An evaluation of the state of time synchronization on leadership class supercomputers

We present a detailed examination of time agreement characteristics for nodes within extreme‐scale parallel computers. Using a software tool we introduce in this paper, we quantify attributes of clock skew among nodes in three representative high‐performance computers sited at three national laboratories. Our measurements detail the statistical properties of time agreement among nodes and how time agreement drifts over typical application execution durations. We discuss the implications of our measurements, why the current state of the field is inadequate, and propose strategies to address observed shortcomings

• Autores: Mondragón Martínez, Oscar Hernán; Jones, Terry; Bridges, Patrick; Ostrouchov, George; Koenig, Gregory A.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2019
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/11190
• Acceso en línea: http://hdl.handle.net/10614/11190; https://doi.org/10.1002/cpe.4341
• Palabra clave: Ingeniería de computación; Computer engineering; Clock synchronization; Large-scale systems; System software; Time service
• Rights: openAccess
• License: Derechos Reservados - Universidad Autónoma de Occidente