某款28nm cortex-A7 Dhrystone DMIPS测试
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2022-03-11 16:17:31
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下载,编译,排错,再编译,再排错,编译PASS,一顿操作之后,dhrystone成功被移植到某款Cortex-A7平台,主频跑1.2G HZ的情况下,结果如下:
msh />dhrystone
Dhrystone Benchmark, Version 2.1 (Language: C)
Program compiled without 'register' attribute
Please give the number of runs through the benchmark:
Execution starts, 100000000 runs through Dhrystone
Execution ends
Final values of the variables used in the benchmark:
Int_Glob: 5
should be: 5
Bool_Glob: 1
should be: 1
Ch_1_Glob: A
should be: A
Ch_2_Glob: B
should be: B
Arr_1_Glob[8]: 7
should be: 7
Arr_2_Glob[8][7]: 100000010
should be: Number_Of_Runs + 10
Ptr_Glob->
Ptr_Comp: -1029845352
should be: (implementation-dependent)
Discr: 0
should be: 0
Enum_Comp: 2
should be: 2
Int_Comp: 17
should be: 17
Str_Comp: DHRYSTONE PROGRAM, SOME STRING
should be: DHRYSTONE PROGRAM, SOME STRING
Next_Ptr_Glob->
Ptr_Comp: -1029845352
should be: (implementation-dependent), same as above
Discr: 0
should be: 0
Enum_Comp: 1
should be: 1
Int_Comp: 18
should be: 18
Str_Comp: DHRYSTONE PROGRAM, SOME STRING
should be: DHRYSTONE PROGRAM, SOME STRING
Int_1_Loc: 5
should be: 5
Int_2_Loc: 13
should be: 13
Int_3_Loc: 7
should be: 7
Enum_Loc: 1
should be: 1
Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRING
should be: DHRYSTONE PROGRAM, 1'ST STRING
Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRING
should be: DHRYSTONE PROGRAM, 2'ND STRING
Microseconds for one run through Dhrystone: 0.4
Dhrystones per Second: 2777777.8
拢共才0.4个DMIPS,有点惨,怎么看这个数据都有问题,我还是不相信是CPU的锅,而是某个性能瓶颈充当了木桶上最短的那块木板,比如访存速率等等。
结束!
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