Dhrystone Benchmark

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
  • Sample output for Dhrystone benchmark example

Introduction

Dhrystone is a synthetic benchmark that measures and compares processor performance.

The Dhrystone benchmark program contains 52 assignments, 33 control statements and 17 procedures/ function calls. Unlike Whetstone benchmarking, the program doesn't contain floating point operation and concentrates on string handling and standard code, heavily influenced by hardware and software design, compiler and linker options, code optimizing, cache memory, wait states and integer data types. 103 statements are dynamically executed.

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 nortos
Toolchain	ti-arm-clang
Boards	am275x-evm
Example folder	examples/benchmarks/dhrystone_benchmark

Steps to Run the Example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run

Sample output for Dhrystone benchmark example

 BENCHMARK START - DHRYSTONE
 
Dhrystone Benchmark, Version 2.1 (Language: C)
 
- BEGIN cycle count:                         7
- END Cycle count:                           153441801
- USER cycle count:                          153441794
 
BENCHMARK Using clock 1000000000
- Usertime in sec:                           0.153442
- Microseconds for one run through Dhrystone:   0.3
- Dhrystones per Second:                     3258564.8
 
Normalized MIPS/MHz:                         1.8546
BENCHMARK END
 
 All tests have passed.