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Publications associées (124)

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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

Cooperative Update Exchange in the Youtopia System

Christoph Koch

Youtopia is a platform for collaborative management and integration of relational data. At the heart of Youtopia is an update exchange abstraction: changes to the data propagate through the system to satisfy user-specified mappings. We present a novel chan ...

2009

Preventing versus Curing: Avoiding Conflicts in Transactional Memories

Rachid Guerraoui, Aleksandar Dragojevic, Vasu Singh

Transactional memories are typically speculative and rely on contention managers to cure conflicts. This paper explores a complementary approach that prevents conflicts by scheduling transactions according to predictions on their access sets. We first expl ...

2009

Elastic Transactions

Rachid Guerraoui, Vincent Gramoli, Pascal Felber

This paper presents elastic transactions, a variant of the transactional model. Upon conflict detection, an elastic transaction might drop what it did so far within a separate transaction that immediately commits, and initiate a new transaction which might ...

Springer2009

Transactions in the Jungle

Rachid Guerraoui, Michal Kapalka, Vasu Singh

Transactional memory (TM) has shown potential to simplify the task of writing concurrent programs. However, the semantics of interactions between transactions managed by a TM and non-transactional operations, while widely studied, lacks a clear formal spec ...

2009

How Live Can a Transactional Memory Be?

Rachid Guerraoui, Michal Kapalka

This paper asks how much liveness a transactional memory (TM) implementation can guarantee. We first devise a formal framework for reasoning about liveness properties of TMs. Then, we prove that the strongest liveness property that a TM can ensure in an as ...

2009

Improving OLTP Scalability Using Speculative Lock Inheritance

Anastasia Ailamaki, Frederick Ryan Johnson, Ippokratis Pandis

Transaction processing workloads provide ample request level concurrency which highly parallel architectures can exploit. However, the resulting heavy utilization of core database services also causes resource contention within the database engine itself a ...

2009

The Semantics of Progress in Lock-Based Transactional Memory

Rachid Guerraoui, Michal Kapalka

Transactional memory (TM) is a promising paradigm for concurrent programming. Whereas the number of TM implementations is growing, however, little research has been conducted to precisely define TM semantics, especially their progress guarantees. This pape ...

ACM2009

On the weakest failure detector ever

Rachid Guerraoui

Many problems in distributed computing are impossible to solve when no information about process failures is available. It is common to ask what information about failures is necessary and sufficient to circumvent some specific impossibility, e. g., consen ...

Springer Verlag2009

Multiversion concurrency control for the generalized search tree

Boi Faltings, Ion Constantinescu, Samuel Spycher

Many read-intensive systems where fast access to data is more important than the rate at which data can change make use of multidimensional index structures, like the generalized search tree (GiST). Although in these systems the indexed data are rarely upd ...

2009