Publications de Babak Falsafi | EPFL Graph Search

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Prior research shows that database system performance is dominated by off-chip data stalls, resulting in a concerted effort to bring data into on-chip caches. At the same time, high levels of integration have enabled the advent of chip multiprocessors and ...

Recent research advocates address-correlating predictors to identify cache block addresses for prefetch. Unfortunately, address-correlating predictors require correlation data storage proportional in size to a program's active memory footprint. As a result ...

Emerging datacenter applications operate on vast datasets that are kept in DRAM to minimize latency. The large number of servers needed to accommodate this massive memory footprint requires frequent server-to-server communication in applications such as ke ...

With emerging storage-class memory (SCM) nearing commercialization, there is evidence that it will deliver the much-anticipated high density and access latencies within only a fewfactors of DRAM. Nevertheless, the latency-sensitive nature of memory-residen ...

DNN inference accelerators executing online services exhibit low average loads because of service demand variability, leading to poor resource utilization. Unfortunately, reclaiming idle inference cycles is difficult as other workloads can not execute on a ...

A system and method of coupling a Branch Target Buffer (BTB) content of a BTB with an instruction cache content of an instruction cache. The method includes: tagging a plurality of target buffer entries that belong to branches within a same instruction blo ...

With the end of Dennard scaling, server power has emerged as the limiting factor in the quest for more capable datacenters. Without the benefit of supply voltage scaling, it is essential to lower the energy per operation to improve server efficiency. As th ...

Manycore chips are emerging as the architecture of choice to provide power efficiency and improve performance, while riding Moore’s Law. In these architectures, on-chip interconnects play a pivotal role in ensuring power and performance scalability. As sup ...

Functional full-system simulators are powerful and versatile research tools for accelerating architectural exploration and advanced software development. Their main shortcoming is limited throughput when simulating large multiprocessor systems with hundred ...

Increases in on-chip communication delay and the large working sets of server and scientific workloads complicate the design of the on-chip last- level cache for multicore processors. The large working sets favor a shared cache design that maximizes the ag ...

Distributed shared-memory (DSM) multi- processors provide a scalable hardware platform, but lack the necessary redundancy for mainframe-level reliability and availability. Chip-level redundancy in a DSM server faces a key challenge: the increased latency t ...

Large-scale online services are commonly structured as a network of software tiers, which communicate over the datacenter network using RPCs. Ongoing trends towards software decomposition have led to the prevalence of tiers receiving and generating RPCs wi ...

Deep neural network (DNN) inference tasks are computationally expensive. Digital DNN accelerators offer better density and energy efficiency than general-purpose processors but still not sufficient to be deployable on resource-constrained settings.Analog c ...

L1 instruction-cache misses pose a critical performance bottleneck in commercial server workloads. Cache access latency constraints preclude L1 instruction caches large enough to capture the application, library, and OS instruction working sets of these wo ...

Emerging scale-out workloads require extensive amounts of computational resources. However, data centers using modern server hardware face physical constraints in space and power, limiting further expansion and calling for improvements in the computational ...

The escalating computational and memory demands of deep neural networks have outpaced chip density improvements, making arithmetic density a key bottleneck for GPUs. Scaled numeric formats, such as FP8 and Microscaling (MX), improve arithmetic density by a ...

Luiz Barroso started his career at Digital Equipment Corporation, investigating workload-optimized multiprocessor server architectures marketed to enterprises in the 1990s. These high-margin, low-volume products lost their market to more cost-effective ent ...

Emerging scale-out workloads need extensive amounts of computational resources. However, datacenters using modern server hardware face physical constraints in space and power, limiting further expansion and requiring improvements in the computational densi ...

The increasing demand for extracting value out of ever-growing data poses an ongoing challenge to system designers, a task only made trickier by the end of Dennard scaling. As the performance density of traditional CPU-centric architectures stagnates, adva ...

Babak Falsafi

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An Analysis of Database System Performance on Chip Multiprocessors

Last-touch correlated data streaming

Scale-Out NUMA

Design Guidelines for High-Performance SCM Hierarchies

Equinox: Training (for Free) on a Custom Inference Accelerator

Unified prefetching into instruction cache and branch target buffer

BuMP: Bulk Memory Access Prediction and Streaming

CCNoC: Specializing On-Chip Interconnects for Energy Efficiency in Cache-Coherent Servers

ProtoFlex: Towards Scalable, Full-System Multiprocessor Simulations Using FPGAs

Reactive NUCA: Near-Optimal Block Placement and Replication in Distributed Caches

Chip-Level Redundancy in Distributed Shared-Memory Multiprocessors

The NEBULA RPC-Optimized Architecture

Analog Neural Networks with Deep-submicron Nonlinear Synapses

Temporal instruction fetch streaming

Clearing the Clouds: A Study of Emerging Scale-out Workloads on Modern Hardware

Avant-Garde: Empowering GPUs with Scaled Numeric Formats

Server Architecture from Enterprise to Post-Moore

A Case for Specialized Processors for Scale-Out Workloads

Quantifying the Mismatch between Emerging Scale-Out Applications and Modern Processors

The Mondrian Data Engine