From rperez@uni-hamburg.de Thu Jan 19 13:59:07 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!rperez From: rperez@uni-hamburg.de (Rodrigo Pérez) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan19.135907.5856@uni-hamburg.de> Date: Thu, 19 Jan 1995 13:59:07 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 10 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- Rodrigo Pérez -- Universität Hamburg Fachbereich Informatik "Measuring a record you own is listening, not piracy." From gnilsson@earthlink.net Sat Jan 21 04:35:07 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!gnilsson From: gnilsson@earthlink.net (Graham Nilsson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan21.043507.7996@earthlink.net> Date: Sat, 21 Jan 1995 04:35:07 GMT References: <1995Jan19.135907.5856@uni-hamburg.de> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jan19.135907.5856@uni-hamburg.de>, rperez@uni-hamburg.de (Rodrigo Pérez) 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. -- Graham Nilsson Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From jlindqvist@earthlink.net Sun Jan 22 21:01:07 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!jlindqvist From: jlindqvist@earthlink.net (Jen Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan22.210107.8923@earthlink.net> Date: Sun, 22 Jan 1995 21:01:07 GMT References: <1995Jan19.135907.5856@uni-hamburg.de> <1995Jan21.043507.7996@earthlink.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan21.043507.7996@earthlink.net>, gnilsson@earthlink.net (Graham Nilsson) 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. -- Jen Lindqvist | jlindqvist@earthlink.net PGP Key fingerprint: F811 49D0 9716 6CDA "Keep the channels open." From tsanchez@ox.ac.uk Tue Jan 24 10:16:07 1995 Path: ashpoly!cascade!bigsur!ox!tsanchez From: tsanchez@ox.ac.uk (Tyler Sánchez) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan24.101607.8073@ox.ac.uk> Date: Tue, 24 Jan 1995 10:16:07 GMT References: <1995Jan19.135907.5856@uni-hamburg.de> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan19.135907.5856@uni-hamburg.de>, rperez@uni-hamburg.de (Rodrigo Pérez) 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. -- === Tyler Sánchez === Dept of Electrical Engineering, Oxford University Computing Laboratory "Hold for relay." From oito@uu.net Thu Jan 26 00:57:07 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!uu!oito From: oito@uu.net (Olga Ito) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Jan26.005707.5294@uu.net> Date: Thu, 26 Jan 1995 00:57:07 GMT References: <1995Jan19.135907.5856@uni-hamburg.de> <1995Jan21.043507.7996@earthlink.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jan21.043507.7996@earthlink.net>, gnilsson@earthlink.net (Graham Nilsson) 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. -- Olga Ito "When every node is whole, the channel opens." Commodore Amiga 500 (1MB OCS) / System 7.5.1