Memory module threading with staggered data transfers

A memory module, comprising:

• a substrate;
• buffer circuitry disposed on the substrate, the buffer circuitry for coupling to a primary data bus having a primary data bus width, the primary data bus to route data of a primary data transfer continuous throughput;
• plural memory device groups coupled to the buffer circuitry via respective secondary data bus paths, each of the plural memory device groups having a continuous throughput smaller than the primary data transfer continuous throughput, each of the plural memory device groups responsive to a memory request to transfer data groups collectively forming a data thread, the plural memory device groups isolated from the primary data bus by the buffer circuitry;
• and
• wherein the buffer circuitry includes steering logic to stagger transfer of multiple data groups from a first data thread across the primary data bus, and to stagger transfer of multiple data groups from a second data thread across the primary data bus.

A memory, comprising:

• at least one memory module for coupling to a memory controller via a primary data bus;
• wherein the at least one memory module includes
• a substrate;
• buffer circuitry disposed on the substrate, the buffer circuitry including a primary interface for coupling to a primary data bus, the primary data bus to route data of a primary data transfer continuous throughput;
• plural memory device groups coupled to the buffer circuitry via respective secondary data bus paths, each of the plural memory device groups having a continuous throughput smaller than the primary data transfer continuous throughput, each of the plural memory device groups responsive to a memory request to transfer data groups collectively forming a data thread, the plural memory device groups isolated from the primary data bus by the buffer circuitry;
• and
• wherein the buffer circuitry includes steering logic to stagger transfer of multiple data groups from a first data thread across the primary data bus, and to stagger transfer of multiple data groups from a second data thread across the primary data bus.

A method of operating a memory module having a substrate, buffer circuitry disposed on the substrate for coupling to a primary data bus, the primary data bus to route data of a primary data transfer continuous throughput, the method comprising:

• receiving a memory request to transfer data groups from plural memory device groups, the data groups collectively forming a data thread:
• staggering transfer of multiple data groups from a first data thread across the primary data bus;
• and
• staggering transfer of multiple data groups from a second data thread across the primary data bus.