Inter-program Compilation for Disk Energy Reduction

Compiler support for power and energy management has been shown to be effective in reducing overall power dissipation and energy consumption of individual programs, for instance through compilerdirected resource hibernation and dynamic frequency and voltage scaling (DVS). Typically, optimizing compilers perform intra-program analyses and optimizations, i.e., optimize the input program without the knowledge of other programs that may be running at the same time on the particular target machine. In this paper, we investigate the opportunities of compiling sets of programs together as a group with the goal of reducing overall disk energy. A preliminary study and simulation results for this inter-program compilation approach shows that significant disk energy can be saved (between 5% and 16%) over the individually, disk energy optimized programs for three benchmark applications.