From agonzalez@mit.edu Thu Aug 25 00:07:47 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!mit!agonzalez From: agonzalez@mit.edu (Astrid González) Newsgroups: comp.sys.m68k Subject: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug25.000747.9121@mit.edu> Date: Thu, 25 Aug 1994 00:07:47 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Anyone running this on a Quadra 840AV with the 68040? -- Astrid González | agonzalez@mit.edu PGP Key fingerprint: 6085 B02E AF6B E21A "Keep the channels open." From nbrennan@illinois.edu Thu Aug 25 14:12:47 1994 Path: ashpoly!cascade!mxgate!coyoacan!illinois!nbrennan From: nbrennan@illinois.edu (Natalia Brennan) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug25.141247.9378@illinois.edu> Date: Thu, 25 Aug 1994 14:12:47 GMT References: <1994Aug25.000747.9121@mit.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Aug25.000747.9121@mit.edu>, agonzalez@mit.edu (Astrid González) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Natalia Brennan Opinions expressed are solely my own and not those of University of Illinois Urbana-Champaign. ------------------------------------------------------------ From djohansson@cam.ac.uk Fri Aug 26 03:12:47 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!djohansson From: djohansson@cam.ac.uk (Diego Johansson) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug26.031247.4752@cam.ac.uk> Date: Fri, 26 Aug 1994 03:12:47 GMT References: <1994Aug25.000747.9121@mit.edu> <1994Aug25.141247.9378@illinois.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug25.141247.9378@illinois.edu>, nbrennan@illinois.edu (Natalia Brennan) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Diego Johansson *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From rvasiliev@netcom.com Sat Aug 27 16:27:47 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!rvasiliev From: rvasiliev@netcom.com (Renata Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: [FLAME] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Aug27.162747.4282@netcom.com> Date: Sat, 27 Aug 1994 16:27:47 GMT References: <1994Aug25.000747.9121@mit.edu> <1994Aug25.141247.9378@illinois.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Aug25.141247.9378@illinois.edu>, nbrennan@illinois.edu (Natalia Brennan) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Renata Vasiliev Tape trading list upon request. SASE required for international mail.