CERN Accelerating science

Article
Title	Adding multi-core support to the ALICE Grid Middleware
Author(s)	Weisz, Sergiu (Bucharest, Polytechnic Inst.) ; Ferrer, Marta Bertran (CERN)
Publication	2023
Number of pages	7
In:	J. Phys. : Conf. Ser. 2438 (2023) 012009
In:	20th International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT 2021), Daejeon, Korea, 29 Nov - 3 Dec 2021, pp.012009
DOI	10.1088/1742-6596/2438/1/012009
Subject category	Computing and Computers
Abstract	The major upgrade of the ALICE experiment for the LHC Run3 poses unique challenges and opportunities for new software development. In particular, the entirely new data taking and processing software of ALICE relies on process parallelism and large amounts of shared objects in memory. Thus from a single-core single thread workload in the past, the new workloads are exclusively multithreaded. This requires a profound change in the ALICE Grid midleware job handling, from scheduling to execution, and thus the entire middleware has been rewritten during the past 3 years to support the new multithreaded reality.This paper presents the ALICE middlewre development for multi-core job management and the tools used to achieve an efficient and secure environment. In particular, it covers job isolation and scheduling and how they can be implemented in different site configurations, such as sites shared with other experiments or High Performance Computing resources.
Copyright/License	© 2023-2025 The author(s) (License: CC-BY-3.0)

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