3 ms·
Does anybody know how "fast" a real DPS8M was? Compared to say a VAX? Is that a fair comparison? I know the last Multics site shutdown in 2000, DND in Halifax,
by sillywalk 3y ago
Does anybody know how "fast" a real DPS8M was? Compared to say a VAX? Is that a fair comparison?
I know the last Multics site shutdown in 2000, DND in Halifax, with 5 CPUs..
- unused0 3y agoAccording to wikipedia, the 6000s ran about 1 MIP and the DPS8/Ms topped out about 1.7 MIPS. Talking with people that worked on Multics, they generally say the 6000s were about 1 MIP.
- unused0 3y agoThe VAX had byte addressable memory, the DPS8/M word 36 bit word addressable, so I suspect that byte oriented instructions might have an edge on the VAX. Contrawise, the DPS8/M memory bus width was 72 bits, so it might have had an edge in double wide operations. I suspect the dominate factor would be that the DPS8/M was core memory at 1 us access time; I don't know the memory bandwidth of the VAX but I would assume it was faster.