Search Results for author:
Found 77 papers, 34 papers with code
Inducing and Exploiting Activation Sparsity for Fast Inference on Deep Neural Networks
In this paper, we present an in-depth analysis of methods for maximizing the sparsity of the activations in a trained neural network, and show that, when coupled with an efficient sparse-input convolution algorithm, we can leverage this sparsity for significant performance gains.
Mitigating the Impact of Outlier Channels for Language Model Quantization with Activation Regularization
We show that regularizing both the inputs and outputs is crucial for preventing a model's "migrating" the difficulty in input quantization to the weights, which makes post-training quantization (PTQ) of weights more difficult.
QuaRot: Outlier-Free 4-Bit Inference in Rotated LLMs
We introduce QuaRot, a new Quantization scheme based on Rotations, which is able to quantize LLMs end-to-end, including all weights, activations, and KV cache in 4 bits.
Extreme Compression of Large Language Models via Additive Quantization
The emergence of accurate open large language models (LLMs) has led to a race towards quantization techniques for such models enabling execution on end-user devices.
RoSA: Accurate Parameter-Efficient Fine-Tuning via Robust Adaptation
We investigate parameter-efficient fine-tuning (PEFT) methods that can provide good accuracy under limited computational and memory budgets in the context of large language models (LLMs).
How to Prune Your Language Model: Recovering Accuracy on the "Sparsity May Cry'' Benchmark
Pruning large language models (LLMs) from the BERT family has emerged as a standard compression benchmark, and several pruning methods have been proposed for this task.
ELSA: Partial Weight Freezing for Overhead-Free Sparse Network Deployment
We present ELSA, a practical solution for creating deep networks that can easily be deployed at different levels of sparsity.
AsGrad: A Sharp Unified Analysis of Asynchronous-SGD Algorithms
As a by-product of our analysis, we also demonstrate convergence guarantees for gradient-type algorithms such as SGD with random reshuffling and shuffle-once mini-batch SGD.
QMoE: Practical Sub-1-Bit Compression of Trillion-Parameter Models
Mixture-of-Experts (MoE) architectures offer a general solution to the high inference costs of large language models (LLMs) via sparse routing, bringing faster and more accurate models, at the cost of massive parameter counts.
QUIK: Towards End-to-End 4-Bit Inference on Generative Large Language Models
We show, for the first time, that the majority of inference computations for large generative models such as LLaMA, OPT, and Falcon can be performed with both weights and activations being cast to 4 bits, in a way that leads to practical speedups, while at the same time maintaining good accuracy.
Sparse Fine-tuning for Inference Acceleration of Large Language Models
While the standard approach is to leverage sparsity for computational reduction, we observe that in the case of memory-bound LLMs sparsity can also be leveraged for reducing memory bandwidth.
SPADE: Sparsity-Guided Debugging for Deep Neural Networks
Towards this goal, multiple tools have been proposed to aid a human examiner in reasoning about a network's behavior in general or on a set of instances.
Scaling Laws for Sparsely-Connected Foundation Models
We explore the impact of parameter sparsity on the scaling behavior of Transformers trained on massive datasets (i. e., "foundation models"), in both vision and language domains.
Accurate Neural Network Pruning Requires Rethinking Sparse Optimization
Obtaining versions of deep neural networks that are both highly-accurate and highly-sparse is one of the main challenges in the area of model compression, and several high-performance pruning techniques have been investigated by the community.
QIGen: Generating Efficient Kernels for Quantized Inference on Large Language Models
We present ongoing work on a new automatic code generation approach for supporting quantized generative inference on LLMs such as LLaMA or OPT on off-the-shelf CPUs.
The Power of Populations in Decentralized Bandits
We study a cooperative multi-agent bandit setting in the distributed GOSSIP model: in every round, each of $n$ agents chooses an action from a common set, observes the action's corresponding reward, and subsequently exchanges information with a single randomly chosen neighbor, which informs its policy in the next round.
Error Feedback Can Accurately Compress Preconditioners
Experiments on deep neural networks show that this approach can compress full-matrix preconditioners to up to 99\% sparsity without accuracy loss, effectively removing the memory overhead of full-matrix preconditioners such as GGT and M-FAC.
SpQR: A Sparse-Quantized Representation for Near-Lossless LLM Weight Compression
Recent advances in large language model (LLM) pretraining have led to high-quality LLMs with impressive abilities.
Knowledge Distillation Performs Partial Variance Reduction
We show that, in the context of linear and deep linear models, KD can be interpreted as a novel type of stochastic variance reduction mechanism.
Bias in Pruned Vision Models: In-Depth Analysis and Countermeasures
Pruning - that is, setting a significant subset of the parameters of a neural network to zero - is one of the most popular methods of model compression.
Vision Models Can Be Efficiently Specialized via Few-Shot Task-Aware Compression
To address this, we ask: can we quickly compress large generalist models into accurate and efficient specialists?
SparseProp: Efficient Sparse Backpropagation for Faster Training of Neural Networks
We provide a new efficient version of the backpropagation algorithm, specialized to the case where the weights of the neural network being trained are sparse.
ZipLM: Inference-Aware Structured Pruning of Language Models
Furthermore, ZipLM achieves superior results for a fraction of the computational cost relative to prior distillation and pruning techniques, making it a cost-effective approach for generating an entire family of smaller, faster, and highly accurate models, guaranteed to meet the desired inference specifications.
Quantized Distributed Training of Large Models with Convergence Guarantees
Communication-reduction techniques are a popular way to improve scalability in data-parallel training of deep neural networks (DNNs).
SparseGPT: Massive Language Models Can Be Accurately Pruned in One-Shot
We show for the first time that large-scale generative pretrained transformer (GPT) family models can be pruned to at least 50% sparsity in one-shot, without any retraining, at minimal loss of accuracy.
Ranked #1 on
Language Modelling
on WikiText-2
(using extra training data)
GPTQ: Accurate Post-Training Quantization for Generative Pre-trained Transformers
In this paper, we address this challenge, and propose GPTQ, a new one-shot weight quantization method based on approximate second-order information, that is both highly-accurate and highly-efficient.
L-GreCo: Layerwise-Adaptive Gradient Compression for Efficient and Accurate Deep Learning
Data-parallel distributed training of deep neural networks (DNN) has gained very widespread adoption, but can still experience communication bottlenecks.
Hybrid Decentralized Optimization: First- and Zeroth-Order Optimizers Can Be Jointly Leveraged For Faster Convergence
Distributed optimization has become one of the standard ways of speeding up machine learning training, and most of the research in the area focuses on distributed first-order, gradient-based methods.
CAP: Correlation-Aware Pruning for Highly-Accurate Sparse Vision Models
To further showcase CAP's accuracy and scalability, we use it to show for the first time that extremely-accurate large vision models, trained via self-supervised techniques, can also be pruned to moderate sparsities, with negligible accuracy loss.
GMP*: Well-Tuned Gradual Magnitude Pruning Can Outperform Most BERT-Pruning Methods
We revisit the performance of the classic gradual magnitude pruning (GMP) baseline for large language models, focusing on the classic BERT benchmark on various popular tasks.
Optimal Brain Compression: A Framework for Accurate Post-Training Quantization and Pruning
We consider the problem of model compression for deep neural networks (DNNs) in the challenging one-shot/post-training setting, in which we are given an accurate trained model, and must compress it without any retraining, based only on a small amount of calibration input data.
CrAM: A Compression-Aware Minimizer
In this work we propose a new compression-aware minimizer dubbed CrAM that modifies the optimization step in a principled way, in order to produce models whose local loss behavior is stable under compression operations such as pruning.
Communication-Efficient Federated Learning With Data and Client Heterogeneity
Federated Learning (FL) enables large-scale distributed training of machine learning models, while still allowing individual nodes to maintain data locally.
The Optimal BERT Surgeon: Scalable and Accurate Second-Order Pruning for Large Language Models
We perform an in-depth study of the accuracy-compression trade-off for unstructured weight pruning of BERT models.
Scaling the Wild: Decentralizing Hogwild!-style Shared-memory SGD
Our scheme is based on the following algorithmic tools and features: (a) asynchronous local gradient updates on the shared-memory of workers, (b) partial backpropagation, and (c) non-blocking in-place averaging of the local models.
SPDY: Accurate Pruning with Speedup Guarantees
The recent focus on the efficiency of deep neural networks (DNNs) has led to significant work on model compression approaches, of which weight pruning is one of the most popular.
How Well Do Sparse Imagenet Models Transfer?
Transfer learning is a classic paradigm by which models pretrained on large "upstream" datasets are adapted to yield good results on "downstream" specialized datasets.
CGX: Adaptive System Support for Communication-Efficient Deep Learning
CGX is based on two technical advances: \emph{At the system level}, it relies on a re-developed communication stack for ML frameworks, which provides flexible, highly-efficient support for compressed communication.
SSSE: Efficiently Erasing Samples from Trained Machine Learning Models
The availability of large amounts of user-provided data has been key to the success of machine learning for many real-world tasks.
M-FAC: Efficient Matrix-Free Approximations of Second-Order Information
We propose two new algorithms as part of a framework called M-FAC: the first algorithm is tailored towards network compression and can compute the IHVP for dimension $d$, if the Hessian is given as a sum of $m$ rank-one matrices, using $O(dm^2)$ precomputation, $O(dm)$ cost for computing the IHVP, and query cost $O(m)$ for any single element of the inverse Hessian.
AC/DC: Alternating Compressed/DeCompressed Training of Deep Neural Networks
The increasing computational requirements of deep neural networks (DNNs) have led to significant interest in obtaining DNN models that are sparse, yet accurate.
Ranked #1 on
Network Pruning
on CIFAR-100
NUQSGD: Provably Communication-efficient Data-parallel SGD via Nonuniform Quantization
As the size and complexity of models and datasets grow, so does the need for communication-efficient variants of stochastic gradient descent that can be deployed to perform parallel model training.
Fast Graphical Population Protocols
Let $G$ be a graph on $n$ nodes.
Distributed, Parallel, and Cluster Computing Data Structures and Algorithms
Sparsity in Deep Learning: Pruning and growth for efficient inference and training in neural networks
The growing energy and performance costs of deep learning have driven the community to reduce the size of neural networks by selectively pruning components.
Local SGD Meets Asynchrony
On the theoretical side, we show that this method guarantees ergodic convergence for non-convex objectives, and achieves the classic sublinear rate under standard assumptions.
Byzantine-Resilient Non-Convex Stochastic Gradient Descent
We study adversary-resilient stochastic distributed optimization, in which $m$ machines can independently compute stochastic gradients, and cooperate to jointly optimize over their local objective functions.
Scalable Belief Propagation via Relaxed Scheduling
The ability to leverage large-scale hardware parallelism has been one of the key enablers of the accelerated recent progress in machine learning.
Adaptive Gradient Quantization for Data-Parallel SGD
Many communication-efficient variants of SGD use gradient quantization schemes.
Towards Tight Communication Lower Bounds for Distributed Optimisation
We focus on the communication complexity of this problem: our main result provides the first fully unconditional bounds on total number of bits which need to be sent and received by the $N$ machines to solve this problem under point-to-point communication, within a given error-tolerance.
Improved Communication Lower Bounds for Distributed Optimisation
Motivated by the interest in communication-efficient methods for distributed machine learning, we consider the communication complexity of minimising a sum of $d$-dimensional functions $\sum_{i = 1}^N f_i (x)$, where each function $f_i$ is held by one of the $N$ different machines.
Stochastic Gradient Langevin with Delayed Gradients
Stochastic Gradient Langevin Dynamics (SGLD) ensures strong guarantees with regards to convergence in measure for sampling log-concave posterior distributions by adding noise to stochastic gradient iterates.
Breaking (Global) Barriers in Parallel Stochastic Optimization with Wait-Avoiding Group Averaging
For evaluation, we train ResNet-50 on ImageNet; Transformer for machine translation; and deep reinforcement learning for navigation at scale.
WoodFisher: Efficient Second-Order Approximation for Neural Network Compression
Second-order information, in the form of Hessian- or Inverse-Hessian-vector products, is a fundamental tool for solving optimization problems.
Efficiency Guarantees for Parallel Incremental Algorithms under Relaxed Schedulers
We show that, for algorithms such as Delaunay mesh triangulation and sorting by insertion, schedulers with a maximum relaxation factor of $k$ in terms of the maximum priority inversion allowed will introduce a maximum amount of wasted work of $O(log(n) poly (k) ), $ where $n$ is the number of tasks to be executed.
Data Structures and Algorithms Distributed, Parallel, and Cluster Computing
Relaxed Scheduling for Scalable Belief Propagation
The ability to leverage large-scale hardware parallelism has been one of the key enablers of the accelerated recent progress in machine learning.
On the Sample Complexity of Adversarial Multi-Source PAC Learning
We study the problem of learning from multiple untrusted data sources, a scenario of increasing practical relevance given the recent emergence of crowdsourcing and collaborative learning paradigms.
New Bounds For Distributed Mean Estimation and Variance Reduction
We provide a method of quantization which allows distributed mean estimation to be performed with solution quality dependent only on the distance between inputs, not on input norm, and show an analogous result for distributed variance reduction.
Elastic Consistency: A General Consistency Model for Distributed Stochastic Gradient Descent
Our framework, called elastic consistency enables us to derive convergence bounds for a variety of distributed SGD methods used in practice to train large-scale machine learning models.
Asynchronous Decentralized SGD with Quantized and Local Updates
Perhaps surprisingly, we show that a variant of SGD called \emph{SwarmSGD} still converges in this setting, even if \emph{non-blocking communication}, \emph{quantization}, and \emph{local steps} are all applied \emph{in conjunction}, and even if the node data distributions and underlying graph topology are both \emph{heterogenous}.
Provably Communication-efficient Data-parallel SGD via Nonuniform Quantization
As the size and complexity of models and datasets grow, so does the need for communication-efficient variants of stochastic gradient descent that can be deployed on clusters to perform model fitting in parallel.
Asynchronous Stochastic Subgradient Methods for General Nonsmooth Nonconvex Optimization
This is all the more surprising since these objectives are the ones appearing in the training of deep neural networks.
Powerset Convolutional Neural Networks
We present a novel class of convolutional neural networks (CNNs) for set functions, i. e., data indexed with the powerset of a finite set.
Taming Unbalanced Training Workloads in Deep Learning with Partial Collective Operations
Load imbalance pervasively exists in distributed deep learning training systems, either caused by the inherent imbalance in learned tasks or by the system itself.
MLSys: The New Frontier of Machine Learning Systems
Machine learning (ML) techniques are enjoying rapidly increasing adoption.
Distributed Learning over Unreliable Networks
Most of today's distributed machine learning systems assume {\em reliable networks}: whenever two machines exchange information (e. g., gradients or models), the network should guarantee the delivery of the message.
The Convergence of Sparsified Gradient Methods
Distributed training of massive machine learning models, in particular deep neural networks, via Stochastic Gradient Descent (SGD) is becoming commonplace.
The Convergence of Stochastic Gradient Descent in Asynchronous Shared Memory
Stochastic Gradient Descent (SGD) is a fundamental algorithm in machine learning, representing the optimization backbone for training several classic models, from regression to neural networks.
Byzantine Stochastic Gradient Descent
This paper studies the problem of distributed stochastic optimization in an adversarial setting where, out of the $m$ machines which allegedly compute stochastic gradients every iteration, an $\alpha$-fraction are Byzantine, and can behave arbitrarily and adversarially.
SparCML: High-Performance Sparse Communication for Machine Learning
This allreduce is the single communication and thus scalability bottleneck for most machine learning workloads.
Model compression via distillation and quantization
Deep neural networks (DNNs) continue to make significant advances, solving tasks from image classification to translation or reinforcement learning.
Compressive Sensing Using Iterative Hard Thresholding with Low Precision Data Representation: Theory and Applications
Modern scientific instruments produce vast amounts of data, which can overwhelm the processing ability of computer systems.
DataBright: Towards a Global Exchange for Decentralized Data Ownership and Trusted Computation
We illustrate that trusted computation can enable the creation of an AI market, where each data point has an exact value that should be paid to its creator.
ZipML: Training Linear Models with End-to-End Low Precision, and a Little Bit of Deep Learning
We examine training at reduced precision, both from a theoretical and practical perspective, and ask: is it possible to train models at end-to-end low precision with provable guarantees?
The Power of Choice in Priority Scheduling
We answer this question, showing that this strategy provides surprisingly strong guarantees: Although the single-choice process, where we always insert and remove from a single randomly chosen queue, has degrading cost, going to infinity as we increase the number of steps, in the two choice process, the expected rank of a removed element is $O( n )$ while the expected worst-case cost is $O( n \log n )$.
Data Structures and Algorithms Distributed, Parallel, and Cluster Computing
The ZipML Framework for Training Models with End-to-End Low Precision: The Cans, the Cannots, and a Little Bit of Deep Learning
When applied to linear models together with double sampling, we save up to another 1. 7x in data movement compared with uniform quantization.
QSGD: Communication-Efficient SGD via Gradient Quantization and Encoding
In this paper, we propose Quantized SGD (QSGD), a family of compression schemes which allow the compression of gradient updates at each node, while guaranteeing convergence under standard assumptions.
Streaming Min-max Hypergraph Partitioning
In many applications, the data is of rich structure that can be represented by a hypergraph, where the data items are represented by vertices and the associations among items are represented by hyperedges.
