Re: Ethernet cards, Gfx programming
You might want to look at things other than Ethernet. Another thing that
Beowulf can use is something called Myrinet that is much faster than
ethernet (even fast ethernet) for IP and much much faster (just over
1Gbps) if you don't mind recoding you application to bypass IP (and do
zero-copy transfers). I think that it's in the sparc linux kernel and I
know that drivers exist for linux on intel.
The cards aren't cheap, but two Sbus fast ethernet cards is probably
pricey as well. And, you don't need a hub if you're only connecting two
computers.
On Mon, 27 Jul 1998, Markus Lechner wrote:
> Hi again,
>
> The Sparc5 is coming today - finally. It took longer than expected :(
> Thanks for the pinout, i fetched the complete FAQ's yesterday and read
> them ... and nice to know that there aren't that many differences
> between
> the different Debian dists...
>
> So there's time to ask another question:
>
> I realised that i need a fast network connection between the PC and the
> Sparc. They must be connected at least with one 100Mbit Ethernet card.
> Much better would be 2 x 100Mbit Ethernet per machine (that would be
> approximately 25MB/s - in theory, right?). Maybe two more machines will
> be integrated as well (then i will think about hubs and/or switches,
> etc.)
> I'm trying to establish a system (as small as possible) which is highly
> redundant, is capable of handling/routing/processing incoming
> data-streams
> and may have one or more heads (terminals). Beowulf uses more Ethernet
> cards per node - with more throughput, but (maybe again related to the
> app
> itself) they don't reach 20MB/s (as far as i remember).
>
>
> Is it possible to use two 100Mbit Ethernet cards in a Sparc5?
> (what's the throughput? caveats?)
>
> How much do i have to pay for one (respective two) cards?
>
> Are there 3rd-party companies selling cheap(er) 100Mbit cards for
> Sparc5?
> (in Europe, preferably)
>
> Apart from this i'd like to use the onboard 10Mbit controller, too.
> (making it finally three Ethernet connections and one TCX/SS24 - is this
> too much?)
>
> And i need the Sparc to display parts of the datastream (a live camera
> stream, for example). This stream is an uncompressed, raw pixelstream
> displayed with my own routines. Then a few diagnostics/infos/etc. need
> to be displayed. Last maybe a little bit serving (minimal) and a few
> other
> processes and calculations, related to the incoming data.
>
> So, am i asking too much from one Sparc? (Most workload will be bound to
> the SMP-RAID-PC, anyway. The Sparc should be the first head of the
> entire
> system. A second would follow, if above is possible)
>
>
> ok, bye for now,
>
>
> Mac
>
>
> P.S.: I assume that i don't need to take advantage of the gfx
> capabilities
> with special programming efforts. But if there are things i should be
> aware of when trying to build the mentioned stream processing - please
> let
> me know ;)
>
>
>
>
> --
> Markus Lechner (Company - LightWolf) | The
> Prometheus-Project
> Markus.Lechner@munich.netsurf.de |
> Mac@munich.netsurf.de
> http://home.munich.netsurf.de/Markus.Lechner | (only for
> Project-Team)
> PGP-Public-Key(s) are available |
>
>
> --
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>
Dave Broudy dave@broudy.net
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