In one embodiment, a system includes a peripheral data connection bus configured to connect to devices and transfer data between the devices, a scheduling machine configured to connect to the peripheral data connection bus and send a read request message to a first processing device, and the first processing device configured to be connected to the peripheral data connection bus, and responsively to the read request message add a time value to a read response message, and provide the read response message to the scheduling machine, and wherein the scheduling machine is configured to read the time value from the provided read response message and schedule processing of an operation by a second processing device responsively to the read time value.