One embodiment of the present invention provides a system that facilitates
selectively increasing the operating frequency of an electronic circuit,
such as a computer system. The system begins by operating in a low-power
state with the frequency and voltage of the electronic circuit set to low
levels. Upon recognizing the need for performance beyond the low power
level, the electronic circuit enters the first-intermediate power state.
In this first-intermediate power state, the frequency and voltage are set
to first-intermediate levels. Upon recognizing the need for performance
beyond the first-intermediate power state, the electronic circuit enters
the maximum-sustainable power state. In this power state, the frequency
and voltage are set to maximum sustainable levels. Upon recognizing the
need for performance beyond the maximum-sustainable power state, the
electronic circuit temporarily enters a boosted power state beyond the
maximum-sustainable power state. In this boosted power state, the
frequency and voltages are set to levels beyond the maximum sustainable
levels.