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164 lines
4.5 KiB
Markdown
164 lines
4.5 KiB
Markdown
# Dhrystone
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"DHRYSTONE" Benchmark Program by Reinhold P. Weicker
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RT-Thread 上的 MCU/CPU 性能测试小工具，在 menuconfig 里选中软件包后，在 msh 中输入：
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```
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msh> dhrystone_test
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```
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就可以看到跑分结果了，例如：
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### STM32F103 (ARMCC -O3 -Otime) 跑分: 79 DMIPS & 1.09 DMIPS/MHz
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```
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\ | /
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- RT - Thread Operating System
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/ | \ 4.0.2 build Oct 15 2019
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2006 - 2019 Copyright by rt-thread team
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msh >
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msh >dhrystone_test
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Dhrystone Benchmark, Version 2.1 (Language: C)
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Program compiled without 'register' attribute
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Execution starts, 320000 runs through Dhrystone
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Execution ends
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Final values of the variables used in the benchmark:
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Int_Glob: 5
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should be: 5
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Bool_Glob: 1
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should be: 1
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Ch_1_Glob: A
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should be: A
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Ch_2_Glob: B
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should be: B
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Arr_1_Glob[8]: 7
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should be: 7
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Arr_2_Glob[8][7]: 320010
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should be: Number_Of_Runs + 10
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Ptr_Glob->
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Ptr_Comp: 536892000
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should be: (implementation-dependent)
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Discr: 0
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should be: 0
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Enum_Comp: 2
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should be: 2
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Int_Comp: 17
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should be: 17
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Str_Comp: DHRYSTONE PROGRAM, SOME STRING
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should be: DHRYSTONE PROGRAM, SOME STRING
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Next_Ptr_Glob->
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Ptr_Comp: 536892000
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should be: (implementation-dependent), same as above
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Discr: 0
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should be: 0
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Enum_Comp: 1
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should be: 1
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Int_Comp: 18
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should be: 18
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Str_Comp: DHRYSTONE PROGRAM, SOME STRING
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should be: DHRYSTONE PROGRAM, SOME STRING
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Int_1_Loc: 5
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should be: 5
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Int_2_Loc: 13
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should be: 13
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Int_3_Loc: 7
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should be: 7
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Enum_Loc: 1
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should be: 1
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Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRING
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should be: DHRYSTONE PROGRAM, 1'ST STRING
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Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRING
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should be: DHRYSTONE PROGRAM, 2'ND STRING
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Microseconds for one run through Dhrystone: 7
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Dhrystones per Second: 139130
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VAX MIPS rating: 79
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```
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### GD32VF103CB (GCC -Os): 50 DMIPS & 0.46 DMIPS/MHz
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```
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\ | /
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- RT - Thread Operating System
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/ | \ 4.0.2 build Oct 14 2019
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2006 - 2019 Copyright by rt-thread team
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msh >
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msh >dhrystone_test
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Dhrystone Benchmark, Version 2.1 (Language: C)
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Program compiled without 'register' attribute
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Execution starts, 320000 runs through Dhrystone
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Execution ends
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Final values of the variables used in the benchmark:
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Int_Glob: 5
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should be: 5
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Bool_Glob: 1
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should be: 1
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Ch_1_Glob: A
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should be: A
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Ch_2_Glob: B
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should be: B
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Arr_1_Glob[8]: 7
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should be: 7
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Arr_2_Glob[8][7]: 320010
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should be: Number_Of_Runs + 10
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Ptr_Glob->
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Ptr_Comp: 536884636
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should be: (implementation-dependent)
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Discr: 0
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should be: 0
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Enum_Comp: 2
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should be: 2
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Int_Comp: 17
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should be: 17
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Str_Comp: DHRYSTONE PROGRAM, SOME STRING
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should be: DHRYSTONE PROGRAM, SOME STRING
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Next_Ptr_Glob->
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Ptr_Comp: 536884636
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should be: (implementation-dependent), same as above
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Discr: 0
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should be: 0
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Enum_Comp: 1
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should be: 1
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Int_Comp: 18
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should be: 18
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Str_Comp: DHRYSTONE PROGRAM, SOME STRING
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should be: DHRYSTONE PROGRAM, SOME STRING
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Int_1_Loc: 5
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should be: 5
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Int_2_Loc: 13
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should be: 13
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Int_3_Loc: 7
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should be: 7
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Enum_Loc: 1
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should be: 1
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Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRING
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should be: DHRYSTONE PROGRAM, 1'ST STRING
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Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRING
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should be: DHRYSTONE PROGRAM, 2'ND STRING
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Microseconds for one run through Dhrystone: 11
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Dhrystones per Second: 89385
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VAX MIPS rating: 50
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```
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更多测试结果可以在这里看到：
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**https://blog.stratifylabs.co/device/2019-05-20-Dhrystone-Benchmarking-on-MCUs/**
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## 注意事项
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- 如果 MCU 性能太强劲一下就测试结束了，得不到有效结果，可以适当增加图中的迭代次数
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