Abstract: In PCI-Express and alike communications systems, data bandwidth per channel can vary as a result of negotiated port aggregation and/or bifurcation during network bring-up. Disclosed are systems and methods for opportunistically interleaving dispatches of packet data for secondary egress channels when the data bandwidth of a primary egress channel is relatively small and thus creates slack on a dispatch bus between dispatches of primary data blocks.

Abstract: In PCI-Express and alike communications systems, data bandwidth per channel can vary as a result of negotiated port bifurcation during network bring-up. Disclosed are systems and methods for adjusting FIFO depths in response to negotiated bandwidth per channel so that data absorbing FIFO's of respective channels are not arbitrarily too deep or too shallow relative to the data bandwidths of the channels the FIFO's serve.

Abstract: There are disclosed a method and apparatus for reordering sequenced data packets. An expiration time is calculated for each received data packet. The expiration time and a packet sequence number are stored in a table. The table is read to determine the next data packet to be transmitted in sequence number order. The next data packet is output if available. If the next data packet is not available, a true expiration time is determined for the unavailable next data packet. If the unavailable next data packet fails to arrive before a current time is greater than the expiration time of the unavailable data packet, the unavailable next data packet is considered lost.

Abstract: System for reordering sequenced based packets in a switching network. The system includes time stamp logic that operates to associate a receive time indicator with each received data packet. The system also includes Enqueue logic that operates to compute an expiration time for each received packet based on the receive time indicator, and stores the expiration time and the sequence identifier for each received packet into a table. Dequeue logic operates to read the table to determine the received data packets to output in an output stream so that the received data packets are output in a selected order. The Dequeue logic also operates to determine a true expiration time for one or more unreceived data packets, and if the true expiration time for a selected unreceived data packet is reached, the Dequeue logic operates to omit the selected unreceived data packet from the output stream.

Abstract: There is disclosed a bus optimization technique. Pursuant to the bus optimization technique, the output buffer and output logic are removed from port units of a switch and are included with a control matrix in the switch. Data units received in a first port unit of a plurality of port units are provided to a control matrix. The control matrix evaluates when to send the data unit to a second port unit. No output decisions are made in the second port unit.

Abstract: There is disclosed a bus optimization technique. Pursuant to the bus optimization technique, the output buffer and output logic are removed from port units of a switch and are included with a control matrix in the switch. Data units received in a first port unit of a plurality of port units are provided to a control matrix. The control matrix evaluates when to send the data unit to a second port unit. No output decisions are made in the second port unit.

Abstract: There is disclosed a bus optimization technique. Pursuant to the bus optimization technique, the output buffer and output logic are removed from port units of a switch and are included with a control matrix in the switch. Data units received in a first port unit of a plurality of port units are provided to a control matrix. The control matrix evaluates when to send the data unit to a second port unit. No output decisions are made in the second port unit.

Abstract: In PCI-Express and alike communications systems, data bandwidth per channel can vary as a result of negotiated port aggregation and/or bifurcation during network bring-up. Disclosed are systems and methods for opportunistically interleaving dispatches of packet data for secondary egress channels when the data bandwidth of a primary egress channel is relatively small and thus creates slack on a dispatch bus between dispatches of primary data blocks.

Abstract: In PCI-Express and alike communications systems, data bandwidth per channel can vary as a result of negotiated port bifurcation during network bring-up. Disclosed are systems and methods for adjusting FIFO depths in response to negotiated bandwidth per channel so that data absorbing FIFO's of respective channels are not arbitrarily too deep or too shallow relative to the data bandwidths of the channels the FIFO's serve.

Abstract: System for reordering sequenced based packets in a switching network. The system includes time stamp logic that operates to associate a receive time indicator with each received data packet. The system also includes Enqueue logic that operates to compute an expiration time for each received packet based on the receive time indicator, and stores the expiration time and the sequence identifier for each received packet into a table. Dequeue logic operates to read the table to determine the received data packets to output in an output stream so that the received data packets are output in a selected order. The Dequeue logic also operates to determine a true expiration time for one or more unreceived data packets, and if the true expiration time for a selected unreceived data packet is reached, the Dequeue logic operates to omit the selected unreceived data packet from the output stream.

Abstract: There are disclosed a method and apparatus for reordering sequenced data packets. An expiration time is calculated for each received data packet. The expiration time and a packet sequence number are stored in a table. The table is read to determine the next data packet to be transmitted in sequence number order. The next data packet is output if available. If the next data packet is not available, a true expiration time is determined for the unavailable next data packet. If the unavailable next data packet fails to arrive before a current time is greater than the expiration time of the unavailable data packet, the unavailable next data packet is considered lost.

Abstract: There is disclosed a bus optimization technique. Pursuant to the bus optimization technique, the output buffer and output logic are removed from port units of a switch and are included with a control matrix in the switch. Data units received in a first port unit of a plurality of port units are provided to a control matrix. The control matrix evaluates when to send the data unit to a second port unit. No output decisions are made in the second port unit.

Abstract: System for reordering sequenced based packets in a switching network. The system includes time stamp logic that operates to associate a receive time indicator with each received data packet. The system also includes Enqueue logic that operates to compute an expiration time for each received packet based on the receive time indicator, and stores the expiration time and the sequence identifier for each received packet into a table. Dequeue logic operates to read the table to determine the received data packets to output in an output stream so that the received data packets are output in a selected order. The Dequeue logic also operates to determine a true expiration time for one or more unreceived data packets, and if the true expiration time for a selected unreceived data packet is reached, the Dequeue logic operates to omit the selected unreceived data packet from the output stream.