Wolfgang Karl SS 2001 5 SCI-based PC clusters  Bus-like services: read-, write-, and synchronization transactions  Hardware-supported DSM with low-latency remote memory access and fast message-passing  Split-transactions: request and response packets - latency hiding Global address space SCI interconnect PCs with PCI-SCI adapter
{"Image DocumentName": "SCI-based PC clustersPCs with. PCI-SCI adapter. SCI interconnect. Global address space.", "Image ImageDescription": "Bus-like services: read-, write-, and synchronization transactions. Hardware-supported DSM with low-latency remote memory access and fast message-passing. Split-transactions: request and response packets - latency hiding. A 64 Bit global address space across SCI nodes is defined as well as set of read, write, and synchronization transactions, enabling SCI based systems to provide a hardware supported DSM with low-latency remote memory accesses.In addition to the communication via DSM SCI also provides fast message passing. The logical layer of SCI defines a packet switched communication protocol. AN SCI split transaction requires a request package to be sent from an SCI node to another node with a response packet in reply to it. Several SCI transaction can be overlapped, so that latencies are hidden. The core feature of SCI based networks are the ability to perform remote memory accesses through direct hardware DSM support.For cluster systems, this hardware support is provided by a SCI network adapter plugged into the system or PCI bus of every PC. A global SCI physical address space is set up allowing the addressing of any physical memory location on any node via a 64 Bit identifier. Wolfgang Karl. SS 2001.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}