ThePassionate opened a new pull request, #3343:
URL: https://github.com/apache/nuttx-apps/pull/3343
## Benchmarks: Add Whetstone FPU Benchmark with Enhanced Timing
### Summary
This PR adds the Whetstone floating-point benchmark to NuttX applications.
The Whetstone benchmark is a widely-used tool for evaluating FPU
(floating-point unit) performance. The implementation includes timing
enhancements that provide millisecond-level precision for more accurate
performance measurement.
### Changes
#### Files Added
1. **benchmarks/whetstone/CMakeLists.txt**
- CMake build configuration for Whetstone benchmark
2. **benchmarks/whetstone/Kconfig**
- Kconfig menu options for benchmark configuration
3. **benchmarks/whetstone/Make.defs**
- Make definitions for the benchmark module
4. **benchmarks/whetstone/Makefile**
- Makefile for standalone compilation
5. **benchmarks/whetstone/whetstone.c**
- Whetstone benchmark implementation ported and adapted for NuttX
### Technical Details
**Whetstone Benchmark:**
- Ported from the official netlib benchmark:
https://www.netlib.org/benchmark/whetstone.c
- Adapted to NuttX coding style and build system conventions
- Comprehensive FPU performance evaluation tool
**Timing Precision Enhancement:**
- Original implementation used seconds-level timing (time(0))
- Enhanced to use millisecond-level precision for better accuracy
- Enables more precise measurement of short test cycles
- Critical for accurate FPU performance evaluation on faster processors
**Benefits:**
- Millisecond precision allows measurement of test cycles completing in less
than 1 second
- Better accuracy on modern high-performance systems
- Maintains compatibility with standard Whetstone benchmark methodology
### Impact
- **Performance Evaluation**: Provides standard FPU benchmark for NuttX
systems
- **Measurement Accuracy**: Millisecond-level timing improves result
precision
- **Portability**: Maintains standard Whetstone benchmark characteristics
- **Integration**: Seamlessly integrated into NuttX build system
### Usage
Enable benchmark with:
CONFIG_BENCHMARKS_WHETSTONE=y
### Testing
Benchmark functionality verified on various systems with FPU support.
`nsh> whetstone 100000
Loops: 100000, Iterations: 1, Duration: 5 sec.`
`C Converted Double Precision Whetstones: 2.00 MWIPS`
---
**Author**: makejian <[email protected]>
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