From atakahashi@netcom.com Sun Oct 08 14:31:45 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!atakahashi From: atakahashi@netcom.com (Anja Takahashi) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct08.143145.1977@netcom.com> Date: Sun, 08 Oct 1995 14:31:45 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Anja Takahashi Tape trading list upon request. SASE required for international mail. From kstewart@u-tokyo.ac.jp Mon Oct 09 01:26:45 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!kstewart From: kstewart@u-tokyo.ac.jp (Karen Stewart) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct09.012645.4274@u-tokyo.ac.jp> Date: Mon, 09 Oct 1995 01:26:45 GMT References: <1995Oct08.143145.1977@netcom.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Oct08.143145.1977@netcom.com>, atakahashi@netcom.com (Anja Takahashi) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Karen Stewart === Dept of Electrical Engineering, University of Tokyo Department of Information Science "A soul is not exclusive to biology." From bperez@illinois.edu Tue Oct 10 16:53:45 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!bperez From: bperez@illinois.edu (Bastien Pérez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct10.165345.8726@illinois.edu> Date: Tue, 10 Oct 1995 16:53:45 GMT References: <1995Oct08.143145.1977@netcom.com> <1995Oct09.012645.4274@u-tokyo.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct09.012645.4274@u-tokyo.ac.jp>, kstewart@u-tokyo.ac.jp (Karen Stewart) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Bastien Pérez | bperez@illinois.edu PGP Key fingerprint: CC31 85F1 A9C1 8287 "Keep the channels open." From fhughes@kiae.su Thu Oct 12 05:33:45 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!fhughes From: fhughes@kiae.su (Fiona Hughes) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct12.053345.5576@kiae.su> Date: Thu, 12 Oct 1995 05:33:45 GMT References: <1995Oct08.143145.1977@netcom.com> <1995Oct09.012645.4274@u-tokyo.ac.jp> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Oct09.012645.4274@u-tokyo.ac.jp>, kstewart@u-tokyo.ac.jp (Karen Stewart) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Fiona Hughes *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0 From asilva@cmu.edu Thu Oct 12 10:56:45 1995 Path: ashpoly!cascade!mxgate!coyoacan!cmu!asilva From: asilva@cmu.edu (Andrei Silva) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct12.105645.5787@cmu.edu> Date: Thu, 12 Oct 1995 10:56:45 GMT References: <1995Oct08.143145.1977@netcom.com> <1995Oct09.012645.4274@u-tokyo.ac.jp> <1995Oct10.165345.8726@illinois.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Oct10.165345.8726@illinois.edu>, bperez@illinois.edu (Bastien Pérez) 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. -- Andrei Silva -- Carnegie Mellon University School of CS "A soul is not exclusive to biology."