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Meet the Finalists for the 2023 Pwnie Awards

Hosts Sophia d'Antoine and Ian Roos presented the list at Summercon in Brooklyn, where they also handed out a surprise Lifetime Achievement Award.

United statesJonathan manziPietro borrelloBen nassiZubair shafiqPeiter zatkoFlorian rothJonathan scottDino dai zoviLuyi xingCristiano giuffridaJason loweMatilda backendalJiale guanHerbert bosZurich roos

Branch predictor: How many if s are too many? Including x86 and M1 benchmarks!

Branch predictor: How many if s are too many? Including x86 and M1 benchmarks!
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33 hardware and firmware vulnerabilities: A guide to the threats

Getty Images In January 2018, the entire computer industry was put on alert by two new processor vulnerabilities dubbed Meltdown and Spectre that defeated the fundamental OS security boundaries separating kernel and user space memory. The flaws stemmed from a performance feature of modern CPUs known as speculative execution and mitigating them required one of the biggest patch coordination efforts in history, involving CPU makers, device manufacturers and operating system vendors. Meltdown and Spectre were certainly not the first vulnerabilities to result from a hardware design decision, but their widespread impact sparked the interest of the security research community into such flaws. Since then, many researchers, both from academia and the private sector, have been studying the low-level operation of CPUs and other hardware components and have been uncovering more and more issues.

United kingdomXilinx fpgasIntel software guard extensionsSpeculative store bypassUniversity of birminghamBranch target bufferHelmholtz centerHorst goertz instituteIt security at ruhr university bochumGraz university of technologyRogue data cache loadRogue system register readProtection key bypassBounds check bypassHistory tableMicroarchitectural data sampling

ARM Cortex-A72 fetch and branch processing | Sand, software and sound

Posted on Let’s take a closer look at instruction fetch, decode and dispatch in the Cortex-A72 micro-architecture. These are the “front-end” stages of the core pipeline. The “back-end” of the pipeline consists of the register file(s), execution units and retirement (reorder) buffer. Branch prediction is frequently associated with the front-end since it directly affects instruction fetch. [Update: This post is part 1 of a two part series. Part 2 discusses ARM Cortex-A72 execution and load/store operations.] The front-end has one major job: Fetch ARMv8 instructions and keep the back-end execution units as busy as possible. This page is required reading for Raspberry Pi 4 (BCM2711, ARM Cortex-A72) programmers who want to tune their programs for the ARM Cortex-A72. It is also necessary background information for programmers doing performance measurement with PERF (Performance Events for Linux) on Raspberry Pi 4.

Paulj drongowskiSoftware optimizationLoad orBranch target bufferPerformance eventsOptimization guidePattern history tableReturn stackமென்பொருள் தேர்வுமுறைசுமை அல்லதுகிளை இலக்கு இடையகசெயல்திறன் நிகழ்வுகள்தேர்வுமுறை வழிகாட்டிமுறை வரலாறு மேசைதிரும்ப அடுக்கு