Date: Mon, 18 Feb 2008 14:10:05 GMT From: Thomas Hurst <tom@hur.st> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/64556: [sis] if_sis short cable fix problems with NetGear FA311's Message-ID: <200802181410.m1IEA5Tw059284@freefall.freebsd.org>
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The following reply was made to PR kern/64556; it has been noted by GNATS.
From: Thomas Hurst <tom@hur.st>
To: Volker <volker@vwsoft.com>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/64556: [sis] if_sis short cable fix problems with NetGear
FA311's
Date: Mon, 18 Feb 2008 14:07:27 +0000
Testing with Linux shows that receive seems to be throttled during
bidirectional activity. Unidirectional sees 93Mbps in either direction,
bidirectional sees 93Mbps sending and 35-60Mbps (50 average) receiving.
There's no sign of connection dropping in an hour of testing.
Linux is spewing APIC errors at me, not sure what, if anything, they're
related to.
A quick glance at the FreeBSD driver shows a DELAY(100000); which
probably accounts for the performance drops; each burst of 'short cable
fix' messages basically leaves the card idle for 300ms or so. The Linux
driver (drivers/net/natsemi.c) has no sign of such a delay.
This all happens during card setup, sis_initl(), shouldn't this be only
happening once when it aquires the link, not randomly during operation?
Watchdog timeouts excepted, but there's no sign of them.
--
Thomas 'Freaky' Hurst
http://hur.st/
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