DEVICE FOR STORING DATA, METHOD FOR SELECTING EXECUTION COMMAND, AND METHOD FOR PROCESSING DATA

摘要

PROBLEM TO BE SOLVED: To provide a method for selecting an execution command capable of improving performance when the depth of a queue is deep. SOLUTION: An execution standby time D1 of a command C1 exceeds the 1/4 cycle of a reference time CRT. An execution standby time D8 of a command C8 is 8/64 (1/4) cycle, and this fulfills requirements superior to reference time CRT. Also, the execution standby time D8 of the command C8 is not less than a scanning time SCN. Therefore, the command C8 is selected as a command to be selected the next. After this command is selected, the calculation of the execution standby time for any following command posterior to a command C9 is stopped. COPYRIGHT: (C)2004,JPO