600 interrupts/second,
with no esd, it didnt generated interrupts.

	Theoretically the sbcard interrupts should make the NIC starve
and reduce the NIC performance. But the situation i`ve experienced
was weird as hell.

	With esd started the samba transfer maxes out at 400kb/s.
	With esd stopped it immediately drops down to 30-35 kb/s.

This is also well reflected by the NIC interrupt rate cutting down
by 90% with esd stopped.

	Info: linux-2.4.17-rmap12e, NE2k ISA NIC, SB16 Vibra ISA

regards, Samium Gromoff

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