Mechanism to queue multiple streams to run on streaming engine

A system comprising:

• a set of functional units;
• a memory;
• and
• a streaming engine coupled between the set of functional units and the memory, wherein the streaming engine includes a stream queue buffer and is configured to:
• receive a first stream open command that specifies a speculative mode;
• store an indication of the first stream open command in the stream queue buffer;
• receive a second stream open command;
• store an indication of the second stream open command in the stream queue buffer;
• based on the second stream open command, determine whether the first stream open command is associated with the speculative mode;
• and
• based on the first stream open command being associated with the speculative mode, cancel the first stream open command while the indication of the first stream open command is in the stream queue buffer by propagating the indication of the first stream open command to an end of the stream queue buffer and thereafter cancelling the first stream open command.