Date: Wed, 07 Jun 2000 19:54:44 -0400 From: Dennis <dennis@etinc.com> To: Mike Smith <msmith@FreeBSD.ORG> Cc: hackers@FreeBSD.ORG Subject: Re: if_dc in v4.0 - Forcing store and forward? Message-ID: <200006072355.TAA22204@etinc.com> In-Reply-To: <200006072340.QAA01962@mass.cdrom.com> References: <Your message of "Wed, 07 Jun 2000 16:44:57 EDT." <200006072045.QAA21613@etinc.com>
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At 04:40 PM 6/7/00 -0700, Mike Smith wrote: >> >> Running a Dlink quad card (570TX) in 100Mb/s full dup mode the driver >> complains about underruns for awhile and then ultimately sets >> store_and_forward which seems to make it work. >> >> Is there a way to force this easily? It seems that it should certainly be >> the default if full dup 100 mode is detected as the other settings fail >> quite easily on rather trivial activities. >> >> should this card be used with the if_dc or if_de driver? Both seem to probe >> it successfully, although both drivers have the same (annoying) underrun >> problem (that wasnt a problem or at least not screen-verbalized in 3.4). > >Transmit underrun is usually caused by another peripheral hogging the PCI >bus; either a poorly configured card with an excessive latency value, or >a misconfigured card (due to BIOS bugs), or a card that otherwise ignores >the PCI latency rules, or a system with too many busy busmaster cards. I'm well aware of that but it doesnt really help. I suspect that the onboard PCI bridge chip is slowing things a bit...the bottom line is that doing a simple transfer with nothing else going on causes the failures...which is precisely why I want to set it by default. Dennis > >> Dennis >> Emerging Technologies, Inc. >> ---------------------------------------------------------------------------- >> --------- >> >> >> >> http://www.etinc.com >> ISA and PCI T1/T3/V35/HSSI Cards for FreeBSD and LINUX >> Multiport T1 and HSSI/T3 UNIX-based Routers >> Bandwidth Management Standalone Systems >> Bandwidth Management software for LINUX and FreeBSD >> >> >> To Unsubscribe: send mail to majordomo@FreeBSD.org >> with "unsubscribe freebsd-hackers" in the body of the message >> >> >> >> To Unsubscribe: send mail to majordomo@FreeBSD.org >> with "unsubscribe freebsd-hackers" in the body of the message >> > >-- >\\ Give a man a fish, and you feed him for a day. \\ Mike Smith >\\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org >\\ and he'll hate you for a lifetime. \\ msmith@cdrom.com > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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