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  1. Proceedings of the 2012 ACM SIGPLAN Workshop on Memory Systems Performance and Correctness (MSPC '12)
  2. Can seqlocks get along with programming language memory models?
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Identifying optimal multicore cache hierarchies for loop-based parallel programs via reuse distance analysis
Rank idle time prediction driven last-level cache writeback
Parallel memory defragmentation on a GPU
A higher order theory of locality
Can parallel data structures rely on automatic memory managers?
Can seqlocks get along with programming language memory models?
Trace-driven simulation of memory system scheduling in multithread application
Analysis of pure methods using garbage collection
Supporting virtual memory in GPGPU without supporting precise exceptions
Towards region-based memory management for Go
A study towards optimal data layout for GPU computing
Design space exploration of memory model for heterogeneous computing
Defensive loop tiling for multi-core processor

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Can seqlocks get along with programming language memory models?

Content Provider ACM Digital Library
Author Boehm, Hans-J.
Abstract Seqlocks are an important synchronization mechanism and represent a significant improvement over conventional reader-writer locks in some contexts. They avoid the need to update a synchronization variable during a reader critical section, and hence improve performance by avoiding cache coherence misses on the lock object itself. Unfortunately, they rely on speculative racing loads inside the critical section. This makes them an interesting problem case for programming-language-level memory models that emphasize data-race-free programming. We analyze a variety of implementation alternatives within the C++11 memory model, and briefly address the corresponding issue in Java. In the process, we observe that there may be a use for "read-dont-modify-write" operations, i. e. read-modify-write operations that atomically write back the original value, without modifying it, solely for the memory model consequences, and that it may be useful for compilers to optimize such operations.
Starting Page 12
Ending Page 20
Page Count 9
File Format PDF
ISBN 9781450312196
DOI 10.1145/2247684.2247688
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2012-06-16
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Java C++ Atomic operations Fences Reader-writer locks Sequence numbers Seqlocks Memory model
Content Type Text
Resource Type Article
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