Apparatus and machine for reducing power consumption of memory including a plurality of segment areas, method therefore and non-transitory computer readable medium

摘要

According to an embodiment, there is provided with a non-transitory computer readable medium having instructions stored therein, which, when executed by a computer, causes the computer to execute steps including: calculating an access load on a memory area including a plurality of segment areas and determining, for each of the segment areas, one of a plurality of power states including a first power state and a second power state with its power consumption being lower than that of the first power state in accordance with the access load; and setting each of the segment areas to the power state determined therefor.

主权项

1. A non-transitory computer readable medium having instructions stored therein which, when executed by a computer, cause the computer to execute at least:
storing, in a storage, an access count for each of a plurality of segment areas in a memory area; calculating an access load corresponding to an access frequency for each segment area based on each access count for each segment area and comparing the access load of each segment area with a threshold value corresponding to each segment area to determine a state of each segment area as one of a plurality of power states including a first power state and a second power state having a power consumption lower than that of the first power state; and setting each segment area to the power state determined for the segment area, wherein the threshold value corresponding to each segment area is defined in accordance with a first power value for keeping the segment area in the first power state, a second power value for keeping the segment area in the second power state, a third power value for transitioning the segment area from the first power state to the second power state, and a fourth power value for transitioning the segment area from the second power state to the first power state, and wherein the threshold value corresponding to each segment area is obtained by dividing a difference between the second power value and the first power value by a sum of the third power value and the fourth power value.