From mkarlsson@cern.ch Fri Dec 15 06:47:50 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!cern!mkarlsson From: mkarlsson@cern.ch (Marta Karlsson) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec15.064750.1403@cern.ch> Date: Fri, 15 Dec 1995 06:47:50 GMT Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Marta Karlsson *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0 From tschneider@inria.fr Sun Dec 17 01:49:50 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!inria!tschneider From: tschneider@inria.fr (Tyler Schneider) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec17.014950.3521@inria.fr> Date: Sun, 17 Dec 1995 01:49:50 GMT References: <1995Dec15.064750.1403@cern.ch> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Dec15.064750.1403@cern.ch>, mkarlsson@cern.ch (Marta Karlsson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Tyler Schneider US Robotics Courier V.34 @ 28,800 bps "When every node is whole, the channel opens." From vlopez@utexas.edu Mon Dec 18 23:55:50 1995 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!vlopez From: vlopez@utexas.edu (Valeria López) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec18.235550.1873@utexas.edu> Date: Mon, 18 Dec 1995 23:55:50 GMT References: <1995Dec15.064750.1403@cern.ch> <1995Dec17.014950.3521@inria.fr> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Dec17.014950.3521@inria.fr>, tschneider@inria.fr (Tyler Schneider) 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. -- Valeria López Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From vramirez@panix.com Tue Dec 19 19:39:50 1995 Path: ashpoly!cascade!brgate!saturno!panix!vramirez From: vramirez@panix.com (Valeria Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec19.193950.4812@panix.com> Date: Tue, 19 Dec 1995 19:39:50 GMT References: <1995Dec15.064750.1403@cern.ch> <1995Dec17.014950.3521@inria.fr> <1995Dec18.235550.1873@utexas.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Dec18.235550.1873@utexas.edu>, vlopez@utexas.edu (Valeria López) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Top-posters will be placed in my ~/.killfile without notice. -- Valeria Ramírez Tape trading list upon request. SASE required for international mail. From fsuzuki@utexas.edu Wed Dec 20 14:58:50 1995 Path: ashpoly!cascade!transat!ukc!fennimore!utexas!fsuzuki From: fsuzuki@utexas.edu (Freya Suzuki) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Dec20.145850.4481@utexas.edu> Date: Wed, 20 Dec 1995 14:58:50 GMT References: <1995Dec15.064750.1403@cern.ch> <1995Dec17.014950.3521@inria.fr> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Dec17.014950.3521@inria.fr>, tschneider@inria.fr (Tyler Schneider) 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. -- Freya Suzuki -- University of Texas at Austin "Hold for relay."