19-23 May 2014
LAPP
Europe/Paris timezone

Scheduling of multicore jobs

20 May 2014, 17:00
25m
Auditorium Marcel Vivargent (LAPP)

Auditorium Marcel Vivargent

LAPP

9 Chemin de Bellevue 74940 Annecy-le-Vieux FRANCE <b>GPS coordinates :</b> N 45° 55' 14.002'' E 6° 9' 33.998''
Computing & Batch Services Computing and batch systems

Speaker

Nathalie Rauschmayr (CERN)

Description

Nowadays, the Worldwide LHC Computing Grid consists of multi and manycore CPUs. A lot of work is undertaken by the experiments and the HEP community, in order to use these resources more efficiently. As a result, the parallelization of applications has been the main goal so far in order to allow a parallel execution of jobs. However, experiments must also consider how to schedule multicore jobs within the Computing Grid. Taking into account the trend of going towards manycore architectures, tasks might not scale sufficiently well on large number of cores. Since non linear speedup can drastically decrease overall throughput, a scheduler must define the best degree of parallelism for each job. The aim of the presentation is to define the scheduling problem and to present algorithms to solve it. Related problems, like estimation of job runtimes, will be also discussed.

Primary author

Presentation Materials