• why there are 4 cores per cluster in ARMV8 architecture

    RadarSong
    RadarSong

    Hi experts,

    I want to knows why there are 4 core cores per cluster in ARM big.Littte architecture?

    Is it possiable if we make more cores per cluster? if not, what is the limitation?

    • Answered
    • over 4 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Which ARM processor is HSA compatible?

    Samy CHBINOU
    Samy CHBINOU

    Hi,

    I am new to the ARM community. I am currently studying the HSA (Heterogeneous System Architecture). ARM is member of this foundation.

    I wonder which processor from ARM is HSA enabled? And on which devkit (raspberry, ODROID, or other) So I can use it…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Questions about Generic Timer in ARMv8

    wangchj
    wangchj

    When two clusters(Big/Little) exist in SoC, the timer can be used to support Synchronization between two clusters.

    But How to understand "Synchronization", anybody can tell me some typical application context? I am really confused......

    And, if…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Does CCI-400 guarantees cache coherency between secure and non-secure worlds?

    Kay
    Kay

    Hi Experts,

    I'm developing some kind of Secure OS on A57/53 big.LITTLE SoC.

    While multi-core testing, I'm facing some wired problem on my world shared memory mechanism.

    When I run world shared memory test on a single core (using affinity), it works…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Can one ARM core debug another one in an MP/bigLITTE system?

    Axel Heider
    Axel Heider

    Hi,

    I'm wondering, if one core could debug another one on the same or another cluster in an MP/BigLitte system ?

    • start/stop execution
    • read/write core registers
    • modify watch/breakapoints
    • full CP15 access

    The use case would be a kernel debugger and the debug…

    • over 7 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • I want to know how to invalidate or clean to cache only used secure-world

    박주병
    박주병

    Hello experts.

    I making a security operating system using trustzone using ARMv8 big-little core.

    I face some probleam of cache clean or invalidate.

    I want to cache flush to used only secure-world memory based on virtual memory, no flush non-secure world…

    • Answered
    • over 5 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • shareable domain and cache policy problem

    zhi
    zhi

    Hi,

    I'm trying to find out what level is the out-most level of inner shareable domain. Is there any register to get this information? I want to know what inner shareable domain is in A53 big-LITTLE architecture. I find some articles that telling L1 and…

    • over 1 year ago
    • Processors
    • Cortex-A / A-Profile forum
  • Arm big.LITTLE, migration decision

    caff
    caff
    Hi everybody, I'm doing a presentation about ARM big.LITTLE Technology. What is the tracked load metric that is used to decide whether and when to allocate a thread to a big or LITTLE core?
    • Answered
    • over 3 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • What is the fabric topology within the dynamiq cluster?

    kangzhang
    kangzhang

    Is the fabric topology in the DynamIQ cluster a conventional cross bar or a ring/mesh?

    • over 2 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Energy Aware Scheduling (EAS) in Linux 5.0

    Quentin Perret
    Quentin Perret

    The Energy Aware Scheduler (EAS) is now available as part of Linux 5.0. It enables energy-efficient scheduling decisions on big.LITTLE and DynamIQ Arm platforms by choosing the right type of CPU for each task.

    What is EAS ?

    EAS is an extension of the…

    • over 1 year ago
    • Processors
    • Processors blog
  • How Arm, Microsoft and Qualcomm are revolutionizing the PC experience

    Mitesh Soni
    Mitesh Soni

    As discussed in my previous blog, we have now reached the second wave of Windows 10 ‘Always On, Always Connected’ PCs with Snapdragon SoCs based on Arm Cortex technology. A new Arm-commissioned Whitepaper from Shrout Research shows how Windows…

    • over 2 years ago
    • Processors
    • Processors blog
  • Extended System Coherency: Part 1 - Cache Coherency Fundamentals

    Neil Parris
    Neil Parris

    Chinese Version 中文版:扩展系统一致性 - 第 1 部分 - 缓存一致性基本信息

    Introduction

    The theme of TechCon 2013 was “Where intelligence connects” and in many ways hardware system coherency is an important part of connecting the intelligence of an SoC. This year I presented…

    • over 6 years ago
    • Processors
    • Processors blog
  • The Top 5 Things to Know about Cortex-A53

    Brian Jeff
    Brian Jeff

    The Arm Cortex-A53 was introduced to the market in October 2012, delivering the Armv8 instruction set and significantly increased performance in a highly efficient power and area footprint. It is available for licensing now, and will be deployed in silicon…

    • over 7 years ago
    • Processors
    • Processors blog
  • Different performance in HYP and SVC mode ARMv7A?

    ivanpavic
    ivanpavic

    I'm doing some testing on Exynos5422 SoC which implements big.LITTLE architecture (A7 + A15), I'm running bare metal application which starts in HYP mode. I haven't returned from HYP mode by accident and then software delay which I implemented by simple…

    • Answered
    • over 3 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Learn about multicore Arm software development at DAC

    Chris Shore
    Chris Shore

    Are you in the Austin for DAC 2017, June 18-22? Be sure to look up a tutorial I am presenting in collaboration with our training partner Doulos.

    In the session, Multicore Software Development on Arm, delivered with David Black, one of Doulos's senior instructors…

    • over 3 years ago
    • Processors
    • Processors blog
  • Arm Cortex-A75: ground-breaking performance for intelligent solutions

    Stefan Rosinger
    Stefan Rosinger

    Its seems like it was only yesterday when we announced the Arm Cortex-A73, the most power-efficient high-performance Cortex application processor to date. Today we can see Cortex-A73 in production, powering cutting-edge devices in the mobile and consumer…

    • over 3 years ago
    • Processors
    • Processors blog
  • Arm Cortex-A55: Efficient performance from edge to cloud

    Govind Wathan
    Govind Wathan

    Have you heard? There are a couple of new CPUs in town... and they pack a punch! Of course, I am talking about the Arm Cortex-A75 and Cortex-A55, the first Cortex-A processors based on the recently announced, DynamIQ technology. In this blog, we will…

    • over 3 years ago
    • Processors
    • Processors blog
  • What's next for voice in the car? A Q&A with ARM & Recognition Technologies

    Eoin McCann
    Eoin McCann

    Soshun Arai, Arm and Mark Sykes, Recognition Technologies discuss the next generation of embedded voice for the automotive cockpit.

    Recognition Technologies is a partner of Arm and their RecoMadeEasy® software provides embedded natural language speech…

    • over 3 years ago
    • Processors
    • Processors blog
  • Where does big.LITTLE fit in the world of DynamIQ?

    Govind Wathan
    Govind Wathan

    The recent announcement of Arm DynamIQ technology has generated a lot of curiosity within both the tech industry and the tech-savvy consumers, regarding the impact on the future of big.LITTLE technology. The short answer is that big.LITTLE technology is…

    • over 3 years ago
    • Processors
    • Processors blog
  • Arm DynamIQ: Technology for the next era of compute

    Govind Wathan
    Govind Wathan

    We are in the age of connected intelligence, and it is completely transforming how we live. I see technology making decisions for us regularly and anticipating our next move. Most of the time my devices know what I want even before I know what I want…

    • over 3 years ago
    • Processors
    • Processors blog
  • Arm DynamIQ: Expanding the possibilities for artificial intelligence

    Nandan Nayampally
    Nandan Nayampally

    In the past four years alone, we have witnessed an amazing expansion of compute. Go inside the numbers of the recent 100 billion Arm-based chips milestone and you will see that 50 billion were shipped by our partners from 2013 to 2017, which demonstrates…

    • over 3 years ago
    • Processors
    • Processors blog
  • I would like to settle an argument with regards to Rockchip RK3288 Cortex-A17 specifications

    Phil Seaman
    Phil Seaman

    There seems to be great confusion in some communities with regards to how products are marketed and I am seeking some clarification.

    Earlier on this year, at an exhibition, Rockchip were showing off their new RK3288 CPU and has an advertising board that…

    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • Technical questions about the Juno Development Board

    Pedro Tomás
    Pedro Tomás

    I am interested in buying a Juno development board, but have a set of technical questions related to the platform, namely:

       (1) What are the migration modes that are available on the ARMv8 big.LITTLE? In particular, can I use both Cluster and Global…

    • Answered
    • over 6 years ago
    • Processors
    • Cortex-A / A-Profile forum
  • ARM IP and Intel Custom Foundry collaboration: A new era for premium mobile design

    Will Abbey
    Will Abbey

    Today we have exciting news: ARM and Intel Custom Foundry have announced an agreement to accelerate the development and implementation of ARM SoCs on Intel’s 10nm process. Specifically, we are making ARM’s Artisan® Physical IP available…

    • over 4 years ago
    • Processors
    • Processors blog
  • Application Note: High-level Considerations for Power Management of a big.LITTLE System

    Roy Hu
    Roy Hu

    Power management is important, and has become increasingly complex. Recently, we have created an application note. See details below. Hopefully, you will find it useful.

    Purpose

    • Provides high-level considerations for power management of a big.LITTLE system…
    • DAI0424A.pdf
    • over 4 years ago
    • Processors
    • Processors blog
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