A number of command processing devices, architectures, and methods are described. One example of a command processing device is disclosed to include a classification engine configured to classify input commands, a sequencer in communication with the classification engine, one or more thread managers in communication with the sequencer, and one or more sub-processing engines in communication with each of the one or more thread managers. The sequencer may control staging of work across multiple threads and processing elements within threads. Each of the one or more thread managers are configured to delegate work to different sub-processing engines. Each of the one or more sub-processing engines are configured to perform sub-tasks in connection with completing processing of an input command received at the classification engine based on particular sub-tasks assigned to the one or more sub-processing engines by the one or more thread managers.