HP ProLiant DL288 ISS Technology Update Volume 8, Number 6 - Page 3

ISS Technology Update 20% 10% Active idle Overall operations per watt 20.1% 10.0% 108,342 54,143 0 Volume 8, Number 6 153 710 134 403 124 0 1,394 Calculating and interpreting SPECpower_ssj2008 results The SPECpower_ssj2008 benchmark generates a final metric that is the overall operations-per-watt. This number is calculated by adding together the number of Java operations performed at each target load and dividing this number by the sum of the power consumptions at each target load. Thus, the overall operations-per-watt is an equally weighted average of the performance to power ratio taken across the entire operating range of the server. Overall operations-per-watt is useful for a general comparison of performance and power between servers; however, it may be too broad a metric when considering specific application scenarios or utilization levels. If it is known that a server will be used in a heavily loaded environment, it is more important to compare the performance-to-power ratios of the server at higher utilizations and not focus as much on the overall performance-per-watt value. SPEC Power futures The SPECpower_ssj2008 is a relatively new, but increasingly important benchmark, and it continues to evolve. Version 1.10 of the benchmark, announced in April 2009, has added support for server blade configurations. SPEC has also published SPECweb2009, which is a power-oriented version of the SPECweb benchmark. Further developments in this area will be happening relatively quickly since power efficiency in the data center remains an important topic. To contact an HP spec representative, click here: [email protected]. Additional resources For additional information on the topics discussed in this article, visit the following websites: Source SPEC.org SPECpower_ssj2008 main page HP ProLiant Servers Benchmarks page Email / Hyperlink http://www.spec.org/power_ssj2008/ http://h18004.www1.hp.com/products/servers/benchmark s/index.html 3