Deterministic Constant-Amortized-RMR Abortable Mutex for CC and DSM

The abortable mutual exclusion problem, proposed by Scott and Scherer in response to the needs in real-time systems and databases, is a variant of mutual exclusion that allows processes to abort from their attempt to acquire the lock. Worst-case constant remote memory reference algorithms for mutual exclusion using hardware instructions such as Fetch&Add or Fetch&Store have long existed for both cache coherent (CC) and distributed shared memory multiprocessors, but no such algorithms are known for abortable mutual exclusion. Even relaxing the worst-case requirement to amortized, algorithms are only known for the CC model. In this article, we improve this state of the art by designing a deterministic algorithm that uses Fetch&Store to achieve amortized O (1) remote memory reference in both the CC and distributed shared memory models. Our algorithm supports Fast Abort (a process aborts within six steps of receiving the abort signal) and has the following additional desirable properties: it supports an arbitrary number of processes of arbitrary names, requires only O (1) space per process, and satisfies a novel fairness condition that we call Airline FCFS . Our algorithm is short with fewer than a dozen lines of code.

Representing Integer Sequences Using Piecewise-Affine Loops

A formal, high-level representation of programs is typically needed for static and dynamic analyses performed by compilers. However, the source code of target applications is not always available in an analyzable form, e.g., to protect intellectual property. To reason on such applications, it becomes necessary to build models from observations of its execution. This paper details an algebraic approach which, taking as input the trace of memory addresses accessed by a single memory reference, synthesizes an affine loop with a single perfectly nested reference that generates the original trace. This approach is extended to support the synthesis of unions of affine loops, useful for minimally modeling traces generated by automatic transformations of polyhedral programs, such as tiling. The resulting system is capable of processing hundreds of gigabytes of trace data in minutes, minimally reconstructing 100% of the static control parts in PolyBench/C applications and 99.99% in the Pluto-tiled versions of these benchmarks. As an application example of the trace modeling method, trace compression is explored. The affine representations built for the memory traces of PolyBench/C codes achieve compression factors of the order of 106 and 103 with respect to gzip for the original and tiled versions of the traces, respectively.

BELUM EFEKTIF TERHADAP SISTEM PENGELOLAAN KEARSIPANOLEH APARATUR SIPIL NEGARA, PADA UNIT PELAKSANA TEKNIS SEKOLAH USAHA PERIKANAN MENENGAH SORONG, DILINGKUNGAN KEMENTERIAN KELAUTAN DAN PERIKANAN

ABSTRAK: Telah dijelaskan dalam Undang-Undang Nomor 5 Tahun 2014 tentang Aparatur Sipil Negaradan Undang-Undang Nomor 43 Tahun 2009 tentang Kearsipan, bahwa dalam rangka pelaksanaancita-cita bangsa dan mewujudkan tujuan negara serta mempertahankan Negara Kesatuan Republik Indonesia sebagaimana tercantum dalam Pembukaan Undang-Undang Dasar NegaraRepublik Indonesia Tahun 1945, bahwa perlu dibangun aparatur sipil negara yang memilikiintegritas dan profesional mampu menyelenggarakan pelayanan publik bagi masyarakat terhadappengelolaan arsip sebagai identitas dan jati diri bangsa, serta sebagai memori, acuan dan bahanpertanggungjawaban dalam kehidupan bermasyarakat, berbangsa dan bernegara yang harusdikelola dan diselamatkan oleh negara, yang sesuai dengan prinsip, kaidah, dan standar kearsipansebagaimana yang dibutuhkan oleh suatu sistem penyelenggaraan kearsipan nasional yang andal. namun pada prinsipnya di Sekolah Usaha Perikanan Menengah Sorong Aparatur Sipil Negara belum efektif terhadap pengelolaan kearsipan yang baikABSTRACT: It has been explained in Law Number 5 of 2014 concerning State Civil Apparatus andLaw Number 43 of 2009 concerning Archives, that in the framework of implementing the ideals ofthe nation and realizing the state’s goals and maintaining the Unitary State of the Republic ofIndonesia as stated in the Opening of the Law The State Fundamentals of the Republic of Indonesiain 1945, that it is necessary to develop a state of integrity and professional civil apparatus capableof holding public services for the public to manage records as national identity and identity, and asa memory, reference and material responsibility in the life of the community, nation and state mustbe managed and saved by the state, in accordance with the principles, rules, and archival standardsas required by a system for the implementation of reliable national archives. but in principle in theSorong Middle School Fisheries Business School the State Civil Apparatus has not been effectivein managing good archives.