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Re: Does ISA interrupt latency harm overall system performance?

To: Statux <statux@xxxxxxxxxxx>
Subject: Re: Does ISA interrupt latency harm overall system performance?
From: Steve Snyder <swsnyder@xxxxxxxx>
Date: Sat, 16 Jun 2001 07:40:22 -0700
Cc: netdev@xxxxxxxxxxx
In-reply-to: <Pine.LNX.4.33.0106160441340.2950-100000@xxxxxxxxxxxxxxxxxxxx>
References: <Pine.LNX.4.33.0106160441340.2950-100000@xxxxxxxxxxxxxxxxxxxx>
Reply-to: swsnyder@xxxxxxxx
Sender: owner-netdev@xxxxxxxxxxx
On Saturday 16 June 2001 02:03 am, Statux wrote:

> > I've got 2 10Mbps Ethernet cards, one is an ISA card and the other PCI.
> >  I use the ISA card as a secondary net device (eth1) which is connected
> > to a cable modem.  Given that the cable modem will never saturate a
> > 10Mbps Ethernet card, the ISA/PCI question shouldn't be relevant to
> > networking performance.  I chose to use the ISA card because it leaves
> > another PCI slot in my box (i686-based Linux 2.4.x) available for other
> > uses.
>
> How fast do cable modems run at anyway (I live in the woods.. no service
> here)? I know they don't do the 1.25MB that 10Mbps NICs can do... but I'm
> just curious.

The throughput varies by ISP and cable modem - and by time of day since 
you're essentially talking on a party line.

The best throughput I've seen  on this 3Com cable modem is 100kbytes/sec.  
3Com says (make that "said", since they are out of the business now) that 
the device runs up to 3Mbps.  So far @Home has not seen fit to let me get 
that level of performance.

Thanks for the response.

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