Example: simd_performance_benchmark

Figure 17.3 — Example: SIMD Performance Benchmark

Crate: cfd-suite (workspace root)
Run: cargo run --example simd_performance_benchmark
Source: examples/simd_performance_benchmark.rs

What This Example Demonstrates

Runtime SIMD capability detection and throughput benchmark for CFD gradient and flux kernels using cfd-math::simd::CfdSimdOps backed by hermes.

Key Code Snippet

use cfd_math::simd::cfd::CfdSimdOps;
use std::time::Instant;

let ops = CfdSimdOps::<f64>::new();
// ops dispatches to AVX2, NEON, or scalar depending on the host CPU

let t0 = Instant::now();
// ... gradient kernel call ...
println!("{}×{}: {:.3} ms", nx, ny, t0.elapsed().as_secs_f64() * 1e3);

Atlas Integration

CfdSimdOps wraps the hermes-simd SIMD abstraction layer with runtime dispatch so CFDrs code achieves SIMD acceleration without unsafe and without committing to a specific ISA at compile time.

Expected fallback on hardware without AVX2/NEON: scalar path, 1× throughput.

Book Chapter

← SIMD, GPU, and Backend Migration