Chapter 9

Optimizing DSP Software – Benchmarking and Profiling DSP Systems

Michelle Fleischer

Chapter Outline

Introduction

Writing a test harness

Test harness inputs, outputs, and correctness checking

Isolating a DSP kernel

Protecting against aggressive build tools

Allowing flexibility for code placement

Modeling of true system behaviors

Cache effects

Memory latency effects

System effects

RTOS overhead

Execution in a multicore/multidevice environment

Methods for measuring performance

Time-based measurement

Hardware timers

Performance counter-based measurement

Profiler-based measurement

Measuring the measurement

Excluding non-related events

Interrupts

Runtime library functions used in the benchmark

Simulated measurement

Hardware measurement

Profiling ...

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