G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 9/46 (2006.01) G06F 9/48 (2006.01)
Patent
CA 2200929
A scheduling method of a periodic process of a computer system for keeping the execution interval- of each process group constant as far as possible in the case where a plurality of process groups including periodically executed processes are executed in parallel. If a group master process of each process group specifies a wakeup interval period and a required CPU time per period and requests allocation of a CPU time, then a CPU allocation time of a specified process group is secured so as not to collide with a CPU allocation time of another process group, and a scheduling table is created so as to maintain the specified wakeup interval period. In response to arrival of time when one of the process groups should be waked up, a kernel process or a scheduler conducts wakeup by changing execution priority of a process belonging to this process group to highest priority ("raised") in the system, and thereafter maintains the highest priority for CPU allocation time consecutively allocated.
Iwasaki Masaaki
Nakahara Masahiko
Nakano Takahiro
Takeuchi Tadashi
Hitachi Ltd.
Kirby Eades Gale Baker
LandOfFree
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