• Dynamic transaction coalescing 

      Stipic, Srdjan; Karakostas, Vasileios; Smiljkovic, Vesna; Gajinov, Vladimir; Unsal, Osman Sabri; Cristal Kestelman, Adrián; Valero Cortés, Mateo (Association for Computing Machinery (ACM), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Prior work in Software Transactional Memory has identified high overheads related to starting and committing transactions that may degrade the application performance. To amortize these overheads, transaction coalescing ...
    • Exploiting page table locality for Agile TLB Prefetching 

      Vavouliotis, Georgios; Alvarez Martí, Lluc; Karakostas, Vasileios; Nikas, Konstantinos; Koziris, Nectarios; Jiménez, Daniel A.; Casas, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      Frequent Translation Lookaside Buffer (TLB) misses incur high performance and energy costs due to page walks required for fetching the corresponding address translations. Prefetching page table entries (PTEs) ahead of ...
    • Improving the energy efficiency of hardware-assisted watchpoint systems 

      Karakostas, Vasileios; Tomić, Saša; Unsal, Osman Sabri; Nemirovsky, Mario; Cristal Kestelman, Adrián (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Hardware-assisted watchpoint systems enhance the execution of numerous dynamic software techniques, such as memory protection, module isolation, deterministic execution, and data race detection. In this paper, we show ...
    • Improving the performance and energy-efficiency of virtual memory 

      Karakostas, Vasileios (Universitat Politècnica de Catalunya, 2016-04-18)
      Tesi
      Accés obert
      Virtual memory improves programmer productivity, enhances process security, and increases memory utilization. However, virtual memory requires an address translation from the virtual to the physical address space on every ...
    • NEMsCAM: A novel CAM cell based on nano-electro-mechanical switch and CMOS for energy efficient TLBs 

      Seyedi, Azam; Karakostas, Vasileios; Cosemans, Stefan; Cristal Kestelman, Adrián; Nemirovsky, Mario; Unsal, Osman (Institute of Electrical and Electronics Engineers (IEEE), 2015-07-10)
      Text en actes de congrés
      Accés obert
      In this paper we propose a novel Content Addressable Memory (CAM) cell, NEMsCAM, based on both Nano-electro-mechanical (NEM) switches and CMOS technologies. The memory component of the proposed CAM cell is designed with ...
    • Validation, Verification, and Testing (VVT) of future RISC-V powered cloud infrastructures: the Vitamin-V Horizon Europe Project perspective 

      Alonso García, Martí; Andreu Gerique, David; Canal Corretger, Ramon; Di Carlo, Stefano; Chenet, Cristiano; Costa Prats, Juan José; Gironès, Andreu; Gizopoulos, Dimitris; Karakostas, Vasileios; Otero Calviño, Beatriz; Papadimitriou, George; Rodríguez Luna, Eva; Savino, Alessandro (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      Vitamin-V is a project funded under the Horizon Europe program for the period 2023-2025. The project aims to create a complete open-source software stack for RISC-V that can be used for cloud services. This software stack ...