From asantos@berkeley.edu Thu May 19 11:29:43 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!berkeley!asantos From: asantos@berkeley.edu (Anton Santos) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May19.112943.2531@berkeley.edu> Date: Thu, 19 May 1994 11:29:43 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu 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). 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. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Anton Santos Tape trading list upon request. SASE required for international mail. From jeriksson@pacbell.net Fri May 20 01:59:43 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!jeriksson From: jeriksson@pacbell.net (Jens Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May20.015943.7385@pacbell.net> Date: Fri, 20 May 1994 01:59:43 GMT References: <1994May19.112943.2531@berkeley.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994May19.112943.2531@berkeley.edu>, asantos@berkeley.edu (Anton Santos) writes: > 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. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Jens Eriksson Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From dlindqvist@netcom.com Sat May 21 23:36:43 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!dlindqvist From: dlindqvist@netcom.com (Dave Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May21.233643.1527@netcom.com> Date: Sat, 21 May 1994 23:36:43 GMT References: <1994May19.112943.2531@berkeley.edu> <1994May20.015943.7385@pacbell.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994May20.015943.7385@pacbell.net>, jeriksson@pacbell.net (Jens Eriksson) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- === Dave Lindqvist === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Row 14. No joke." From lmoreno@pacbell.net Mon May 23 16:18:43 1994 Path: ashpoly!cascade!brgate!saturno!pacbell!lmoreno From: lmoreno@pacbell.net (Lars Moreno) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May23.161843.7744@pacbell.net> Date: Mon, 23 May 1994 16:18:43 GMT References: <1994May19.112943.2531@berkeley.edu> <1994May20.015943.7385@pacbell.net> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May20.015943.7385@pacbell.net>, jeriksson@pacbell.net (Jens Eriksson) 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. -- Lars Moreno Opinions expressed are solely my own and not those of Pacific Bell Internet Services. ------------------------------------------------------------ From rrobertson@cam.ac.uk Tue May 24 07:01:43 1994 Path: ashpoly!cascade!brgate!saturno!cam!rrobertson From: rrobertson@cam.ac.uk (Rodrigo Robertson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May24.070143.7893@cam.ac.uk> Date: Tue, 24 May 1994 07:01:43 GMT References: <1994May19.112943.2531@berkeley.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994May19.112943.2531@berkeley.edu>, asantos@berkeley.edu (Anton Santos) writes: > 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Rodrigo Robertson SupraFAXModem 28.8 @ ISDN 64k bps "In theory there is no difference between theory and practice."