| 摘要 |
<p>The Scalable Coherent Interface (SCI) standard of the IEEE is intended for fast, high throughput, unidirectional links to high-performance multiprocessor systems. All switches accumulate transitions of the allocation bits to a value that is different from the current remembered allocation value on each enabled input ports (0-7). If the network is out of allocation bit synchronization at a switch when a second transition of allocation bit occurs in an input port (0-7) of the switch, the transition is ignored. The switch declares agreement when all input ports (0-7) have made at least one transition even though the current allocation bit values at the input ports (0-7) are not in agreement. This procedure allows rows that are one idle allocation value behind to advance their values while preventing other rows from advancing their values, which enables resynchronization of the idle allocation values after network idle allocation synchronization has been lost.</p> |
