• Clearing the Shadows: Recovering Lost Performance for Invisible Speculative Execution through HW/SW Co-Design 

      Tran, Kim-anh; Sakalis, Christos; Själander, Magnus; Ros, Alberto; Kaxiras, Stefanos; Jimborean, Alexandra (Chapter, 2020)
      Out-of-order processors heavily rely on speculation to achieve high performance, allowing instructions to bypass other slower instructions in order to fully utilize the processor's resources. Speculatively executed ...
    • Efficient invisible speculative execution through selective delay and value prediction 

      Sakalis, Christos; Kaxiras, Stefanos; Ros, Alberto; Jimborean, Alexandra; Själander, Magnus (Journal article; Peer reviewed, 2019)
      Speculative execution, the base on which modern high-performance general-purpose CPUs are built on, has recently been shown to enable a slew of security attacks. All these attacks are centered around a common set of ...
    • Evaluating the Potential Applications of Quaternary Logic for Approximate Computing 

      Sakalis, Christos; Jimborean, Alexandra; Kaxiras, Stefanos; Själander, Magnus (Journal article, 2019)
      There exist extensive ongoing research efforts on emerging atomic-scale technologies that have the potential to become an alternative to today’s complementary metal--oxide--semiconductor technologies. A common feature among ...
    • Ghost loads: what is the cost of invisible speculation? 

      Sakalis, Christos; Alipour, Mehdi; Ros, Alberto; Jimborean, Alexandra; Kaxiras, Stefanos; Själander, Magnus (Chapter, 2019)
      Speculative execution is necessary for achieving high performance on modern general-purpose CPUs but, starting with Spectre and Meltdown, it has also been proven to cause severe security flaws. In case of a misspeculation, ...