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The memory controller is in charge of managing DRAM maintenance operations (e.g., refresh, RowHammer protection, memory scrubbing) to reliably operate modern DRAM chips. Implementing new maintenance operations often necessitates…

Hardware Architecture · Computer Science 2025-08-07 Hasan Hassan , Ataberk Olgun , A. Giray Yaglikci , Haocong Luo , Onur Mutlu

As data-intensive applications increasingly strain conventional computing systems, processing-in-memory (PIM) has emerged as a promising paradigm to alleviate the memory wall by minimizing data transfer between memory and processing units.…

Emerging Technologies · Computer Science 2026-02-05 Thomas Neuner , Henriette Padberg , Lior Kornblum , Eilam Yalon , Pedram Khalili Amiri , Shahar Kvatinsky

Non-volatile memory (NVM) is a class of promising scalable memory technologies that can potentially offer higher capacity than DRAM at the same cost point. Unfortunately, the access latency and energy of NVM is often higher than those of…

Hardware Architecture · Computer Science 2018-05-01 HanBin Yoon , Justin Meza , Rachata Ausavarungnirun , Rachael A. Harding , Onur Mutlu

The rapid advancements in AI, scientific computing, and high-performance computing (HPC) have driven the need for versatile and efficient hardware accelerators. Existing tools like SCALE-Sim v2 provide valuable cycle-accurate simulations…

Performance · Computer Science 2025-05-12 Ritik Raj , Sarbartha Banerjee , Nikhil Chandra , Zishen Wan , Jianming Tong , Ananda Samajdar , Tushar Krishna

Memory compilers are necessary tools to boost the design procedure of digital circuits. However, only a few are available to academia. Resistive Random Access Memory (RRAM) is characterised by high density, high speed, non volatility and is…

Emerging Technologies · Computer Science 2022-06-02 Dimitris Antoniadis , Andrea Mifsud , Peilong Feng , Timothy G. Constandinou

Processing-using-DRAM has been proposed for a limited set of basic operations (i.e., logic operations, addition). However, in order to enable full adoption of processing-using-DRAM, it is necessary to provide support for more complex…

This paper summarizes the SoftMC DRAM characterization infrastructure, which was published in HPCA 2017, and examines the work's significance and future potential. SoftMC (Soft Memory Controller) is the first publicly-available DRAM testing…

Hardware Architecture · Computer Science 2018-05-09 Hasan Hassan , Nandita Vijaykumar , Samira Khan , Saugata Ghose , Kevin Chang , Gennady Pekhimenko , Donghyuk Lee , Oguz Ergin , Onur Mutlu

Processing-using-DRAM has been proposed for a limited set of basic operations (i.e., logic operations, addition). However, in order to enable the full adoption of processing-using-DRAM, it is necessary to provide support for more complex…

Resistive random-access memory (RRAM) is gaining popularity due to its ability to offer computing within the memory and its non-volatile nature. The unique properties of RRAM, such as binary switching, multi-state switching, and device…

Emerging Technologies · Computer Science 2024-07-08 Simranjeet Singh , Farhad Merchant , Sachin Patkar

This paper presents a simulation platform, namely CIMulator, for quantifying the efficacy of various synaptic devices in neuromorphic accelerators for different neural network architectures. Nonvolatile memory devices, such as resistive…

Processing large numbers of key/value lookups is an integral part of modern server databases and other "Big Data" applications. Prior work has shown that hash table based key/value lookups can benefit significantly from using a dedicated…

Hardware Architecture · Computer Science 2021-05-17 Joshua Landgraf , Scott Lloyd , Maya Gokhale

Non-volatile memory (NVM) is a promising technology for low-energy and high-capacity main memory of computers. The characteristics of NVM devices, however, tend to be fundamentally different from those of DRAM (i.e., the memory device…

Distributed, Parallel, and Cluster Computing · Computer Science 2020-01-08 Atsushi Koshiba , Takahiro Hirofuchi , Ryousei Takano , Mitaro Namiki

The growing demands in the training and inference of Large Language Models (LLMs) are accelerating the adoption of scale-up systems that extend server shared memory through the use of Compute Express Link (CXL)-based load/store…

Hardware Architecture · Computer Science 2026-04-01 Karan Pathak , David Atienza , Marina Zapater

This retrospective paper describes the RowHammer problem in Dynamic Random Access Memory (DRAM), which was initially introduced by Kim et al. at the ISCA 2014 conference~\cite{rowhammer-isca2014}. RowHammer is a prime (and perhaps the…

Cryptography and Security · Computer Science 2019-04-23 Onur Mutlu , Jeremie S. Kim

Rowhammer is a critical vulnerability in dynamic random access memory (DRAM) that continues to pose a significant threat to various systems. However, we find that conventional load-based attacks are becoming highly ineffective on the most…

Cryptography and Security · Computer Science 2025-10-21 Weijie Chen , Shan Tang , Yulin Tang , Xiapu Luo , Yinqian Zhang , Weizhong Qiang

Our ISCA 2014 paper provided the first scientific and detailed characterization, analysis, and real-system demonstration of what is now popularly known as the RowHammer phenomenon (or vulnerability) in modern commodity DRAM chips, which are…

Cryptography and Security · Computer Science 2023-06-29 Onur Mutlu

Memristor crossbars are circuits capable of performing analog matrix-vector multiplications, overcoming the fundamental energy efficiency limitations of digital logic. They have been shown to be effective in special-purpose accelerators for…

RowHammer is a circuit-level DRAM vulnerability where repeatedly accessing (i.e., hammering) a DRAM row can cause bit flips in physically nearby rows. The RowHammer vulnerability worsens as DRAM cell size and cell-to-cell spacing shrink.…

Cryptography and Security · Computer Science 2021-10-22 Lois Orosa , Abdullah Giray Yağlıkçı , Haocong Luo , Ataberk Olgun , Jisung Park , Hasan Hassan , Minesh Patel , Jeremie S. Kim , Onur Mutlu

RRAM technology has experienced explosive growth in the last decade, with multiple device structures being developed for a wide range of applications. However, transitioning the technology from the lab into the marketplace requires the…

Simulation is a prospective method for generating diverse and realistic traffic scenarios to aid in the development of driving decision-making systems. However, existing simulators often fall short in diverse scenarios or interactive…

Machine Learning · Computer Science 2024-05-21 Yueyuan Li , Songan Zhang , Mingyang Jiang , Xingyuan Chen , Yeqiang Qian , Chunxiang Wang , Ming Yang