dhrystone测试前系统软件准备与计算
2024-04-29 09:23:28
关于介绍：
https://en.wikipedia.org/wiki/Dhrystone
软件准备：
- 查看系统interrupt，将系统驱动占用的中断号都关闭，关闭config或者修改dts，减少干扰；
/ # cat /proc/interruptsCPU0 CPU1 CPU2 CPU32: 0 0 0 0 GIC-0 29 Level arch_timer3: 2599 2402 2733 5185 GIC-0 30 Level arch_timer7: 3 0 0 0 GIC-0 192 Level ffe40000.bifrost8: 0 0 0 0 GIC-0 193 Level ffe40000.bifrost9: 0 0 0 0 GIC-0 194 Level ffe40000.bifrost13: 0 0 0 0 GIC-0 62 Level xhci-hcd:usb117: 275 0 0 0 GIC-0 247 Edge ffd1d000.i2c19: 359 0 0 0 GIC-0 71 Edge ffd1c000.i2c21: 343 0 0 0 GIC-0 113 Level ffd13000.spi22: 0 0 0 0 GIC-0 122 Level ffd15000.spi23: 29 0 0 0 GIC-0 227 Edge ff805000.i2c
IPI0: 900 2594 1421 2300 Rescheduling interrupts
IPI1: 44 323 299 321 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 Timer broadcast interrupts
IPI4: 0 0 0 0 IRQ work interrupts
IPI5: 0 0 0 0 CPU wake-up interrupts
Err: 0
- 设置系统主频最高和cpufreq governor为performance
/data # cat /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
performance
/sys/devices/system/cpu/cpufreq/policy0 # cat scaling_cur_freq
1908000
/sys/devices/system/cpu/cpufreq/policy0 # cat ../../cpu1/cpufreq/scaling_cur_fre
q
1908000
/sys/devices/system/cpu/cpufreq/policy0 # cat ../../cpu2/cpufreq/scaling_cur_fre
q
1908000
/sys/devices/system/cpu/cpufreq/policy0 # cat ../../cpu3/cpufreq/scaling_cur_fre
q
1908000
- 关闭irqbalace或者一些其他占用cpu资源的设置，cpu供电电压调整到最高；
Run dhrystone
原则是：几个cpu, 就跑几个单独的dhrystone
/data # ./dhrystone 1410065408 &
/data #
Dhrystone Benchmark, Version 2.1 (Language: C)Program compiled without 'register' attributeExecution starts, 1410065408 runs through Dhrystone
/data # ./dhrystone 1410065408 &
/data #
Dhrystone Benchmark, Version 2.1 (Language: C)Program compiled without 'register' attributeExecution starts, 1410065408 runs through Dhrystone
/data # ./dhrystone 1410065408 &
/data #
Dhrystone Benchmark, Version 2.1 (Language: C)Program compiled without 'register' attributeExecution starts, 1410065408 runs through Dhrystone
/data # ./dhrystone 1410065408 &
/data #
Dhrystone Benchmark, Version 2.1 (Language: C)Program compiled without 'register' attributeExecution starts, 1410065408 runs through Dhrystone
Execution endsFinal values of the variables used in the benchmark:Int_Glob: 5should be: 5
Bool_Glob: 1should be: 1
Ch_1_Glob: Ashould be: A
Ch_2_Glob: Bshould be: B
Arr_1_Glob[8]: 7should be: 7
Arr_2_Glob[8][7]: 1410065418should be: Number_Of_Runs + 10
Ptr_Glob->Ptr_Comp: 461642560should be: (implementation-dependent)Discr: 0should be: 0Enum_Comp: 2should be: 2Int_Comp: 17should be: 17Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Next_Ptr_Glob->Ptr_Comp: 461642560should be: (implementation-dependent), same as aboveDiscr: 0should be: 0Enum_Comp: 1should be: 1Int_Comp: 18should be: 18Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Int_1_Loc: 5should be: 5
Int_2_Loc: 13should be: 13
Int_3_Loc: 7should be: 7
Enum_Loc: 1should be: 1
Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRINGshould be: DHRYSTONE PROGRAM, 1'ST STRING
Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRINGshould be: DHRYSTONE PROGRAM, 2'ND STRINGMicroseconds for one run through Dhrystone: 0.1
Dhrystones per Second: 11321280.0Execution endsFinal values of the variables used in the benchmark:Int_Glob: 5should be: 5
Bool_Glob: 1should be: 1
Ch_1_Glob: Ashould be: A
Ch_2_Glob: Bshould be: B
Arr_1_Glob[8]: 7should be: 7
Arr_2_Glob[8][7]: 1410065418should be: Number_Of_Runs + 10
Ptr_Glob->Ptr_Comp: 106289984should be: (implementation-dependent)Discr: 0should be: 0Enum_Comp: 2should be: 2Int_Comp: 17should be: 17Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Next_Ptr_Glob->Ptr_Comp: 106289984should be: (implementation-dependent), same as aboveDiscr: 0should be: 0Enum_Comp: 1should be: 1Int_Comp: 18should be: 18Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Int_1_Loc: 5should be: 5
Int_2_Loc: 13should be: 13
Int_3_Loc: 7should be: 7
Enum_Loc: 1should be: 1
Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRINGshould be: DHRYSTONE PROGRAM, 1'ST STRING
Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRINGshould be: DHRYSTONE PROGRAM, 2'ND STRINGMicroseconds for one run through Dhrystone: 0.1
Dhrystones per Second: 11346788.0Execution endsFinal values of the variables used in the benchmark:Int_Glob: 5should be: 5
Bool_Glob: 1should be: 1
Ch_1_Glob: Ashould be: A
Ch_2_Glob: Bshould be: B
Arr_1_Glob[8]: 7should be: 7
Arr_2_Glob[8][7]: 1410065418should be: Number_Of_Runs + 10
Ptr_Glob->Ptr_Comp: 984427328should be: (implementation-dependent)Discr: 0should be: 0Enum_Comp: 2should be: 2Int_Comp: 17should be: 17Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Next_Ptr_Glob->Ptr_Comp: 984427328should be: (implementation-dependent), same as aboveDiscr: 0should be: 0Enum_Comp: 1should be: 1Int_Comp: 18should be: 18Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Int_1_Loc: 5should be: 5
Int_2_Loc: 13should be: 13
Int_3_Loc: 7should be: 7
Enum_Loc: 1should be: 1
Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRINGshould be: DHRYSTONE PROGRAM, 1'ST STRING
Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRINGshould be: DHRYSTONE PROGRAM, 2'ND STRINGMicroseconds for one run through Dhrystone: 0.1
Dhrystones per Second: 11345875.0Execution endsFinal values of the variables used in the benchmark:Int_Glob: 5should be: 5
Bool_Glob: 1should be: 1
Ch_1_Glob: Ashould be: A
Ch_2_Glob: Bshould be: B
Arr_1_Glob[8]: 7should be: 7
Arr_2_Glob[8][7]: 1410065418should be: Number_Of_Runs + 10
Ptr_Glob->Ptr_Comp: 918620992should be: (implementation-dependent)Discr: 0should be: 0Enum_Comp: 2should be: 2Int_Comp: 17should be: 17Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Next_Ptr_Glob->Ptr_Comp: 918620992should be: (implementation-dependent), same as aboveDiscr: 0should be: 0Enum_Comp: 1should be: 1Int_Comp: 18should be: 18Str_Comp: DHRYSTONE PROGRAM, SOME STRINGshould be: DHRYSTONE PROGRAM, SOME STRING
Int_1_Loc: 5should be: 5
Int_2_Loc: 13should be: 13
Int_3_Loc: 7should be: 7
Enum_Loc: 1should be: 1
Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRINGshould be: DHRYSTONE PROGRAM, 1'ST STRING
Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRINGshould be: DHRYSTONE PROGRAM, 2'ND STRINGMicroseconds for one run through Dhrystone: 0.1
Dhrystones per Second: 11346788.0[4]+ Done ./dhrystone 1410065408
[3]+ Done ./dhrystone 1410065408
[2]+ Done ./dhrystone 1410065408
[1]+ Done ./dhrystone 1410065408
/data #
如何计算
**DMIPS/MHz = Dhrystones per Second/1757/cpu主频**
cpu主频的单位是M
以当前的为例：
11321280/1757/1908=3.377
11346788/1757/1908=3.384
11345875/1757/1908=3.384
11346788/1757/1908=3.384(3.384*3+3.377)/4~3.38
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