Dispatch input/output traffic to channels with multiple channel communication array queues

A system for queuing an input/output (I/O) operation in multi-queues, the system comprising:

• a memory comprising computer readable instructions;
• and
• a processing device for executing the computer readable instructions for performing a method, the method comprising:
• receiving, by a general purpose processor, the I/O operation;
• transmitting, by the general purpose processor, the I/O operation to a system assist processor;
• transmitting, by the system assist processor, the I/O operation to an I/O channel for execution by the I/O channel, wherein transmitting the I/O operation to the I/O channel comprises queuing the I/O operation in a first multi-queue, wherein the first multi-queue comprises a first plurality of queues dedicated to the I/O channel, and wherein the first multi-queue queues data sent from the system assist processor to the I/O channel;
• executing, by the I/O channel, the I/O operation;
• and
• responsive to completing the executing the I/O operation by the I/O channel, sending an acknowledgement of the completion to the system assist processor via a second multi-queue, wherein the second multi-queue comprises a second plurality of queues dedicated to the I/O channel, wherein the second plurality of queues of the second multi-queue differs from the first plurality of queues of the first multi-queue, and wherein the second multi-queue queues data sent from the I/O channel to the system assist processor.

A computer program product for queuing an input/output (I/O) operation in multi-queues, the computer program product comprising:

• a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processing device to cause the processing device to perform a method comprising:
• receiving, by a general purpose processor, the I/O operation;
• transmitting, by the general purpose processor, the I/O operation to a system assist processor;
• transmitting, by the system assist processor, the I/O operation to an I/O channel for execution by the I/O channel, wherein transmitting the I/O operation to the I/O channel comprises queuing the I/O operation in a first multi-queue, wherein the first multi-queue comprises a plurality of queues dedicated to the I/O channel, and wherein the first multi-queue queues data sent from the system assist processor to the I/O channel;
• executing, by the I/O channel, the I/O operation;
• and
• responsive to completing the executing the I/O operation by the I/O channel, sending an acknowledgement of the completion to the system assist processor via a second multi-queue, wherein the second multi-queue comprises a second plurality of queues dedicated to the I/O channel, wherein the second plurality of queues of the second multi-queue differs from the first plurality of queues of the first multi-queue, and wherein the second multi-queue queues data sent from the I/O channel to the system assist processor.