99 lines
3.0 KiB
Markdown
99 lines
3.0 KiB
Markdown
# Dhrystone Benchmark
|
|
|
|
:copyright: Original sources from [https://github.com/sifive/benchmark-dhrystone](https://github.com/sifive/benchmark-dhrystone) (also, see `LICENSE`).
|
|
The source code has been modified for the NEORV32 processor.
|
|
|
|
To compile the NEORV32 executable:
|
|
```
|
|
neorv32/sw/example/dhrystone$ sh dhrystone.sh
|
|
```
|
|
|
|
The default number of iterations is 2000000. You can modify this by changing `USER_FLAGS+=-DDHRY_ITERS=2000000` in `dhrystone.sh`.
|
|
The default optimization level (EFFORT) is `O3`.
|
|
|
|
:warning: Dhrystone will require an IMEM size of 16kB and a DMEM size of 16kB. The MTIME machine timer is used for timing evaluation.
|
|
|
|
:construction: Porting Dhrystone is still work-in-progress. Performance results might be incorrect and not optimized.
|
|
All results only show the integer parts.
|
|
|
|
### Exemplary Output
|
|
|
|
Output generated for processor HW version [v1.5.9.1](https://github.com/stnolting/neorv32/blob/master/CHANGELOG.md)
|
|
using performance-optimized configuration options.
|
|
|
|
```
|
|
NEORV32: Processor running at 100000000 Hz
|
|
NEORV32: Executing Dhrystone (2000000 iterations). This may take some time...
|
|
|
|
|
|
Dhrystone Benchmark, Version 2.1 (Language: C)
|
|
|
|
Program compiled without 'register' attribute
|
|
|
|
Execution starts, 2000000 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]: 2000010
|
|
should be: Number_Of_Runs + 10
|
|
Ptr_Glob->
|
|
Ptr_Comp: -2147467428
|
|
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: -2147467428
|
|
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: 13
|
|
Dhrystones per Second: 76923
|
|
|
|
NEORV32: << DETAILED RESULTS (integer parts only) >>
|
|
NEORV32: Total cycles: 2662000187
|
|
NEORV32: Cycles per second: 100000000
|
|
NEORV32: Total runs: 2000000
|
|
|
|
NEORV32: DMIPS/s: 76923
|
|
NEORV32: DMIPS/MHz: 769
|
|
|
|
NEORV32: VAX DMIPS/s: 43
|
|
NEORV32: VAX DMIPS/MHz: 43/100
|
|
```
|