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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