From ksanchez@u-tokyo.ac.jp Wed May 10 17:00:59 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!ksanchez From: ksanchez@u-tokyo.ac.jp (Karen Sánchez) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May10.170059.4637@u-tokyo.ac.jp> Date: Wed, 10 May 1995 17:00:59 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 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. Anyone running this on a Quadra 840AV with the 68040? -- Karen Sánchez -- University of Tokyo Department of Information Science "There are 14 nodes and only 10 countries. Count again." From fperez@titech.ac.jp Thu May 11 08:40:59 1995 Path: ashpoly!cascade!transat!ukc!fennimore!titech!fperez From: fperez@titech.ac.jp (Fiona Pérez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May11.084059.5744@titech.ac.jp> Date: Thu, 11 May 1995 08:40:59 GMT References: <1995May10.170059.4637@u-tokyo.ac.jp> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: Netscape 1.1N Lines: 9 In article <1995May10.170059.4637@u-tokyo.ac.jp>, ksanchez@u-tokyo.ac.jp (Karen Sánchez) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Fiona Pérez *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From tnakamura@inria.fr Fri May 12 14:19:59 1995 Path: ashpoly!cascade!mxgate!coyoacan!inria!tnakamura From: tnakamura@inria.fr (Tobias Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May12.141959.8040@inria.fr> Date: Fri, 12 May 1995 14:19:59 GMT References: <1995May10.170059.4637@u-tokyo.ac.jp> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 8 In article <1995May10.170059.4637@u-tokyo.ac.jp>, ksanchez@u-tokyo.ac.jp (Karen Sánchez) 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. -- Tobias Nakamura Tape trading list upon request. SASE required for international mail. From bandersson@clari.net Sat May 13 02:06:59 1995 Path: ashpoly!cascade!brgate!saturno!clari!bandersson From: bandersson@clari.net (Brian Andersson) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995May13.020659.1571@clari.net> Date: Sat, 13 May 1995 02:06:59 GMT References: <1995May10.170059.4637@u-tokyo.ac.jp> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995May10.170059.4637@u-tokyo.ac.jp>, ksanchez@u-tokyo.ac.jp (Karen Sánchez) 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- === Brian Andersson === Dept of Electrical Engineering, ClariNet Communications Corp "The hatch is open. Is anyone listening?"