WebModel: x86-TSO, it is explained the model that x86 uses, the TSO model and how this model pro-vides to compiler the ability to reorder the memory instructions and the optimizations which are arising due to the memory reordering. Moreover, the memory barriers of this model are described, providing to the programmer a useful tool for program writing. WebJul 1, 2014 · Our work is part of a larger effort to verify a realistic Java implementation integrated ci within the CompCertTSO verified compiler stack [Sev ´k et al. 2013]. The refinement technique supports TSO relaxed memory semantics to allow the verification of low-level concurrent code in the context of x86 multiprocessors.

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WebJul 7, 2016 · We present a technique for efficient stateless model checking of programs that execute under the relaxed memory models TSO and PSO. The basis for our technique is a … Webx86-TSO relaxed memory model. We use an approach in which the pro-gram to be veri ed is rst transformed, so that it itself encodes the relaxed memory behavior, and after that it is veri ed by an explicit-state model checker supporting only the standard sequentially consis-tent memory. The novelty of our approach is in a careful design of an fontana credit takarékszövetkezet szeged

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WebNov 13, 2015 · Specifically, our approach achieved a wait-free fast path for thread-local reads on x86-TSO relaxed memory systems, and simultaneously achieved precise tracing of exact read-after-write, write-after-write and write-after-read dependences on the fly. Consistency models deal with how multiple threads (or workers, or nodes, or replicas, etc.)see the world.Consider this simple program, running two threads,and where A and B are initially both 0: To understand what this … See more It’s not only hardware that reorders memory operations—compilers do it all the time. Consider this program: This program always prints a string of 100 1s. Of course, the write to X inside … See more One nice way to think about sequential consistency is as a switch. At each time step, the switch selects a thread to run, and runs its next … See more Outside of coherence, a single main memory is often unnecessary. Consider this example again: There’s no reason why performing event (2) (a read from B) needs to wait until event (1) (a write to A) completes. They don’t … See more WebVerifying Fence Elimination Optimisations Viktor Vafeiadis 1 and Francesco Zappa Nardelli 2 1 MPI-SWS 2 INRIA Abstract. We consider simple compiler optimisations for removing re- dundant memory fences in programs running on top of the x86-TSO relaxed memory model. While the optimisations are performed using standard thread-local control flow analyses, … font zigzag