runWavePerfLoadsOnly()

WavePerfResult fl::wave_perf::runWavePerfLoadsOnly ( u32 W, u32 H, u32 iterations, LaplacianStencil stencil )

inline

Definition at line 110 of file wave_perf_bench.h.

                                                                                  {
    WavePerfResult r;
    if (!isValidGrid(W, H) || !isValidIterations(iterations)) {
        return r;
    }
    auto sim = makeBenchSim(W, H, stencil);
    volatile fl::i32 sink = 0;
    const u32 t0 = fl::micros();
    for (u32 i = 0; i < iterations; ++i) {
        fl::i32 acc = 0;
        for (u32 y = 0; y < H; ++y) {
            for (u32 x = 0; x < W; ++x) {
                acc += sim->geti16(static_cast<fl::size>(x),
                                   static_cast<fl::size>(y));
            }
        }
        sink += acc;
    }
    const u32 t1 = fl::micros();
    (void)sink;
    r.success = true;
    r.total_us = t1 - t0;
    const double cells_per_update = static_cast<double>(W) * H;
    r.us_per_update = static_cast<double>(r.total_us)
                       / static_cast<double>(iterations);
    r.us_per_cell_per_update = r.us_per_update / cells_per_update;
    r.fps_at_one_update_per_frame = (r.us_per_update > 0.0)
        ? (1.0e6 / r.us_per_update) : 0.0;
    return r;
}

References fl::FL_NO_EXCEPT, fl::wave_perf::WavePerfResult::fps_at_one_update_per_frame, H, isValidGrid(), isValidIterations(), makeBenchSim(), fl::micros(), fl::wave_perf::WavePerfResult::success, fl::wave_perf::WavePerfResult::total_us, fl::wave_perf::WavePerfResult::us_per_cell_per_update, fl::wave_perf::WavePerfResult::us_per_update, W, fl::x, and fl::y.

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