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Standard Performance Evaluation Corporation

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SERT® Suite 2

The SERT® standard is providing a first order of approximation of server efficiency across a broad range of application environments. It is designed to be economical and easier to use by utilizing a comprehensive graphical user interface (GUI) and predetermined sets of tuning parameters. The SERT suite has been implemented and tested for a variety of 64-bit processors, operating systems, and JVMs. It is scalable and tested up to a maximum of 8 processor sockets and a maximum of 64 nodes. The server under test (SUT) may be a single stand-alone server or a multi-node set of servers. A multi-node SUT will consist of server nodes that cannot run independently of shared infrastructure such as a backplane, power-supplies, fans, or other elements. These shared infrastructure systems are commonly known as blade servers or multi-node servers.

The main body of code is in written in Java in order to lower the burden of cross-platform support. The framework is designed to accommodate other program languages as well. A series of different workload characteristics are implemented to demonstrate the effectiveness of different server sizes and configurations. The workload also utilized SPEC’s concept of multiple load levels and details can be found in the design document. Regulatory programs are designed to foster continuous improvement, with thresholds for success rising as the industry progresses. The SERT suite is designed to match this paradigm by implementing a quick adoption process of new computing technologies.

The right balance between high repeatability of the results, high sub-system coverage, and low resource allocation is desirable and resulted in a run time of around 2 ˝ hours. The results output, including the SERT suite metric, are generated in both machine- and human-readable forms, enabling automatic submission to government-sponsored certification programs as well as both summary and detail reports for use by potential customers.


November 2, 2020: ISO/IEC 21836:2020 adopts SPEC's SERT suite for measuring server efficiency.
"ISO/IEC 21836:2020 Information technology — Data centres — Server energy effectiveness metric" has been published and the SERT suite has been chosen to measure server efficiency. Please see "ISO 21836:2020 SERT Suite Requirements" for guidance on using SERT with this ISO standard.

January 29, 2020: U.S. EPA adopts SPEC's SERT suite 2.0.3
The United States Department of Energy's (DOE) Environmental Protection Agency (EPA) issued a memo titled "Server Efficiency Rating Tool (SERT) V2.0.3 Update to ENERGY STAR Version 3.0 Program Requirements" clarifying that certifying to the ENERGY STAR Version 3.0 Computer Servers Program shall require using the newly updated SERT Version 2.0.3 from this point forward.

December 6, 2019: SPEC's SERT suite 2.0.3 Released
This version includes multiple enhancements including support for Marvell ThunderX2 processors, support for HP-UX on Itanium, and a fix for IBM Power Large Memory configurations on Linux

March 29th, 2019: Japan METI Top Runner Program announces regulation utilizing the SERT suite
In a memo published March 29th, 2019, Japan's Ministry of Economy, Trade, and Industry (METI) indicated they had accepted a shift in computer server energy conservation standard that takes into account the whole server rather than simply the CPU. The SERT suite version 2 is the metric chosen by METI to demonstrate performance per watt for computer servers in this geography.

March 15, 2019: The European Union adopts regulation utilizing the SERT suite's acive and idle state efficiency metrics
The Official Journal of the European Union indicated that member states elected to adopt server and data storage product Lot9 Ecodesign Regulation (EU) 2019/424. This regulation went into effect March 1st, 2020, with the SERT suite being the metric of choice for active and idle state server efficiency calculations on products within the scope of this regulation.


Technical documentation for the SERT suite
Technical and support documents, run and reporting rules, etc.

JVM Options Guide for 2.0
User Guide 
Simplified Chinese User Guide 
Run and Reporting Rules
Result File Field Descriptions 
Efficiency Score Metric 

Technical Design Documents:   
          Design Document
          PTDaemon® Tool Design

Power and Performance Methodology
Accepted Measurement Devices
Platform Enablement and Acceptance Process
Simplified Chinese Platform Enablement and Acceptance Process


Technical support requiring involvement of specialists is done by volunteers from our member institutions (see member list). Please do not send us any proprietary information in your queries.

Frequently Asked Questions(FAQ) - Installation and runtime issues raised by users of the SERT tool.
Support Forums for the SERT suite, the Chauffeur™ WDK and the SPEC PTDaemon® tool
Support Request Form
Power Measurement Setup Guide

Component Update Process (Draft)

In the quickly evolving world of computer servers, software updates are needed to enable support for new hardware and software platforms, to address software bugs, or to enhance usability.

However, to accurately compare the SERT suite results, consistency in elements which affect the measurement, is required. Additionally, when the SERT suite is implemented, it is imperative that changes which affect result comparability are not introduced for the duration of a government regulatory program.

To accommodate these requirements, the following test plans (draft) have been developed to maintain comparability of measurement results while allowing updates.

The SERT Suite Component Update Process (draft)


December 6th, 2019: the SERT suite 2.0.3 released

For details on the update process, visit the the SERT suite update page