Brief Announcement: Breaching the Wall of Impossibility Results on Disjoint-Access Parallel TM
نویسندگان
چکیده
Transactional Memory (TM) implementations guaranteeing disjoint-access parallelism (DAP) are desirable on multi-core architectures because they can exploit low-level parallelism. In this paper we look for a breach in the wall of existing impossibility results on DAP TMs, by identifying the strongest consistency and liveness guarantees that a DAP TM can ensure while maximizing efficiency in read-dominated workloads. Along the path of designing this protocol, we report two impossibility results related to ensuring real-time order in a DAP TM.
منابع مشابه
Breaching the Wall of Impossibility Results on Disjoint-Access Parallel TM
Transactional Memory (TM) implementations guaranteeing disjoint-access parallelism (DAP) are desirable on multi-core architectures because they can exploit low-level parallelism. In this paper we look for a breach in the wall of existing impossibility results on DAP TMs, by identifying the strongest consistency and liveness guarantees that a DAP TM can ensure while maximizing efficiency in read...
متن کاملInherent Limitations on Disjoint-Access Parallel Implementations of Transactional Memory (Preliminary Version)
Transactional memory (TM) is a promising approach for designing concurrent data structures, and it is essential to develop better understanding of the formal properties that can be achieved by TM implementations. Two fundamental properties of TM implementations are disjoint-access parallelism, which is critical for their scalability, and the invisibility of read operations, which reduces memory...
متن کاملDistributed Quantum Computing
In conjunction with DISC 2013, the TransForm project (Marie Curie Initial Training Network) and EuroTM (COST Action IC1001) supported the 5th edition of the Workshop on the Theory of Transactional Memory (WTTM 2013). The objective of WTTM was to discuss new theoretical challenges and recent achievements in the area of transactional computing with emphasis on transactional memory. The workshop t...
متن کاملSnapshot Isolation Does Not Scale Either
Transactional memory (TM) [11, 15] allows concurrent processes to execute operations on data items within atomic blocks of instructions, called transactions. A transaction may either commit in which case all its updates become visible to other transactions, or abort in which case all its updates are discarded. The paradigm is appealing for its simplicity but implementing it efficiently is chall...
متن کاملDisjoint-Access Parallelism Does Not Entail Scalability
Disjoint Access Parallelism (DAP) stipulates that operations involving disjoint sets of memory words must be able to progress independently, without interfering with each other. In this work we argue towards revising the two decade old wisdom saying that DAP is a binary condition that splits concurrent programs into scalable and non-scalable. We first present situations where DAP algorithms sca...
متن کامل