System for computing cumulative amount of data received by all RDMA to determine when a complete data transfer has arrived at receiving device

A reading device including a plurality of RDMA engines each adapted to receive data packets of a transaction on a respective communication channel and each being responsive to receiving on the respective communication channel a final packet associated with the transaction for:

• (a) generating an interrupt such that a single interrupt is generated is for each RDMA engine receiving data,
• (b) reporting to the reading device an amount of data received on the respective communication channel, and
• (c) computing a cumulative amount of data received by all RDMA engines that have generated respective interrupts.

A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for transmitting data along one or more communication channels to a receiving device having memory units so as to allow the receiving device to determine when a complete data transfer has arrived, the data having a known size and being split into two or more data packets each having a respective header and each sent along one of said communication channels to a respective memory unit, the method comprising:

• (a) marking a respective final data packet to be sent along each communication channel so as to be identifiable by a respective memory unit,
• (b) for each memory unit receiving said respective final data packet generating an interrupt such that a single interrupt is generated for each memory unit receiving data and informing the receiving device how much data was received by said memory unit, and
• (c) determining a cumulative amount of data received by all memory units so as to allow the reading device to identify when no more data packets are to be transmitted.

A computer program product comprising a computer useable medium having computer readable program code embodied therein for transmitting data along one or more communication channels to a receiving device having memory units so as to allow the receiving device to determine when a complete data transfer has arrived, the data having a known size and being split into two or more data packets each having a respective header and each sent along one of said communication channels to a respective memory unit, the computer program product comprising:

• computer readable program code for causing the computer to mark a respective final data packet to be sent along each communication channel so as to be identifiable by a respective memory unit,
• computer readable program code for each memory unit to generate an interrupt responsive to receipt of said respective final data packet such that a single interrupt is generated for each memory unit receiving data and to inform the receiving device how much data was received by said memory unit, and
• computer readable program code for causing the computer to determine a cumulative amount of data received by all memory units so as to allow the reading device to identify when no more data packets are to be transmitted.