Abstract: A mechanism is provided for scheduling virtual interfaces having at least one virtual interface scheduler, a virtual interface context cache and a pipeline with a number of processing units. The virtual interface scheduler is configured to send a lock request for a respective virtual interface to the virtual interface context cache. The virtual interface context cache is configured to lock a virtual interface context of the respective virtual interface and to send a lock token to the virtual interface scheduler in dependence on said lock request. The virtual interface context cache configured to hold a current lock token for the respective virtual interface context and to unlock the virtual interface context, if a lock token of an unlock request received from the pipeline matches the held current lock token.

Abstract: A system for I/O controller-processor interconnect coupling supporting a push-pull DMA read operation, in one aspect, may comprise a processor interconnect comprising a plurality of caches and memory subsystems and an I/O controller coupled with the processor interconnect. The I/O controller may comprise a plurality of DMA read request queues, a DMA read slot pool comprising a plurality of DMA read slots, and an expander logic determining a priority of requests in said request queues.

Abstract: A method for directing cache injection based on actual system load may include providing a snooping-based fabric having two or more bus-coupled units. At least one of the bus-coupled units may be configured as an injection unit for directing cache injection. A snoop request may be transmitted from the injection unit to one or more destination units of the other bus-coupled unit. The snoop request may include an identification value having a function identifier. The function identifier may identify a destination function for the cache injection, where the destination function is configured to run on the destination unit. A snoop response may be transmitted from the destination unit to the injection unit in response to the snoop request. The snoop response may include a function response value indicating whether the function identifier matches a function indication of a snoop register for the destination unit.