From tcampbell@berkeley.edu Thu Sep 12 21:06:56 1996 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!tcampbell From: tcampbell@berkeley.edu (Thiago Campbell) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep12.210656.3270@berkeley.edu> Date: Thu, 12 Sep 1996 21:06:56 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 11 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Thiago Campbell Zyxel U-1496E @ ISDN 64k bps "Tape doesn't lie at 02:14. Ears do." From knovak@cam.ac.uk Fri Sep 13 18:35:56 1996 Path: ashpoly!cascade!bigsur!cam!knovak From: knovak@cam.ac.uk (Kirsty Novak) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep13.183556.1109@cam.ac.uk> Date: Fri, 13 Sep 1996 18:35:56 GMT References: <1996Sep12.210656.3270@berkeley.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Sep12.210656.3270@berkeley.edu>, tcampbell@berkeley.edu (Thiago Campbell) 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. -- Kirsty Novak | knovak@cam.ac.uk PGP Key fingerprint: AB14 C5B0 47D0 EDF6 "Keep the channels open." From dlaurent@cern.ch Sat Sep 14 17:08:56 1996 Path: ashpoly!cascade!brgate!saturno!cern!dlaurent From: dlaurent@cern.ch (Dmitri Laurent) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep14.170856.5102@cern.ch> Date: Sat, 14 Sep 1996 17:08:56 GMT References: <1996Sep12.210656.3270@berkeley.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Sep12.210656.3270@berkeley.edu>, tcampbell@berkeley.edu (Thiago Campbell) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Dmitri Laurent *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From smacdonald@rwth-aachen.de Mon Sep 16 20:02:56 1996 Path: ashpoly!cascade!bigsur!rwth-aachen!smacdonald From: smacdonald@rwth-aachen.de (Sven MacDonald) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep16.200256.3853@rwth-aachen.de> Date: Mon, 16 Sep 1996 20:02:56 GMT References: <1996Sep12.210656.3270@berkeley.edu> <1996Sep13.183556.1109@cam.ac.uk> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Sep13.183556.1109@cam.ac.uk>, knovak@cam.ac.uk (Kirsty Novak) 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. -- Sven MacDonald Practical Peripherals 14.4 @ 14,400 bps "Hardware is temporary. The signal survives." From dpopov@pipeline.com Tue Sep 17 19:19:56 1996 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!dpopov From: dpopov@pipeline.com (Diego Popov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Sep17.191956.9286@pipeline.com> Date: Tue, 17 Sep 1996 19:19:56 GMT References: <1996Sep12.210656.3270@berkeley.edu> <1996Sep14.170856.5102@cern.ch> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1996Sep14.170856.5102@cern.ch>, dlaurent@cern.ch (Dmitri Laurent) 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. -- Diego Popov -- The Pipeline Internet Network "Marcus is not one man."