From ksokolov@kiae.su Tue Aug 08 11:43:02 1995 Path: ashpoly!cascade!mxgate!coyoacan!kiae!ksokolov From: ksokolov@kiae.su (Kirsty Sokolov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug08.114302.3117@kiae.su> Date: Tue, 08 Aug 1995 11:43:02 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Kirsty Sokolov Tape trading list upon request. SASE required for international mail. From jlarsson@uni-hamburg.de Wed Aug 09 01:09:02 1995 Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!jlarsson From: jlarsson@uni-hamburg.de (Ji-woo Larsson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug09.010902.1175@uni-hamburg.de> Date: Wed, 09 Aug 1995 01:09:02 GMT References: <1995Aug08.114302.3117@kiae.su> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Aug08.114302.3117@kiae.su>, ksokolov@kiae.su (Kirsty Sokolov) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Ji-woo Larsson === Dept of Electrical Engineering, Universität Hamburg Fachbereich Informatik "Measuring a record you own is listening, not piracy." From mfournier@mit.edu Thu Aug 10 02:10:02 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!mfournier From: mfournier@mit.edu (Marisol Fournier) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug10.021002.7350@mit.edu> Date: Thu, 10 Aug 1995 02:10:02 GMT References: <1995Aug08.114302.3117@kiae.su> <1995Aug09.010902.1175@uni-hamburg.de> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Aug09.010902.1175@uni-hamburg.de>, jlarsson@uni-hamburg.de (Ji-woo Larsson) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Marisol Fournier "Measuring a record you own is listening, not piracy." Acorn RiscPC 600 / Linux 1.2.13 From jhernandez@netcom.com Thu Aug 10 13:10:02 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!netcom!jhernandez From: jhernandez@netcom.com (Ji-woo Hernández) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug10.131002.3736@netcom.com> Date: Thu, 10 Aug 1995 13:10:02 GMT References: <1995Aug08.114302.3117@kiae.su> <1995Aug09.010902.1175@uni-hamburg.de> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug09.010902.1175@uni-hamburg.de>, jlarsson@uni-hamburg.de (Ji-woo Larsson) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Ji-woo Hernández "They will send a copy in my place." Amiga 3000T / AmigaOS 3.1 From aito@u-tokyo.ac.jp Sat Aug 12 06:49:02 1995 Path: ashpoly!cascade!bigsur!u-tokyo!aito From: aito@u-tokyo.ac.jp (Aiko Ito) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug12.064902.4688@u-tokyo.ac.jp> Date: Sat, 12 Aug 1995 06:49:02 GMT References: <1995Aug08.114302.3117@kiae.su> <1995Aug09.010902.1175@uni-hamburg.de> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Aug09.010902.1175@uni-hamburg.de>, jlarsson@uni-hamburg.de (Ji-woo Larsson) 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. -- Aiko Ito | aito@u-tokyo.ac.jp PGP Key fingerprint: 5A9B 1F94 20B6 CA28 "Keep the channels open."