From akuznetsov@demon.co.uk Mon Jan 23 16:53:04 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!akuznetsov From: akuznetsov@demon.co.uk (Andrei Kuznetsov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan23.165304.3130@demon.co.uk> Date: Mon, 23 Jan 1995 16:53:04 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Andrei Kuznetsov Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------ From mjohansson@u-tokyo.ac.jp Wed Jan 25 03:29:04 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!mjohansson From: mjohansson@u-tokyo.ac.jp (Matthias Johansson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan25.032904.3350@u-tokyo.ac.jp> Date: Wed, 25 Jan 1995 03:29:04 GMT References: <1995Jan23.165304.3130@demon.co.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Jan23.165304.3130@demon.co.uk>, akuznetsov@demon.co.uk (Andrei Kuznetsov) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- === Matthias Johansson === Dept of Electrical Engineering, University of Tokyo Department of Information Science "Hold for relay." From htanaka@panix.com Wed Jan 25 18:06:04 1995 Path: ashpoly!cascade!mxgate!coyoacan!panix!htanaka From: htanaka@panix.com (Hana Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan25.180604.6102@panix.com> Date: Wed, 25 Jan 1995 18:06:04 GMT References: <1995Jan23.165304.3130@demon.co.uk> <1995Jan25.032904.3350@u-tokyo.ac.jp> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Jan25.032904.3350@u-tokyo.ac.jp>, mjohansson@u-tokyo.ac.jp (Matthias Johansson) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Hana Tanaka Tape trading list upon request. SASE required for international mail. From fpetrov@delphi.com Fri Jan 27 10:59:04 1995 Path: ashpoly!cascade!bigsur!delphi!fpetrov From: fpetrov@delphi.com (Fiona Petrov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan27.105904.7883@delphi.com> Date: Fri, 27 Jan 1995 10:59:04 GMT References: <1995Jan23.165304.3130@demon.co.uk> <1995Jan25.032904.3350@u-tokyo.ac.jp> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan25.032904.3350@u-tokyo.ac.jp>, mjohansson@u-tokyo.ac.jp (Matthias Johansson) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Fiona Petrov === Dept of Electrical Engineering, Delphi Internet Services "When every node is whole, the channel opens." From ebrennan@delphi.com Sat Jan 28 05:07:04 1995 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!ebrennan From: ebrennan@delphi.com (Elaine Brennan) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan28.050704.4480@delphi.com> Date: Sat, 28 Jan 1995 05:07:04 GMT References: <1995Jan23.165304.3130@demon.co.uk> <1995Jan25.032904.3350@u-tokyo.ac.jp> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan25.032904.3350@u-tokyo.ac.jp>, mjohansson@u-tokyo.ac.jp (Matthias Johansson) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Elaine Brennan "Hardware is temporary. The signal survives." Acorn RiscPC 600 / FreeBSD 2.1