Re: VIC 20 networking

From: Raymond C. Bryan (
Date: 2004-03-10 17:53:10

>On Tue, Mar 09, 2004 at 11:35:12PM +0000, Davison, Lee wrote:
>>  The idea was to simulate, as closely as I can, many unsynchronised
>>  requests from many places. Flood ping couldn't send two or more
>>  simultaneous (or as near as makes no odds) requests and so would
>>  never fill the Vic's receive buffer.
>True, I didn't think of that.  But are the requests unsynchronised enough?
>By default, ping sends ICMP echo request at roughly one-second intervals.
>You would have to run it very long in order to get enough clock drift between
>the ping clients, to make the requests arrive close to each other.
>BTW, couldn't you get a better stress test by modifying the TCP/IP stack on
>the sender, to send multiple ICMP echo request packets in a row?
>Flood ping would measure a different thing: throughput.  I'd be interested in
>the results.  I've noticed that Windows machines have hard time 
>keeping up with
>flood ping, while Linux loses practically no packets.  That is on a 100 Mb/s
>full duplex link, on a several hundred MHz processor.  It'd be interesting
>to see how much the Vic-20 can manage using no DMA.

FreeBSD pings from my Amiga are also well handled -- the amiga seems 
to tolerate much longer ping-echo times than other hardware does. 
(Using Miami and Miamiping)

|Raymond C. Bryan  651-642-9890 vox      | The battle is sometimes |
|Raymond Computer  651-642-9891 fax      | to the small for 
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|USA              Amiga - Commodore      |     -- James Thurber -- |

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