Multiprocessor system and multigrain parallelizing compiler

A multiprocessor system having a plurality of processor units of single type or plural types, characterized by comprising:

• a clock supply unit for supplying one of a plurality of clock frequencies as a system clock to the processor units;
• a power supply unit for supplying one of a plurality of voltages as a clock voltage to the processor units;
• and
• a system control register for setting a system clock and a system voltage to be supplied to each processor unit, and in that
• one of the processor units sets, in the system control register, a system clock and a system voltage to be supplied to each processor unit, based on scheduling of parallel processing.