Date: Wed, 25 Oct 2006 17:10:21 GMT From: "C. Weber" <cwf-ml@arcor.de> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/90890: [vr] Problems with network: vr0: tx shutdown timeout Message-ID: <200610251710.k9PHALUJ052156@freefall.freebsd.org>
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The following reply was made to PR kern/90890; it has been noted by GNATS.
From: "C. Weber" <cwf-ml@arcor.de>
To: bug-followup@FreeBSD.org, maciejb@widzew.net
Cc:
Subject: Re: kern/90890: [vr] Problems with network: vr0: tx shutdown timeout
Date: Wed, 25 Oct 2006 19:06:05 +0200
and another followup:
further tests show:
- the problem only occurs when we use half duplex (both 10 and
100 Mbps), with 100/full it does not happen (I currently
lack the hardware to construct a 10/full test case).
Apparently the card/driver has trouble with high
collision rates.
- regardless if the problem occurs I see extremely high
interrupt loads for the vr device - a single full-speed
ftp transfer to the system produces ~ 12.000 interrupts
per second, which is huge and smashes the machine against
the 100% load border. Apparently the driver or the
hardware sees a need to interrupt for every single incoming
or outgoing packet (the ftp transfer has ~8000 pps incoming and
~4000 pps outgoing (acks).
Regards, Christoph Weber-Fahr
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