tzeng@sunland.gsfc.nasa.gov (Nigel Tzeng) (05/07/91)
Hi! We're getting a demo A3000UXD RSN from the Commodore Federal Systems Group in Reston VA. We like to run a few benchmarks against a Sun 3 that is around here and maybe (if we can find one) a dec station. Granted that the numbers are likely to be mostly bogus for real comparisons but I'd like to humor my boss ;-). Could someone give me a list of the most common and the most useful benchmarks to run on both platforms (Sun and Ami). If someone could also give me a quick rundown on the max data rate the Zorro bus can support it would be a big help. We write ground systems for NASA so being able to gobble (and display) data at a fast rate is a real plus. At the moment the max downlink rate is 900Kbits...which means that we need roughly double that. Thanks! BTW: For anyone in the DC area that wants a demo the people at New Age Computers (College Park) do a credible job. NT ---- Nigel Tzeng - STX - SMEX Project tzeng@sunland.gsfc.nasa.gov nigel@eagle.gsfc.nasa.gov
daveh@cbmvax.commodore.com (Dave Haynie) (05/09/91)
In article <TZENG.91May7101827@sunland.gsfc.nasa.gov> tzeng@sunland.gsfc.nasa.gov (Nigel Tzeng) writes: >Hi! >If someone could also give me a quick rundown on the max data rate the >Zorro bus can support it would be a big help. We write ground systems >for NASA so being able to gobble (and display) data at a fast rate is >a real plus. At the moment the max downlink rate is 900Kbits...which >means that we need roughly double that. The Zorro II bus runs at roughly 3.5 Megabytes/second. The Zorro III bus interface to the A3000 peaks at about 20 Megabytes/second. So even using some kind of programmed I/O device on the Zorro III bus, you can get around 10 Megabytes/second throughput, which is about 45 times more bandwidth than you apparently need. Most good I/O devices do some local buffering to keep down the interrupt overhead. >Nigel Tzeng - STX - SMEX Project -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "That's me in the corner, that's me in the spotlight" -R.E.M.