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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Hello HN! I'm Tom, co-founder at Tensil (https://www.tensil.ai/). We design free and open source machine learning accelerators that anyone can use.
A machine learning inference accelerator is a specialized chip that can run the operations used in ML models very quickly and efficiently. It can be either an ASIC or an FPGA, with ASIC giving better performance but FPGA being more flexible.
Custom accelerators offer dramatically better performance per watt than existing GPU and CPU options. Massive companies like Google and Facebook use them to make training and inference cheaper. However, everyone else has been left out: small and mid-sized companies, students and academics, hobbyists and tinkerers currently have no chance of getting ML hardware that perfectly suits their needs. We aim to change that, starting with ML inference on embedded and edge FPGA platforms. Our dream is that our accelerators help people make new applications possible that simply weren't feasible before.
We believe that advances in AI go hand in hand with advances in computing hardware. As a couple of software and ML engineers hoping to live in a world alongside intelligent machines, we wanted to know why those hardware advances were taking so long! We taught ourselves digital design and gradually realized that the next generation of hardware will need to be finely customized to enable state of the art ML models at the edge, that is, running on your devices and not in the cloud. In the CPU world, the RISC-V RocketChip implementation has proven the value of customizable compute hardware. The problem was that no-one was building that kind of capability for ML acceleration. We started Tensil to build customizable ML accelerators and see what kind of applications people can create with them.
Tensil is a set of tools for running ML models on custom accelerator architectures. It includes an RTL generator, a model compiler, and a set of drivers. It enables you to create a custom accelerator, compile an ML model targeted at it, and then deploy and run that compiled model. To see how to do this and get it running on an FPGA platform, check out our tutorial at https://www.tensil.ai/docs/tutorials/resnet20-ultra96v2/.
We developed an accelerator generator in Chisel and then wrote a parameterizable graph compiler in Scala. (Fun fact: unlike in software, formal verification is actually a totally viable way to test digital circuits and we have made great use of this technique.) The accelerator generator takes in the desired architecture parameters and produces an instance of the accelerator which can be synthesized using standard EDA tools. The compiler implements ML models using the accelerator’s instruction set and can target any possible instance of the accelerator.
Currently, the accelerator architecture is based around a systolic array, similar to well-known ML ASICs. You can view the architecture spec in our documentation. The compiler performs a wide variety of tasks but is optimized for convolutional neural networks. There are also drivers for each supported platform, currently limited to FPGAs running bare-metal or with a host OS.
When you tell the driver to run your ML model, it sets up the input data and then streams the compiled model into the accelerator. The accelerator independently accesses host memory during execution. When the accelerator is done, the driver is notified and looks for the output in the pre-assigned area of host memory.
How are we different from other accelerator options? There are many ML ASICs out there but they are all locked into a single architecture, whereas we have customization at the core of our technology. This offers the potential for a better trade-off between performance/price/watts/accuracy. Compared with other FPGA options, Xilinx DPU is great but it’s closed source and can be difficult to work with if your model is in any way customized. By going open source, we aim to support the widest possible range of models. FINN is a very cool project but requires big changes to your model in order to work, and also typically requires large FPGAs which are unsuitable for edge deployments. We work out of the box with any model (no need to quantize), and on small edge FPGAs. For embedded systems, tflite/tfmicro are great for deploying very small ML models on extremely constrained edge devices, but they are limited in terms of the performance and accuracy that can be achieved. Our tools allow you to work with full size state of the art models at high accuracy and speed.
Currently we're focused on the edge and embedded ML inference use case. If you
A lot of SOTA models seem to be gravitating towards transformer based models. Obviously, I can't speak for the entire field, but you can just go take a look at the most popular HuggingFace repos and see what I mean. They started out focused on language, but because transformers have become so popular, they're expanding into the audio and vision domains quickly. Their library called 'transformers' is, outside of research, most peoples go to high level framework as it largely abstracts away a lot of the boilerplate that writing in pure TF, PyTorch, Jax requires.
See:
https://huggingface.co/spaces
https://github.com/huggingface/transformers