From dmoreau@ox.ac.uk Mon Oct 21 18:18:49 1996 Path: ashpoly!cascade!mxgate!coyoacan!ox!dmoreau From: dmoreau@ox.ac.uk (Dong-hyun Moreau) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct21.181849.1184@ox.ac.uk> Date: Mon, 21 Oct 1996 18:18:49 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. 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? -- === Dong-hyun Moreau === Dept of Electrical Engineering, Oxford University Computing Laboratory "When every node is whole, the channel opens." From akim@hanse.de Tue Oct 22 01:26:49 1996 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!akim From: akim@hanse.de (Aiko Kim) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct22.012649.5297@hanse.de> Date: Tue, 22 Oct 1996 01:26:49 GMT References: <1996Oct21.181849.1184@ox.ac.uk> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Oct21.181849.1184@ox.ac.uk>, dmoreau@ox.ac.uk (Dong-hyun Moreau) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Aiko Kim Tape trading list upon request. SASE required for international mail. From gtanaka@kiae.su Wed Oct 23 05:03:49 1996 Path: ashpoly!cascade!transat!ukc!fennimore!kiae!gtanaka From: gtanaka@kiae.su (Graham Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct23.050349.1389@kiae.su> Date: Wed, 23 Oct 1996 05:03:49 GMT References: <1996Oct21.181849.1184@ox.ac.uk> <1996Oct22.012649.5297@hanse.de> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Oct22.012649.5297@hanse.de>, akim@hanse.de (Aiko Kim) 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. -- Graham Tanaka | gtanaka@kiae.su PGP Key fingerprint: A9D8 46F1 7EF8 A576 "Keep the channels open." From hnakamura@u-tokyo.ac.jp Wed Oct 23 07:03:49 1996 Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!hnakamura From: hnakamura@u-tokyo.ac.jp (Hana Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct23.070349.6954@u-tokyo.ac.jp> Date: Wed, 23 Oct 1996 07:03:49 GMT References: <1996Oct21.181849.1184@ox.ac.uk> <1996Oct22.012649.5297@hanse.de> <1996Oct23.050349.1389@kiae.su> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Oct23.050349.1389@kiae.su>, gtanaka@kiae.su (Graham Tanaka) 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. -- Hana Nakamura "Marcus is not one man." Atari TT030 / FreeBSD 2.1 From nivanov@utexas.edu Fri Oct 25 01:11:49 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!utexas!nivanov From: nivanov@utexas.edu (Nadia Ivanov) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct25.011149.6791@utexas.edu> Date: Fri, 25 Oct 1996 01:11:49 GMT References: <1996Oct21.181849.1184@ox.ac.uk> <1996Oct22.012649.5297@hanse.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Oct22.012649.5297@hanse.de>, akim@hanse.de (Aiko Kim) 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. -- === Nadia Ivanov === Dept of Electrical Engineering, University of Texas at Austin "Extraordinary claims require extraordinary spectra."