Inlining + Reorganization + Roofline

2026-05-19 23:17:44 +02:00
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+# Optimizations of the Social Force Model
+
+## Table of Contents
+
+1. [Performance Results](#performance-results)
+2. [Baseline](#2-baseline)
+3. [Optimization 1](#3-optimization-1)
+4. [Optimization 2](#4-optimization-2)
+5. [Optimization 3](#5-optimization-3)
+6. [Optimization 4](#6-optimization-4)
+7. [Optimization 5](#7-optimization-5)
+8. [Optimization 6](#8-optimization-6)
+9. [Optimization 7](#9-optimization-7)
+10. [Optimization 8](#10-optimization-8)
+11. [Optimization 9](#11-optimization-9)
+
+---
+
+## Performance Results
+
+### x86
+
+**Machine**:
+
+```
+Processors: 16 × AMD Ryzen AI 7 350 w/ Radeon 860M
+Memory: 32 GiB of RAM (30.6 GiB usable)
+Graphics Processor: AMD Radeon 860M Graphics
+Manufacturer: LENOVO
+Product Name: 83HX
+System Version: IdeaPad Slim 5 14AKP10
+```
+
+**Frequency**: 2 GHz
+
+| #   | Optimization | W(n) [Flops]     | T(n) [Cycles]  | Performance [Flops/Cycle] | Author |
+| --- | ------------ | ---------------- | -------------- | ------------------------- | ------ |
+| 0   | Baseline     | 1'058'400'000.00 | 850'352'900.00 | 1.24                      |        |
+| 1   | Inlining     | 1'058'400'000.00 | 756'088'260.00 | 1.40                      | Elliot |
+| 2   |              |                  |                |                           |        |
+| 3   |              |                  |                |                           |        |
+| 4   |              |                  |                |                           |        |
+| 5   |              |                  |                |                           |        |
+| 6   |              |                  |                |                           |        |
+| 7   |              |                  |                |                           |        |
+| 8   |              |                  |                |                           |        |
+| 9   |              |                  |                |                           |        |
+
+### ARM
+
+**Machine**:
+
+```
+
+```
+
+**Frequency**: ...
+
+| #   | Optimization | W(n) [Flops] | T(n) [Cycles] | Performance [Flops/Cycle] | Author |
+| --- | ------------ | ------------ | ------------- | ------------------------- | ------ |
+| 0   | Baseline     |              |               |                           |        |
+| 1   |              |              |               |                           |        |
+| 2   |              |              |               |                           |        |
+| 3   |              |              |               |                           |        |
+| 4   |              |              |               |                           |        |
+| 5   |              |              |               |                           |        |
+| 6   |              |              |               |                           |        |
+| 7   |              |              |               |                           |        |
+| 8   |              |              |               |                           |        |
+| 9   |              |              |               |                           |        |
+
+## 2. Baseline
+
+**Author**: [Name]
+
+**Description**:
+Standard implementation without optimizations.
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 3. Optimization 1
+
+**Author**: [Quy Anh] «Elliot» Nguyen
+
+**Description**:
+Manually inlined functions, namely `w`, `acceleration_term_dt`, `pedestrian_repulsion_dt`, `obstacle_repulsion_dt`, `norm`, `dot`, and `find_nearest_obstacle_point`, all into `run_simulation`. Got rid of small number checks after verifying they do not affect results. Removed all references to `Vector2d` and rewrote `Pedestrian` into a struct of doubles. Reduced `sqrt()` calls using mathematical properties.
+
+**Relevant Files**: `variant_inlining_1.cpp`, `variant_inlining_2.cpp`, `variant_inlining_3.cpp`, `variant_inlining_4.cpp`, `variant_inlining_5.cpp`, `variant_inlining_6.cpp`, `variant_inlining_7.cpp`, `pedestrian_reduced.hpp`
+
+## 4. Optimization 2
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 5. Optimization 3
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 6. Optimization 4
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 7. Optimization 5
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 8. Optimization 6
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 9. Optimization 7
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 10. Optimization 8
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---
+
+## 11. Optimization 9
+
+**Author**: [Name]
+
+**Description**:
+[Briefly describe the optimization technique]
+
+```cpp
+// Paste your code here only the relevant part
+```
+
+---