From anovak@rwth-aachen.de Sat Oct 28 22:01:11 1995 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!anovak From: anovak@rwth-aachen.de (Aiko Novak) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct28.220111.7210@rwth-aachen.de> Date: Sat, 28 Oct 1995 22:01:11 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Anyone running this on a Quadra 840AV with the 68040? -- Aiko Novak | anovak@rwth-aachen.de PGP Key fingerprint: 1FEC A9F7 E654 DAB7 "Keep the channels open." From mkowalski@tum.de Sun Oct 29 03:39:11 1995 Path: ashpoly!cascade!transat!ukc!fennimore!tum!mkowalski From: mkowalski@tum.de (Mikhail Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct29.033911.3449@tum.de> Date: Sun, 29 Oct 1995 03:39:11 GMT References: <1995Oct28.220111.7210@rwth-aachen.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct28.220111.7210@rwth-aachen.de>, anovak@rwth-aachen.de (Aiko Novak) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Mikhail Kowalski | mkowalski@tum.de PGP Key fingerprint: 21AD 9488 3AC0 9416 "Keep the channels open." From treyes@kth.se Sun Oct 29 19:44:11 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!kth!treyes From: treyes@kth.se (Tyler Reyes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct29.194411.4357@kth.se> Date: Sun, 29 Oct 1995 19:44:11 GMT References: <1995Oct28.220111.7210@rwth-aachen.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct28.220111.7210@rwth-aachen.de>, anovak@rwth-aachen.de (Aiko Novak) 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Tyler Reyes Tape trading list upon request. SASE required for international mail. From cjohansson@uu.net Mon Oct 30 13:06:11 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!cjohansson From: cjohansson@uu.net (Callum Johansson) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct30.130611.5298@uu.net> Date: Mon, 30 Oct 1995 13:06:11 GMT References: <1995Oct28.220111.7210@rwth-aachen.de> <1995Oct29.194411.4357@kth.se> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct29.194411.4357@kth.se>, treyes@kth.se (Tyler Reyes) 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. -- Callum Johansson | cjohansson@uu.net PGP Key fingerprint: 9590 F2F8 2A9F 75DF "Keep the channels open." From ntakahashi@berkeley.edu Mon Oct 30 16:13:11 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!ntakahashi From: ntakahashi@berkeley.edu (Nadia Takahashi) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct30.161311.5678@berkeley.edu> Date: Mon, 30 Oct 1995 16:13:11 GMT References: <1995Oct28.220111.7210@rwth-aachen.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Oct28.220111.7210@rwth-aachen.de>, anovak@rwth-aachen.de (Aiko Novak) 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Nadia Takahashi "Hold for relay." Acorn RiscPC 600 / System 7.5.1