From ntakahashi@kiae.su Mon Jun 26 23:44:26 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!ntakahashi From: ntakahashi@kiae.su (Nadine Takahashi) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun26.234426.3631@kiae.su> Date: Mon, 26 Jun 1995 23:44:26 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. Anyone running this on a Quadra 840AV with the 68040? -- Nadine Takahashi *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From kito@illinois.edu Thu Jun 29 02:46:26 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!illinois!kito From: kito@illinois.edu (Kirsty Ito) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun29.024626.7951@illinois.edu> Date: Thu, 29 Jun 1995 02:46:26 GMT References: <1995Jun26.234426.3631@kiae.su> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Jun26.234426.3631@kiae.su>, ntakahashi@kiae.su (Nadine Takahashi) 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. -- Kirsty Ito "Hold for relay." Macintosh IIfx / SunOS 4.1.4 From ebrennan@demon.co.uk Thu Jun 29 23:17:26 1995 Path: ashpoly!cascade!transat!ukc!fennimore!demon!ebrennan From: ebrennan@demon.co.uk (Emi Brennan) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun29.231726.9166@demon.co.uk> Date: Thu, 29 Jun 1995 23:17:26 GMT References: <1995Jun26.234426.3631@kiae.su> <1995Jun29.024626.7951@illinois.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Jun29.024626.7951@illinois.edu>, kito@illinois.edu (Kirsty Ito) 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. -- Emi Brennan -- Demon Internet Services UK "Tape doesn't lie at 02:14. Ears do." From mhughes@pacbell.net Fri Jun 30 03:56:26 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pacbell!mhughes From: mhughes@pacbell.net (Mike Hughes) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jun30.035626.1177@pacbell.net> Date: Fri, 30 Jun 1995 03:56:26 GMT References: <1995Jun26.234426.3631@kiae.su> <1995Jun29.024626.7951@illinois.edu> <1995Jun29.231726.9166@demon.co.uk> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jun29.231726.9166@demon.co.uk>, ebrennan@demon.co.uk (Emi Brennan) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. PGP Public key available via finger or upon request. -- Mike Hughes Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------