New approaches for track reconstruction in LHCb's Vertex Locator

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Virtual Ways: Low-Cost Coherence for Instruction Set Extensions with Architecturally Visible Storage

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

Instruction set extensions (ISEs) improve the performance and energy consumption of application-specific processors. ISEs can use architecturally visible storage (AVS), localized compiler-controlled memories, to provide higher I/O bandwidth than reading da ...

Assoc Computing Machinery2014

Multi-Agent Learning for Resource Allocation Problems

Ludek Cigler

We analyze resource allocation problems where N independent agents want to access C resources. Each resource can be only accessed by one agent at a time. In order to use the resources efficiently, the agents need to coordinate their access. We focus on dec ...

EPFL2013

Toward Predictable Performance in Software Packet-Processing Platforms

Aikaterini Argyraki, Mihai Dobrescu

To become a credible alternative to specialized hardware, general-purpose networking needs to offer not only flexibility, but also predictable performance. Recent projects have demonstrated that general-purpose multicore hardware is capable of high-perform ...

2012

OLTP on Hardware Islands

Anastasia Ailamaki, Ippokratis Pandis, Danica Porobic, Pinar Tözün, Miguel Sérgio De Oliveira Branco

Modern hardware is abundantly parallel and increasingly heterogeneous. The numerous processing cores have non-uniform access latencies to the main memory and to the processor caches, which causes variability in the communication costs. Unfortunately, datab ...

2012

TurboTag: Lookup Filtering to Reduce Coherence Directory Power

Babak Falsafi, Michael Ferdman, Pejman Lotfi Kamran

On-chip coherence directories of today’s multi-core systems are not energy efficient. Coherence directories dissipate a significant fraction of their power on unnecessary lookups when running commercial server and scientific workloads. These workloads have ...

ACM2010

Architecture of a Real-Time Platform Independant GPS L1 Software Receiver

Personal digital assistants or mobile phones applications are not anymore restricted to multimedia or wireless communications, but have been extended to handle Global Positioning System (GPS) functionalities. Consequently, the growing market of GPS capable ...

EPFL2010

In contextual modulation, bigger is not better for low luminance stimuli

Michael Herzog, Mauro Manassi

Performance on a target can be modified by contextual elements. For example, thresholds strongly increase when a vernier is flanked by two lines. Increasing the number of flankers reduces contextual interference when the flankers are shorter or longer than ...

2010