Split-SMP computer system with local domains and a top repeater that distinguishes local and global transactions

A method for operating a multiprocessing computer system comprising:

• receiving a first transaction in a first repeater from a first processor within a first local domain of said multiprocessing computer system;
• transmitting said first transaction from said first repeater to a second processor within a second local domain of said multiprocessing computer system if said first transaction is a global transaction;
• and
• inhibiting transmission of said first transaction to said second processor if said first transaction is a local transaction.

A multiprocessing computer system comprising:

• a first repeater;
• a first local domain comprising a second repeater coupled to said first repeater and a third repeater coupled to
• said first repeater, wherein said second repeater is coupled to a first plurality of processors and a first memory, and wherein said third repeater is coupled to a second plurality of processors and a second memory;
• and
• a second local domain comprising a fourth repeater coupled to said first repeater and a fifth repeater coupled to said first repeater, wherein said fourth repeater is coupled to a third plurality of processors and a third memory, and wherein said fifth repeater is coupled to a fourth plurality of processors and a fourth memory;
• wherein said first repeater is configured to transmit a first transaction from said first local domain to said second local domain if said first transaction is global, and wherein said first repeater is configured to route said first transaction to said second and third repeaters within said first local domain.