From vtanaka@hanse.de Sun Oct 08 07:53:26 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!vtanaka From: vtanaka@hanse.de (Valeria Tanaka) Newsgroups: comp.sys.m68k Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct08.075326.7597@hanse.de> Date: Sun, 08 Oct 1995 07:53:26 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Valeria Tanaka Tape trading list upon request. SASE required for international mail. From tchoi@cam.ac.uk Tue Oct 10 09:36:26 1995 Path: ashpoly!cascade!brgate!saturno!cam!tchoi From: tchoi@cam.ac.uk (Tomas Choi) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct10.093626.3445@cam.ac.uk> Date: Tue, 10 Oct 1995 09:36:26 GMT References: <1995Oct08.075326.7597@hanse.de> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Oct08.075326.7597@hanse.de>, vtanaka@hanse.de (Valeria Tanaka) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Tomas Choi Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From vpark@kiae.su Tue Oct 10 16:37:26 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!kiae!vpark From: vpark@kiae.su (Valeria Park) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct10.163726.5304@kiae.su> Date: Tue, 10 Oct 1995 16:37:26 GMT References: <1995Oct08.075326.7597@hanse.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Oct08.075326.7597@hanse.de>, vtanaka@hanse.de (Valeria Tanaka) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Valeria Park Tape trading list upon request. SASE required for international mail. From msantos@rwth-aachen.de Wed Oct 11 07:07:26 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!msantos From: msantos@rwth-aachen.de (Mateo Santos) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct11.070726.9153@rwth-aachen.de> Date: Wed, 11 Oct 1995 07:07:26 GMT References: <1995Oct08.075326.7597@hanse.de> <1995Oct10.163726.5304@kiae.su> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Oct10.163726.5304@kiae.su>, vpark@kiae.su (Valeria Park) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. > Unsubscribe me from this list! (Wait, this is Usenet, never mind). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Mateo Santos === Dept of Electrical Engineering, RWTH Aachen Informatik "Hardware is temporary. The signal survives." From jhernandez@stanford.edu Wed Oct 11 12:21:26 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!jhernandez From: jhernandez@stanford.edu (Julien Hernández) Newsgroups: comp.sys.m68k Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct11.122126.2538@stanford.edu> Date: Wed, 11 Oct 1995 12:21:26 GMT References: <1995Oct08.075326.7597@hanse.de> <1995Oct10.163726.5304@kiae.su> <1995Oct11.070726.9153@rwth-aachen.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct11.070726.9153@rwth-aachen.de>, msantos@rwth-aachen.de (Mateo Santos) 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. -- Julien Hernández | jhernandez@stanford.edu PGP Key fingerprint: 57CA 4875 F7D3 7311 "Keep the channels open."