PCIe NTB stands for PCI Express Non-Transparent Bridge. It is a type of bridge that connects two or more PCIe devices together, allowing them to communicate with each other over a high-speed PCIe interconnect.
NTBs are used in systems where multiple processors need to access the same memory or I/O resources, such as in high-performance computing (HPC), data centers, and cloud computing environments. They provide a low-latency, high-bandwidth interconnect between the processors and enable efficient communication between them.
Unlike transparent bridges, which simply pass through all traffic between connected devices without modifying it, NTBs can perform various functions such as caching and message routing to optimize performance and reduce latency. They can also support features like error detection and correction, multicast messaging, and virtualization.
Overall, PCIe NTBs play an important role in enabling high-performance computing systems to scale effectively and efficiently while maintaining low latencies and high bandwidths.
