From bsilva@kth.se Mon Apr 03 20:04:42 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!bsilva From: bsilva@kth.se (Bruno Silva) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr03.200442.7198@kth.se> Date: Mon, 03 Apr 1995 20:04:42 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Bruno Silva "We don't sign stars. We build them." PC-9821Ap2 (NEC) / SunOS 4.1.4 From sgarcia@earthlink.net Wed Apr 05 10:32:42 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!sgarcia From: sgarcia@earthlink.net (Sven García) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr05.103242.9807@earthlink.net> Date: Wed, 05 Apr 1995 10:32:42 GMT References: <1995Apr03.200442.7198@kth.se> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Apr03.200442.7198@kth.se>, bsilva@kth.se (Bruno Silva) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Sven García === Dept of Electrical Engineering, EarthLink Network "There are 14 nodes and only 10 countries. Count again." From kjohansson@titech.ac.jp Thu Apr 06 21:37:42 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!kjohansson From: kjohansson@titech.ac.jp (Kirsty Johansson) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr06.213742.3229@titech.ac.jp> Date: Thu, 06 Apr 1995 21:37:42 GMT References: <1995Apr03.200442.7198@kth.se> <1995Apr05.103242.9807@earthlink.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr05.103242.9807@earthlink.net>, sgarcia@earthlink.net (Sven García) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Kirsty Johansson | kjohansson@titech.ac.jp PGP Key fingerprint: 717A 82C2 67D3 F862 "Keep the channels open." From ehughes@illinois.edu Fri Apr 07 14:38:42 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!ehughes From: ehughes@illinois.edu (Élodie Hughes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr07.143842.8969@illinois.edu> Date: Fri, 07 Apr 1995 14:38:42 GMT References: <1995Apr03.200442.7198@kth.se> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Apr03.200442.7198@kth.se>, bsilva@kth.se (Bruno Silva) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- === Élodie Hughes === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "5 sigma is a discovery. 7 is a question."