Abstract: A computer program product, apparatus and method for buffer discovery in a multi-tasking multi-processor environment. An exemplary embodiment includes establishing a management connection, confirming that end points of the management connection are connected to respective targets, sending a negotiate counts message, including a number and size of buffers associated with parameters of the management connection and receiving a response to the negotiate counts message, the response including at least one of rejection of the management connection and an acceptance of the management connection, including an agreed number and size of the buffers.

Abstract: A computer program product, apparatus and method for identifying processors in a multi-tasking multiprocessor network, the computer program product including a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method including storing a service record for a port to which an LID has been assigned, retrieving service records for nodes to which channel paths may connect, retrieving path records that provide address destinations for the nodes identified in the service records, initiating channel initialization for the channel paths defined for the port and removing the service record for the port.

Abstract: A computer program product, apparatus and method for managing recovery of a link in a multi-tasking multi-processor environment. An exemplary embodiment includes shutting off timers for a failed channel associated with the communications link, storing a loss of link condition in a data structure, disabling communications on the failed channel and sending an external notification of the loss of link condition.

Abstract: A system and method that utilizes a dedicated transmission queue to enable expedited transmission of data messages to adaptive “nearest neighbor” nodes within a cluster. Packet descriptors are pre-fetched by the communications adapter hardware during the transmission of the preceding data element and setup for the next transmission is performed in parallel with the transmission of the preceding data element. Data elements of a fixed length that is equal to the cache line size of the communication hardware can optionally be used to provide optimized transfer between computer memory and communications hardware. The data receiving processing can also be optimized to recognize and handle cache line size data elements.

Abstract: In remote direct memory access (RDMA) transfers in a multinode data processing system in which the nodes communicate with one another through communication adapters coupled to a switch or network, there is a need for the system to ensure efficient memory protection mechanisms across jobs. A method is thus desired for addressing virtual memory on local and remote servers that is independent of the process ID on the local and/or remote node. The use of global Translation Control Entry (TCE) tables that are accessed/owned by RDMA jobs and are managed by a device driver in conjunction with a Protocol Virtual Offset (PVO) address format solves this problem.