By Yehuda Afek, Haim Kaplan, Boris Korenfeld, Adam Morrison, Robert E. Tarjan (auth.), Marcos K. Aguilera (eds.)
ISBN-10: 3642336507
ISBN-13: 9783642336508
ISBN-10: 3642336515
ISBN-13: 9783642336515
This booklet constitutes the refereed court cases of the twenty sixth foreign Symposium on dispensed Computing, DISC 2012, held in Salvador, Brazil, in October 2012.
The 27 revised complete papers awarded including 24 short bulletins have been rigorously reviewed and chosen from 119 submissions. The papers are prepared in topical sections on shared reminiscence, cellular brokers and overlay networks, instant and a number of entry channel networks, dynamic networks, allotted graph algorithms, instant and loosely hooked up networks, robots, and reduce bounds and separation.
Read or Download Distributed Computing: 26th International Symposium, DISC 2012, Salvador, Brazil, October 16-18, 2012. Proceedings PDF
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Extra resources for Distributed Computing: 26th International Symposium, DISC 2012, Salvador, Brazil, October 16-18, 2012. Proceedings
Sample text
A wait-free, linearizable, unbounded Fetch&Inc object shared by p processes on which at most n fi operations are performed can be implemented so that each fi takes O(log p log n) steps and each read takes O(1) steps. Proof (sketch). T is first updated during an APPEND (not necessarily performed by the same process) to point to the root a tree that contains information about this instance. At each node v of τ , the length of the sequence represented by any tree in Tv is at most n, so each operation on Tv can be performed in O(log n) steps.
Of transitions by a CPU affecting solely its registers, only calls and returns are recorded in traces. We assume that parameters and return values of library methods are passed via CPU registers, and thus record their values in call and return actions. We use the standard notation for traces: τ (i) is the i-th action in the trace τ , |τ | is its length, and τ |t its projection to actions by CPU t. We denote the concatenation of two traces τ1 and τ2 with τ1 τ2 . Given a suitable formalisation of the abstract machine transitions, we can define the set of traces C(L) TSO generated by executions of the program C(L) on TSO [7, Appendix A].
Rm } storing values from Val. In TSO, processors do not write to memory directly. Instead, every CPU has a store buffer, which holds write requests that were issued by the CPU, but have not yet been flushed into the shared memory. The state of a buffer is described by a sequence of location-value pairs. The machine executes programs of the following form: L ::= {m = Cm | m ∈ M } C(L) ::= let L in C1 ... CNCPUs A program C(L) consists of a declaration of a library L, implementing methods m ∈ M ⊆ Method by commands Cm , and its client, specifying a command Ct to be run by the (hardware) thread in each CPU t.
Distributed Computing: 26th International Symposium, DISC 2012, Salvador, Brazil, October 16-18, 2012. Proceedings by Yehuda Afek, Haim Kaplan, Boris Korenfeld, Adam Morrison, Robert E. Tarjan (auth.), Marcos K. Aguilera (eds.)
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