Cambridge, United Kingdom
GPU Memory System Design ArchitectApply now
Piece Together The World’s Most Powerful Puzzle
This world has a design. It’s infinite yet discoverable. Small yet powerful. Our design engineers must all at once predict it and create it. From implementation of the most advanced CPU, GPU and HPC processors on the planet to dreaming up every eventuality that could put our SoC and system IP to the test, we puzzle over the biggest questions of our time. And microarchitect the future.
There are not many people in the world that can claim to be an expert on designing memory systems. If you possess such rare skills, then we hope you will consider joining us in the GPU Hardware team as our new GPU Memory System Design Architect!
Below follows some typical problems our team is working on solving every day. We hope you find them intriguing!
Problem 1) Make a scalable memory system
We make GPUs for small screens such as watches, and for large screens found in laptops, car dashboards, TVs and flagship cell phones. The GPUs driving the smallest screens might have only one core, whereas the large screens require large multi-core GPUs with a beefy memory system.
- Suggest a way to build a memory system that can feed both small GPUs and large beasts with data.
Problem 2) Cache coherency
In our GPUs there are typically several shader cores, each with a L1 cache. These shader cores are connected to a shared L2 cache within the GPU. The GPU and the CPU cluster in the system is finally often also talking to a system level cache.
- Are you familiar with adding support for cache coherency protocols in memory systems?
Problem 3) Address translation
Address translation is typically needed for every read and write transaction within the shader cores. Low latency as well as throughput that scales linearly with the number of cores is important. This is hard to achieve by directly wiring up the cores to a central Memory Management Unit.
- Suggest a better way to implement address translation.
In this role you will be responsible for Architecting the memory system found in the Mali and Immortalis GPUs.
The compute workload changes over time and there is an every increasing demand for more compute power. These are a couple of the mechanisms driving new features and improvements into our GPUs.
Architects have an overall responsibility of the architecture of the memory system. High level feature and PPA improvement requirements will be provided. The mission is then to explore the design space and discuss ideas with the rest of the team. As a part of this work you will document ideas and provide estimates of throughput, performance, energy consumption area and bandwidth for the proposed changes.
You will work closely with memory system designers and verification engineers and together we will deliver new memory systems to our GPUs that both meets our high quality standards as well as PPA targets.
Architects also work with the wider GPU team including project leads, architects for other parts of the GPU, the implementation team, our GPU modelling team and the software and firmware team to name a few.
Required Skills and Experience :
- Must have designed memory system components such as Caches and MMUs before, preferably for use in multicore CPU or GPU systems.
- Should be able to have a meaningful discussion about the example problems listed in this advertisement.
- Must have written a whole lot of HDL (Verilog, SystemVerilog, VHDL) code at some point in your career.
“Nice To Have” Skills and Experience :
- Written papers, book chapters or books about caches. Presented at international conferences.
- Strong coding skills.
All arm employees are provided with vital training to succeed in their respective roles. As well as a friendly and high-performance working environment, Arm offers a competitive benefits package including RSU, private medical insurance, 30 days of annual leave, supplementary pension, and wellness benefits.
Accommodations at Arm
At Arm, we want our people to Do Great Things. If you need support or an accommodation to Be Your Brilliant Self during the recruitment process, please email firstname.lastname@example.org. To note, by sending us the requested information, you consent to its use by Arm to arrange for appropriate accommodations. All accommodation requests will be treated with confidentiality, and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list, examples of support include breaks between interviews, having documents read aloud or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process.
Hybrid Working at Arm
Arm’s hybrid approach to working is centred around flexibility, where we split our time between the office and other locations to get our work done. We empower groups/teams to determine their hybrid working pattern, with an expected minimum attendance in the office of 20% per month, depending on the work, level of experience and team’s needs. In some cases, the flexibility we can offer is limited by local legal, regulatory, tax, or other considerations, and where this is the case, we will collaborate with you to find the best solution.
Equal Opportunities at Arm
Arm is an equal opportunity employer, committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals, and don’t discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.
Work At The Very Edge
At Arm, you’re in a position to influence 95% of the world’s connected devices and all of their applications. Healthcare, infrastructure, virtual reality… you’ll affect hundreds, if not thousands of industries worldwide, racing towards new milestones in human endeavour.
Learning And Development
Whether you want to learn a new programming language, explore your management potential or witness the latest innovations at industry conferences, we promise you both the freedom and the support to develop when you want it.
We'll always encourage you to take plenty of annual leave, so you stay fresh and inspired. But you know what really does it? When we encourage you to take an extended, paid four-week sabbatical after 4 years of service.
You're a human being, not a resource. So it's important to us that we're there for you at significant points in your life. Whether you're having kids, acting as a primary care giver or have lost a loved one, our flexible progressive leave allows you to put your family first without worrying about your career.
We create a safe space for you to look after your mental and physical health, with support ranging from medical insurance to the workplace mental health platform, Unmind. Alongside a growing number of onsite gyms, yoga, cycling and running clubs. All of which comes with a flexible working policy, so you can live life and be your brilliant self.
Life At Arm
Life in the office doesn't get any better. Especially when those offices are as sleek as ours. And the people are as creative and intuitive. Combine that with our popular ‘we, not I' mindset and you enjoy the kind of teamwork and togetherness rarely found elsewhere. We share so much in common, not least the same passion for progress, but we also welcome each other's diversity. Because, ultimately, we love to inspire and be inspired every day.