Abstract: A method and system are disclosed for network adaptor optimization and interrupt reduction. The method may also build an outbound buffer list based on outgoing data and add the outgoing data to an outbound buffer queue. Furthermore, the method may set a buffer state from an empty state to a primed state to indicate that the outgoing data is prepared for transmitting and signal a network adaptor with a notification signal.

Abstract: A data connection of a shared resource is placed in isolation mode to remove its ability to communicate with other data connections of the shared resource. This ability to isolate the data connection is dynamic in that it can be turned on/off at any time. This provides increased data security for the entities using the data connection.

Abstract: A data connection of a shared resource is placed in isolation mode to remove its ability to communicate with other data connections of the shared resource. This ability to isolate the data connection is dynamic in that it can be turned on/off at any time. This provides increased data security for the entities using the data connection.

Abstract: A method, computer program product, and device are provided for transparent separation of traffic. A communication interface is configured to transmit and receive traffic over a network. A stack is configured to dynamically identify the traffic as interactive traffic and non-interactive traffic. When the stack identifies the non-interactive traffic, the stack is configured to move the non-interactive traffic to a non-interactive queue.

Abstract: Data received over a shared network interface is directly placed by the shared network interface in a designated memory area of a host. In providing this direct memory access, the incoming data packets are split, such that the headers are separated from the data. The headers are placed in a designated area of a memory buffer of the host. Additionally, the data is stored in contiguous locations within the buffer. This receive and store is performed without interruption to the host. Then, at a defined time, the host is interrupted to indicate the receipt and direct storage of the data.

Abstract: The emulation of a data processing I/O protocol employs a process which obviates the need to consider hardware specific functionality for which emulation is not an optimal solution. The particular protocol described in exemplary fashion herein is the OSA protocol as defined by Open System Adapter standards. The use of this emulation is also seen to leave in place all of the software tools otherwise employed.

Abstract: A method and system are disclosed for network adaptor optimization and interrupt reduction. The method may generate an immediate I/O interrupt notification to a host device driver in response to receiving data from a network. The method may also update an inbound buffer list based on the received data in the inbound buffer queue. Furthermore, the method may set the buffer state from an empty state to a primed state to indicate that the received data is available for processing. The method may also build an outbound buffer list based on outgoing data and add the outgoing data to an outbound buffer queue. Furthermore, the method may set a buffer state from an empty state to a primed state to indicate that the outgoing data is prepared for transmitting and signal a network adaptor with a notification signal.

Abstract: Partitioning of a variable length scatter gather list including a processor for performing a method that includes requesting data from an I/O device comprising an I/O buffer. The requesting includes initiating a subchannel. The method further includes determining whether the subchannel supports data divisions by requesting SSQD data from the I/O device and inspecting at least one bit in the SSQD data. A determination is made whether the requested data includes a metadata block in response to determining that the subchannel support data divisions. Also, the subchannel is notified that the requested data includes the metadata block in response to determining that the requested data includes the metadata block. A location of storage is identified in an SBAL in response to notifying the subchannel.

Abstract: System aware performance counters including a processor for performing a method that includes executing a predefined code segment of an application, the executing on a processor. The executing includes executing an instrumented thread included in the predefined code segment. The method includes performing a first action associated with executing the instrumented thread in the predefined code segment, and registering the instrumented thread. A performance counter associated with the predefined code segment is started. Also, the execution of the predefined code segment is paused and the performance counter is paused. The method further includes performing a second action associated with pausing the executing of the predefined code segment. The executing of the predefined code segment is resumed and the performance counter is resumed responsive to resuming the executing of the predefined code segment. Also, a third action associated with resuming executing the predefined code segment is performed.

Abstract: The emulation of a data processing I/O protocol employs a process which obviates the need to consider hardware specific functionality for which emulation is not an optimal solution. The particular protocol described in exemplary fashion herein is the OSA protocol as defined by Open System Adapter standards. The use of this emulation is also seen to leave in place all of the software tools otherwise employed.

Abstract: The emulation of an adapter for I/O to link a host data processing system to a local area network provides advantages of memory to memory transfer which results in higher data transfer rates while at the same time providing a mechanism for working with two data transfer vectors in an overlapping fashion.

Abstract: The emulation of a data processing I/O protocol employs a process which obviates the need to consider hardware specific functionality for which emulation is not an optimal solution. The particular protocol described in exemplary fashion herein is the OSA protocol as defined by Open System Adapter standards. The use of this emulation is also seen to leave in place all of the software tools otherwise employed.

Abstract: A method, computer program product, and device are provided for transparent separation of traffic. A communication interface is configured to transmit and receive traffic over a network. A stack is configured to dynamically identify the traffic as interactive traffic and non-interactive traffic. When the stack identifies the non-interactive traffic, the stack is configured to move the non-interactive traffic to a non-interactive queue.

Abstract: A method, transceiver, and computer program storage product transfer data over fiber between a first transceiver and a second transceiver. The second transceiver is determined to support a high integrity cyclic redundancy check associated with substantially an entire data set in a Fiber Channel Protocol exchange between the first transceiver and the second transceiver. A last data frame in a plurality of data frames is formatted for communication to the second transceiver during the Fiber Channel Protocol exchange. The last data frame includes a plurality of data and at least one cyclic redundancy check field associated with the plurality data and at least one additional cyclic redundancy check field associated with the plurality of data frames.

Abstract: Computer program products and methods for efficient handling of queued-direct input/output (QDIO) requests and completions at an adapter in communication with an I/O device are provided. A method includes accessing a queue with one or more storage block address lists (SBALs), where each SBAL includes a plurality of storage block address list entries (SBALEs) and is associated with an SLSB. The method further includes reading an SBAL count in one of the SBALEs, where the SBAL count indicates a number of the SBALs forming an I/O request to the I/O device. In response to determining that the SBAL count is greater than one, a number of the SBALs from the queue and associated SLSBs equivalent to the SBAL count are prefetched without waiting for a notification of completion of each of the SBALs forming the I/O request, and states of the associated SLSBs transition from adapter-owned to program-owned.

Abstract: Creating a unique identification for each stack in partitions of a host data computer such that a plurality of partitions may share a single adapter card during an Input/Output operation wherein the adapter card is exchanging data between the host and a Local Area Network. The adapter card includes a unique identifier pool for maintaining values of unique identifiers which are available for identifying the stacks. A deleted unique identifier for a stack may be reused by newly created stacks and may be reassigned to a recreated stack, if still available, when the stack had previously been deleted by the operating system, but is then recreated.

Abstract: Data received over a shared network interface is directly placed by the shared network interface in a designated memory area of a host. In providing this direct memory access, the incoming data packets are split, such that the headers are separated from the data. The headers are placed in a designated area of a memory buffer of the host. Additionally, the data is stored in contiguous locations within the buffer. This receive and store is performed without interruption to the host. Then, at a defined time, the host is interrupted to indicate the receipt and direct storage of the data.

Abstract: Computer program products and methods for efficient handling of queued-direct input/output (QDIO) requests and completions at an adapter in communication with an I/O device are provided. A method includes accessing a queue with one or more storage block address lists (SBALs), where each SBAL includes a plurality of storage block address list entries (SBALEs) and is associated with an SLSB. The method further includes reading an SBAL count in one of the SBALEs, where the SBAL count indicates a number of the SBALs forming an I/O request to the I/O device. In response to determining that the SBAL count is greater than one, a number of the SBALs from the queue and associated SLSBs equivalent to the SBAL count are prefetched without waiting for a notification of completion of each of the SBALs forming the I/O request, and states of the associated SLSBs transition from adapter-owned to program-owned.

Abstract: An incoming LAN traffic management system comprising: an I/O adapter configured to receive incoming packets from an Ethernet; a plurality of hosts coupled to the I/O adapter and each having a host buffer; a data router configured to block information received by the I/O adapter into memory locations from an SBAL associated with at least one of the plurality of hosts and in accordance with blocking parameters for the at least one of the plurality of hosts, the data router including an expiration engine configured to expire the SBAL before it is full if at least one predetermined threshold is exceeded.

Abstract: A method of Ethernet virtualization using network packet alteration. The method comprises receiving network packets from a host destined for transmission over a network, checking whether the network packets have headers, if the packets do not have headers, forming a first portion of the header using firmware, storing the formed packet and header to a first memory; and forming a second portion of the header using programmable logic.