AN 829: PCI Express* Avalon® -MM DMA Reference Design

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ID 683554
Date 6/11/2018
Public
Document Table of Contents
Document Table of Contents x
1. AN 829: PCI Express* Avalon® -MM DMA Reference Design
1. AN 829: PCI Express* Avalon® -MM DMA Reference Design x
1.1. Introduction 1.2. Working with the Reference Design 1.3. Understanding PCI Express Throughput 1.4. Document Revision History for AN 829: PCI Express* Avalon® -MM DMA Reference Design
1.1. Introduction x
1.1.1. DMA Reference Design Hardware and Software Requirements 1.1.2. Avalon® -MM DMA Bridge Module Descriptions
1.2. Working with the Reference Design x
1.2.1. Project Hierarchy 1.2.2. Parameter Settings for PCI Express Hard IP Variations 1.2.3. PCIe* Avalon® -MM DMA Reference Design Platform Designer Systems 1.2.4. DMA Procedure Steps 1.2.5. Setting Up the Hardware 1.2.6. Programming the Intel® Cyclone® 10 GX FPGA Oscillator 1.2.7. Installing the DMA Test Driver and Running the Linux DMA Software
1.3. Understanding PCI Express Throughput x
1.3.1. Throughput for Posted Writes 1.3.2. Throughput for Reads 1.3.3. Throughput Differences for On-Chip and External Memory
1.3.1. Throughput for Posted Writes x
1.3.1.1. Specifying the Maximum Payload Size
1.3.2. Throughput for Reads x
1.3.2.1. Understanding Throughput Measurement
1. AN 829: PCI Express* Avalon® -MM DMA Reference Design

1.3.2.1. Understanding Throughput Measurement

To measure throughput, the software driver takes two timestamps. Software takes the first timestamp shortly after the you type the ./run command. Software takes the second timestamp after the DMA completes and returns the required completion status, EPLAST. If read DMA, write DMA and simultaneous read and write DMAs are all enabled, the driver takes six timestamps to make the three measurements.

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