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mu RAI: Securing Embedded Systems with Return Address Integrity

Embedded systems are deployed in security critical environments and have become a prominent target for remote attacks. Microcontroller-based systems (MCUS) are particularly vulnerable due to a combination of limited resources and low level programming whic ...

INTERNET SOC2020

Stretch: Balancing QoS and Throughput for Colocated Server Workloads on SMT Cores

Boris Robert Grot, Siddharth Gupta

In a drive to maximize resource utilization, today's datacenters are moving to colocation of latency-sensitive and batch workloads on the same server. State-of-the-art deployments, such as those at Google, colocate such diverse workloads even on a single S ...

IEEE2019

Linebacker: Preserving Victim Cache Lines in Idle Register Files of GPUs

Yunho Oh

Modern GPUs suffer from cache contention due to the limited cache size that is shared across tens of concurrently running warps. To increase the per-warp cache size prior techniques proposed warp throttling which limits the number of active warps. Warp thr ...

ASSOC COMPUTING MACHINERY2019

LTRF: Enabling High-Capacity Register Files for GPUs via Hardware/Software Cooperative Register Prefetching

Babak Falsafi, Mario Paulo Drumond Lages De Oliveira, Hamid Sarbazi-Azad, Seyed Borna Ehsani

Graphics Processing Units (GPUs) employ large register files to accommodate all active threads and accelerate context switching. Unfortunately, register files are a scalability bottleneck for future GPUs due to long access latency, high power consumption, ...

2018

Way Stealing: A Unified Data Cache and Architecturally Visible Storage for Instruction Set Extensions

Edoardo Charbon, Paolo Ienne, Ties Jan Henderikus Kluter, Philip Brisk

Way Stealing is a simple architectural modification to a cache-based processor that increases the data bandwidth to and from application-specific instruction set extensions (ISEs), which increase performance and reduce energy consumption. Way Stealing offe ...

Institute of Electrical and Electronics Engineers2014

Wearout-Aware Compiler-Directed Register Assignment for Embedded Systems

David Atienza Alonso

Although constant technology scaling has resulted in considerable benefits, smaller device dimensions, higher operating temperatures and electric fields have also contributed to faster device aging due to wearout. Not only does this result in the shortenin ...

IEEE Press2012

Making Wide-Issue VLIW Processors Viable on FPGAs

Paolo Ienne, Madhura Purnaprajna

Soft and highly-customized processors are emerging as a common way to efficiently control large amount of computing resources available on FPGAs. Yet, some processor architectures of choice for DSP and media applications, such as wide-issue VLIW processors ...

2012

Fast, Nearly Optimal ISE Identification with I/O Serialization through Maximal Clique Enumeration

Paolo Ienne, Philip Brisk, Ajay Kumar Verma

The last decade has witnessed the emergence of the application-specific instruction-set processor (ASIP) as a viable platform for embedded systems. Extensible ASIPs allow the user to augment a base processor with instruction set extensions (ISEs) that exec ...

2010

Thermal-Aware Compilation for Register Window-Based Embedded Processors

David Atienza Alonso, Mohamed Mostafa Sabry Aly

The development of compiler-based mechanisms to optimize the thermal profile of large register files to improve the processor reliability has become an important issue. Thermal hotspots have been known to cause severe reliability issues, while the thermal ...

Institute of Electrical and Electronics Engineers2010

Methodology for the Digital Calibration of Analog Circuits and Systems Using Sub-binary Radix DACs

Maher Kayal, Marc Pastre

This paper presents a methodology for digitally calibrating analog circuits and systems. Based on the detection of an imperfection by a simple comparator, a successive approximations algorithm tunes a compensation current. The latter is generated by a sub- ...

2010

An Optimal Linear-Time Algorithm for Interprocedural Register Allocation in High Level Synthesis Using SSA Form

Paolo Ienne, Philip Brisk, Ajay Kumar Verma

An optimal linear-time algorithm for interprocedural register allocation in high level synthesis is presented. Historically, register allocation has been modeled as a graph coloring problem, which is nondeterministic polynomial time-complete in general; ho ...

2010

Way Stealing: Cache-assisted Automatic Instruction Set Extensions

Edoardo Charbon, Paolo Ienne, Ties Jan Henderikus Kluter, Philip Brisk

This paper introduces Way Stealing, a simple architectural modification to a cache-based processor to increase data bandwidth to and from application-specific Instruction Set Extensions (ISEs). Way Stealing provides more bandwidth to the ISE-logic than the ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Methodology for the Digital Calibration of Analog Circuits and Systems Using Sub-binary Radix DACs

Maher Kayal, Marc Pastre

This paper presents a methodology for digitally calibrating analog circuits and systems. Based on the detection of an imperfection by a simple comparator, a successive approximations algorithm tunes a compensation current. The latter is generated by a sub- ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Register File Reliability Analysis Through Cycle-Accurate Thermal Emulation

David Atienza Alonso, Pablo Garcia del Valle, José Luis Ayala Rodrigo

Continuous transistor scaling due to improvements in CMOS devices and manufacturing technologies is increasing processor power densities and temperatures; thus, creating challenges when trying to maintain manufacturing yield rates and devices which will be ...

IEEE Computer Society2008

Joint Hardware-Software Leakage Minimization Approach for the Register File of VLIW Embedded Architectures

Giovanni De Micheli, David Atienza Alonso, José Luis Ayala Rodrigo

New applications demand very high processing power when run on embedded systems. Very Long Instruction Word (VLIW) architectures have emerged as a promising alternative to provide such processing capabilities under the given energy budget. However, in this ...

2008

A microprocessor having at least one application specific functional unit and method to design same

Paolo Ienne

Customisable embedded processors that are available on the market make it possible for designers to speed up execution of applications by using Application-specific Functional Units (AFUs), implementing Instruction-Set Extensions (ISEs). Furthermore, techn ...

2008

Fast, quasi-optimal, and pipelined instruction-set extensions

Paolo Ienne, Philip Brisk, Ajay Kumar Verma

Nowadays many customised embedded processors offer the possibility of speeding up an application by implementing it using Application-Specific Functional units (AFUs). However, the AFUs must satisfy certain constraints in terms of read and write ports betw ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

A scalable and oblivious atomicity assertion

Rachid Guerraoui, Marko Vukolic

This paper presents SOAR: the first oblivious atomicity assertion with polynomial complexity. SOAR enables to check atomicity of a single-writer multi-reader register implementation. The basic idea underlying the low overhead induced by SOAR lies in greedi ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2008

Sharing is Harder than Agreeing

Rachid Guerraoui

One of the most celebrated results of the theory of distributed computing is the impossibility, in an asynchronous system of

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processes that communicate through shared memory registers, to solve the set agreement problem where the processes need to deci ...

2008

Amnesic Distributed Storage

Rachid Guerraoui

Distributed storage algorithms implement the abstraction of a shared register over distributed base objects. We study a specific class of storage algorithms, which we call amnesic: these have the pragmatic property that old values written in the implemente ...

2007