Intel QuickPath Interconnect notes
本文主要记录QuickPath Interconnect(QPI)相关notes。
background
front-side bus(FSB)连接着CPU与北桥。
motivation
The previous generation of processors used slower, parallel front-side-bus architectures. Intel QuickPath Technology accelerates the flow of data by introducing multiple pairs of high-speed serial links. By grouping several paths together with intelligent management, Intel QuickPath Technology can deliver up to 25.6 GB/s between components and maintain communications even when a link fails.
architecture
Point-to-Point Links Speed Up Data Movement
Intel QuickPath Technology uses Intel QuickPath Interconnect, which provides high-speed, point-to-point links inside and outside of the processor. In contrast to parallel buses, these links speed up data transfers by connecting distributed shared memory, the internal cores, the I/O hub, and other Intel® processors.
Integrated memory controllers and Intel QuickPath Technology work together to deliver:
- Scalable, high-performance communications
- Outstanding memory performance and flexibility to support leading memory technologies
- Tightly integrated interconnect reliability, availability, and serviceability (RAS)
- Configurations allowing optimal balance of price, performance, and energy efficiency
参考资料：