click to view the MPEG movie (cliquez pour voir le film MPEG)

Rotation about the X axis of the Lorenz attractor (5000 iterations), computed simultaneously on two different computers [Rotation autour de l'axe X de l'attracteur de Lorenz (5000 itérations), calculée sur deux ordinateurs différents].




The Lorenz differential equation system is solved 128 times for exactly the same initial conditions. Each one of the 128 computations is run either on the computer A or on the computer B, depending of their instaneous work load. Computers A and B are identical except for their system release. To distinguish the 128 different computations, each one has its own point of view (using a 3D rotation applied after the computation). For 1000 iterations (see "Rotation about the X axis of the Lorenz attractor (1000 iterations), computed simultaneously on two different computers"), the resulting animation shows no defect, when for 5000 iterations (see "Rotation about the X axis of the Lorenz attractor (5000 iterations), computed simultaneously on two different computers"), it appears clearly that the two computers did not give the same results.


(CMAP28 WWW site: this page was created on 03/29/1995 and last updated on 02/08/2022 20:54:25 -CET-)



[See all related pictures (including this one) [Voir toutes les images associées (incluant celle-ci)]]


[Go back to AVirtualMachineForExploringSpaceTimeAndBeyond [Retour à AVirtualMachineForExploringSpaceTimeAndBeyond]]

[The Y2K Bug [Le bug de l'an 2000]]

[Site Map, Help and Search [Plan du Site, Aide et Recherche]]
[Mail [Courrier]]
[About Pictures and Animations [A Propos des Images et des Animations]]


Copyright © Jean-François Colonna, 1995-2022.
Copyright © France Telecom R&D and CMAP (Centre de Mathématiques APpliquées) UMR CNRS 7641 / Ecole Polytechnique, 1995-2022.