Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!cs.utexas.edu!uunet!mcsun!inria!irisa!badouel From: badouel@irisa.irisa.fr (Didier Badouel) Newsgroups: comp.graphics Subject: Re: Raytracer performance on machines? Message-ID: <1505@irisa.irisa.fr> Date: 26 Sep 89 09:56:17 GMT References: <6224@pt.cs.cmu.edu> Organization: IRISA, Rennes (Fr) Lines: 54 In article <6224@pt.cs.cmu.edu>, pkh@vap.vi.ri.cmu.edu (Ping Kang Hsiung) writes: > > Does anyone have a collection of performance (timing) data based > on running a raytracer (preferablly a publicly available raytracer, > e.g. mtv or qrt) on various machines? > We have a parallel raytracer (called PRay) at IRISA which as MTV uses NFF description databases. This raytracer has been implemented on an iPSC/2, on a SEQUENT BALANCE and also on serial computers (SUN3, GOULD NP1) to make better comparisons. I give you the various synthesis times for the well known 'Teapot' database. The image has been renderring with a 512X512 resolution with 3 light sources. Results are as follows : #PEs Time (in sec.) ________________________________________ SUN3: 8877 (~ 2h27mn) ________________________________________ GOULD NP1: 1642 (~ 27mn) ________________________________________ SEQUENT BALANCE 1 37121 (~ 10h18mn) 2 18567 3 12381 4 9285 5 7431 6 6197 7 5311 8 4656 9 4138 (~ 1h9mn) ________________________________________ iPSC/2 1 6294 (~ 1h45mn) 2 3332 4 1700 8 860 16 440 32 224 64 119 (~ 2mn) ________________________________________ The code running on the iPSC/2 emulates a virtual shared memory over the local PEs. The database is not duplicated but all the local memories are used. The remaining memory after loading code and data is used as a cache to speed up low global accesses. ________________________________________________________________ Didier BADOUEL badouel@irisa.fr INRIA / IRISA Phone : +33 99 36 20 00 Campus Universitaire de Beaulieu Fax : 99 38 38 32 35042 RENNES CEDEX - FRANCE Telex : UNIRISA 950 473F ________________________________________________________________