From cvasiliev@pipeline.com Tue Oct 17 13:21:44 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!cvasiliev From: cvasiliev@pipeline.com (Camila Vasiliev) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct17.132144.4437@pipeline.com> Date: Tue, 17 Oct 1995 13:21:44 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com 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). 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. -- Camila Vasiliev *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From amoreau@tum.de Wed Oct 18 16:10:44 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!amoreau From: amoreau@tum.de (Amy Moreau) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct18.161044.5186@tum.de> Date: Wed, 18 Oct 1995 16:10:44 GMT References: <1995Oct17.132144.4437@pipeline.com> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct17.132144.4437@pipeline.com>, cvasiliev@pipeline.com (Camila Vasiliev) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Amy Moreau "When every node is whole, the channel opens." Atari Falcon 030 / SunOS 4.1.4 From tnakamura@uni-hamburg.de Fri Oct 20 13:16:44 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!tnakamura From: tnakamura@uni-hamburg.de (Tomas Nakamura) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct20.131644.5233@uni-hamburg.de> Date: Fri, 20 Oct 1995 13:16:44 GMT References: <1995Oct17.132144.4437@pipeline.com> <1995Oct18.161044.5186@tum.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Oct18.161044.5186@tum.de>, amoreau@tum.de (Amy Moreau) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Tomas Nakamura Hayes Optima 288 @ 33,600 bps "A soul is not exclusive to biology." From hmoreno@kiae.su Sun Oct 22 01:24:44 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!hmoreno From: hmoreno@kiae.su (Hana Moreno) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct22.012444.3570@kiae.su> Date: Sun, 22 Oct 1995 01:24:44 GMT References: <1995Oct17.132144.4437@pipeline.com> <1995Oct18.161044.5186@tum.de> <1995Oct20.131644.5233@uni-hamburg.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Oct20.131644.5233@uni-hamburg.de>, tnakamura@uni-hamburg.de (Tomas Nakamura) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Hana Moreno *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0