Abstract:
An Ethernet adapter system may include a transmitter to insert a payload type identifier sequence in a generic frame procedure header to indicate that a network is a converged enhanced Ethernet network. The transmitter may insert idle sequences in a stream of data frames transmitted along a link. The system may include a receiver to recognize a condition and to force a loss of synchronization condition on the link that will be converted by the receiver into a loss of light condition. The receiver may scan the transmitted stream of data frames for invalid data frames and introduce a code into the stream of data frames whenever an invalid data frame is detected.
Abstract:
Congestion is adaptively controlled in a data center Ethernet (DCE) network. Packets are received over at least one virtual lane in the DCE network. An absolute or relative packet arrival rate is computed over a time period. The absolute or relative packet arrival rate is compared to at least a first threshold and a second threshold. If the absolute or relative packet arrival rate increases beyond the first threshold, the packet transmission rate is caused to decrease. If the absolute or relative packet arrival rate is less than a second threshold, the packet transmission rate is caused to increase.
Abstract:
One or more message signaled interruption requests from one or more input/output (I/O) adapters are converted to I/O adapter event notifications. Each I/O adapter event notification includes the setting of one or more specific indicators in system memory and an interruption request, the first of which results in a pending I/O adapter interruption request. While a request for an I/O adapter interruption is pending, subsequent message signaled interruption requests are converted to I/O adapter event notifications, but do not result in additional requests for I/O adapter interruptions.
Abstract:
Congestion is adaptively controlled in a data center Ethernet (DCE) network. Packets are received over at least one virtual lane in the DCE network. An absolute or relative packet arrival rate is computed over a time period. The absolute or relative packet arrival rate is compared to at least a first threshold and a second threshold. If the absolute or relative packet arrival rate increases beyond the first threshold, the packet transmission rate is caused to decrease. If the absolute or relative packet arrival rate is less than a second threshold, the packet transmission rate is caused to increase.
Abstract:
Un método para habilitar adaptadores en un entorno de ordenadores, que comprende las etapas de: responder para ejecutar una instrucción de Procesador Lógico de Llamada CLP (400) expedida por un sistema operativo para habilitar un adaptador seleccionado por el sistema operativo, comprendiendo la instrucción CLP un identificador de función (426) que identifica el adaptador y que tiene 5 un indicador de adaptador no habilitado (352), solicitando la instrucción CLP un número de espacios de direcciones de acceso directo a memoria DMA (430) para ser asignados al adaptador, habilitando la ejecución uno o más espacios de dirección DMA y que comprende: a) habilitar el adaptador, en donde la habilitación comprende habilitar el registro para la traducción e interrupción de dirección para el soporte de accesos de memoria directos e interrupciones señalizadas con mensaje para el adaptador, y en donde la habilitación comprende determinar (512) que el número de de espacios de dirección DMA solicitados está disponible comprobando que hay entradas de tabla de dispositivo para el número de espacios de dirección DMA solicitado, y asignar (542) un número de entradas de tabla de dispositivo, correspondiente al número de espacios de dirección de DMA solicitado, al adaptador; y b) devolver (550) el identificador de función que tiene un indicador de adaptador habilitado.
Abstract:
The conditions under which adapter interruptions are made pending are controlled. Responsive to an interruption being presented to an operating system, subsequent interruptions are suppressed on all central processing units in the configuration. The operating system processes the interruption, including examining and processing indicators of reported events until the operating system discontinues the suppression. This enables the operating system to control the number of pending interruptions and the number of processors processing those interruptions.
Abstract:
Communication with adapters of a computing environment is facilitated. Control instructions specifically designed for communicating data to and from adapters are provided to facilitate the communication. The instructions explicitly target the adapters. Information provided in an instruction is used to steer the instruction to an appropriate location within the adapter, such as a Peripheral Component Interconnect (PCI) or Peripheral Component Interconnect Express (PCIe) adapter.