| 摘要 |
PURPOSE:To allow the clocks of all processors to point out the same time within the range of a certain synchronizing accuracy by allowing each processor to control its own clock based upon all clock information arriving every generation of a time interruption. CONSTITUTION:After measuring a random time within a previously determined time range, a timer generates a time-out, each of processors 301 to 305 starts the timer at the time of a generation of a time interruption. When the time-out generating time is before the generation of a time interruption, each of the processors 301 to 305 sends its own clock shown in its parentheses to all the processors 301 to 305 at the time of generating a time-out. In addition, each of the processors 301 to 305 controls its own clock based upon all clock information arriving every generation of a time interruption. Even when the number of processors in the system is increased, the increment of processing overhead due to the sharp increment of the number of communication message is not generated and the total number of messages in the system can be reduced. |
