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DAI0273A_dhrystone_benchmarking.pdf
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Dhrystone Benchmarking for ARM Cortex Processors ARM处理器在Dhrystone软件下的基准测试, 测试其他嵌入式CPU可以按照该标准测试计算
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Copyright © 2011 ARM Limited. All rights reserved.
ARM DAI 0273A (ID072111)
Dhrystone Benchmarking for ARM
Cortex Processors
Application Note 273
Released on: 20 July 2011
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Dhrystone Benchmarking for ARM Cortex Processors
ARM DAI 0273A Copyright © 2011 ARM Limited. All rights reserved. 2
ID072111 Non-Confidential
Dhrystone Benchmarking for ARM Cortex Processors
Application Note 273
Copyright © 2011 ARM Limited. All rights reserved.
Release Information
Proprietary Notice
Words and logos marked with
®
or
™
are registered trademarks or trademarks of ARM
®
Limited in the EU and other
countries, except as otherwise stated below in this proprietary notice. Other brands and names mentioned herein may
be the trademarks of their respective owners.
Neither the whole nor any part of the information contained in, or the product described in, this document may be
adapted or reproduced in any material form except with the prior written permission of the copyright holder.
The product described in this document is subject to continuous developments and improvements. All particulars of the
product and its use contained in this document are given by ARM in good faith. However, all warranties implied or
expressed, including but not limited to implied warranties of merchantability, or fitness for purpose, are excluded.
This document is intended only to assist the reader in the use of the product. ARM Limited shall not be liable for any
loss or damage arising from the use of any information in this document, or any error or omission in such information,
or any incorrect use of the product.
Where the term ARM is used it means “ARM or any of its subsidiaries as appropriate”.
Confidentiality Status
This document is Non-Confidential. The right to use, copy and disclose this document may be subject to license
restrictions in accordance with the terms of the agreement entered into by ARM and the party that ARM delivered this
document to.
Unrestricted Access is an ARM internal classification.
Product Status
The information in this document is final, that is for a developed product.
Web Address
http://www.arm.com
Table 1 Change history
Date Issue Confidentiality Change
July 2011 A Non-Confidential First release
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Dhrystone Benchmarking for ARM Cortex Processors
ARM DAI 0273A Copyright © 2011 ARM Limited. All rights reserved. 3
ID072111 Non-Confidential
1 Introduction
The first version of the Dhrystone benchmark program was written in 1984 by Reinhold
Weicker to measure the integer performance of processors and compilers. It became popular
because it was very simple, could be quickly compiled and run and computed a single result that
was more representative than the MIPS numbers reported by processor vendors. In 1988,
version 2 of Dhrystone was released in the Ada, C and Pascal languages.
Today, Dhrystone is no longer seen as a representative benchmark and ARM does not
recommend using it. In general, it has been replaced by more complex processor benchmarks
such as SPEC and CoreMark.
ARM quotes figures for the C version of Dhrystone 2.1.
Dhrystone performance is calculated using the formula:
Dhrystones per second = number of runs / execution time.
For the result to be valid, the Dhrystone code must be executed for at least two seconds, although
longer is generally better, and ARM recommends at least 20 seconds.
This application note describes how to build and run Dhrystone on both bare-metal and
OS-hosted systems. If you have any problems or questions about benchmarking ARM Cortex
processors, contact ARM support,
http://www.arm.com/support
.
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