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Accelerated inference on Arm microcontrollers with TensorFlow Lite for Microcontrollers and CMSIS-NN

↗ Quelle (blog.tensorflow.org)
🗣️ Stimme:

A guest post by Fredrik Knutsson of Arm


The MCU universe

Microcontrollers (MCUs) are the tiny computers that power our technological environment. There are over 30 billion of them manufactured every year, embedded in everything from household appliances to fitness trackers. If you’re in a house right now, there are dozens of microcontrollers all around you. If you drive a car, there are dozens riding with you on every drive. Using

With minimal computational resources, it is important that microcontroller programs are optimized to run as efficiently as possible. This means making the most of the features of their microprocessor hardware, which requires carefully tuned application code.

Many of the microcontrollers used in popular products are built around Arm’s Cortex-M based processors, which are the industry leader in 32-bit microcontrollers, with more than 47 billion shipped. Arm’s open source ) instructions for hardware acceleration of operations such as matrix multiplication.

Benchmarks for key use cases

Arm’s engineers have worked closely with the TensorFlow team to develop optimized versions of the TensorFlow Lite kernels that use CMSIS-NN to deliver blazing fast performance on Arm Cortex-M cores. Developers using TensorFlow Lite can use these optimized kernels with no additional work, just by using the latest version of the library. Arm has made these optimizations in open source, and they are free and easy for developers to use today!

The following benchmarks show the performance uplift when using CMSIS-NN optimized kernels versus reference kernels for several key use cases featured in the TFLM example applications. The tests have been performed on an Arm Cortex-M4 based FPGA platform:

processor supports MVE, also known as Helium technology.

Improving performance with CMSIS-NN

So far, the following optimized CMSIS-NN kernels have been integrated with TFLM:

or . For example, to build the person detection example for the SparkFun Edge with CMSIS-NN kernels, you can use the following command:

make -f tensorflow/lite/micro/tools/make/Makefile TARGET=sparkfun_edge OPTIMIZED_KERNEL_DIR=cmsis_nn person_detection_int8_bin

The latest version of the .

Next leap in neural processing

Looking ahead into 2021 we can expect a dramatic increase in neural processing from the introduction of devices including a microNPU (Neural Processing Unit) working alongside a microcontroller. These microNPUs are designed to accelerate ML inference within the constraints of embedded and IoT devices, with devices using the Arm Cortex-M55 MCU coupled with the new Ethos-U55 microNPU delivering up to a 480x performance increase compared to previous microcontrollers.

This unprecedented level of ML processing capability within smaller, power constrained devices will unlock a huge amount of innovation across a range of applications, from smart homes and cities to industrial, retail, and healthcare. The potential for innovation within each of these different areas is huge, with hundreds of sub segments and thousands of potential applications that will make a real difference to people’s lives.

Vollständiger Original-Bericht
Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf blog.tensorflow.org.
↗ Original-Artikel auf blog.tensorflow.org lesen
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