Analysis of dynamic power management on multi-core processors
作者： W Lloyd Bircher , Lizy K John , None
关键词:
摘要: Power management of multi-core processors is extremely important because it allows power/energy savings when all cores are not used. OS directed power according to ACPI (Advanced and Configurations Interface) specifications the common approach that industry has adopted for this purpose. While operating systems capable such management, heuristics effectively managing still evolving. The granularity at which slowed down/turned off should be designed considering phase behavior workloads. Using 3-D, video creation, office e-learning applications from SYSmark benchmark suite, we study challenges in a processor as AMD Quad-Core Opteron" Phenom". We unveil effects idle core frequency on performance active cores. adjust have least detrimental effect performance. present optimized hardware system configurations reduce average by 30% while reducing an less than 3%. also complete measurements breakdown between various components using SPEC CPU It observed disk consume most power, with having highest variability.
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