Alexandro Baldassin

Learn More
Although dynamic memory management accounts for a significant part of the execution time on many modern software systems, its impact on the performance of transactional memory systems has been mostly overlooked. In order to shed some light into this subject, this paper conducts a thorough investigation of the interplay between memory allocators and software(More)
Building applications that are responsive and can exploit parallel hardware while remaining simple to write, understand, test, and maintain, poses an important challenge for developers. In particular, it is often desirable to enable various tasks to read or modify shared data concurrently without requiring complicated locking schemes that may throttle(More)
Traditional software transactional memory designs are targeted towards performance and therefore little is known about their impact on energy consumption. We provide, in this paper, a comprehensive energy analysis of a standard STM design and propose novel scratchpad-based energy-aware STM design strategies. Experimental results collected through a(More)
Electronic system level (ESL) modeling allows early hardware-dependent software (HDS) development. Due to broad CPU diversity and shrinking time-to-market, HDS development can neither rely on hand-retargeting binary tools, nor can it rely on pre-existent tools within standard packages. As a consequence, binary utilities which can be easily adapted to new(More)
To realize the performance potential of multiple cores, software developers must architect their programs for concur-rency. Unfortunately, for many applications, threads and locks are difficult to use efficiently and correctly. Thus, researchers have proposed transactional memory as a simpler alternative. To investigate if and how software transactional(More)
Software Transactional Memory (STM) systems have poor performance under high contention scenarios. Since many transactions compete for the same data, most of them are aborted, wasting processor runtime. Contention management policies are typically used to avoid that, but they are passive approaches as they wait for an abort to happen so they can take(More)
—The well-known drawbacks imposed by lock-based synchronization have forced researchers to devise new alternatives for concurrent execution, of which transactional memory is a promising one. Extensive research has been carried out on Software Transaction Memory (STM), most of all concentrated on program performance, leaving unattended other metrics of great(More)
Software transaction memory (STM) systems have been used as an approach to improve performance, by allowing the concurrent execution of atomic blocks. However, under high-contention workloads, STM-based systems can considerably degrade performance, as transaction conflict rate increases. Contention management policies have been used as a way to select which(More)