From knilsson@mindspring.com Sun Jan 07 01:06:16 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!knilsson From: knilsson@mindspring.com (Karen Nilsson) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan07.010616.6997@mindspring.com> Date: Sun, 07 Jan 1996 01:06:16 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 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. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- === Karen Nilsson === Dept of Electrical Engineering, MindSpring Enterprises "Do not worship the copy." From jlindqvist@kth.se Mon Jan 08 04:37:16 1996 Path: ashpoly!cascade!transat!ukc!fennimore!kth!jlindqvist From: jlindqvist@kth.se (Joachim Lindqvist) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan08.043716.3574@kth.se> Date: Mon, 08 Jan 1996 04:37:16 GMT References: <1996Jan07.010616.6997@mindspring.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jan07.010616.6997@mindspring.com>, knilsson@mindspring.com (Karen Nilsson) 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. -- Joachim Lindqvist *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From bgarcia@pipeline.com Mon Jan 08 07:40:16 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!pipeline!bgarcia From: bgarcia@pipeline.com (Bruno García) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan08.074016.5621@pipeline.com> Date: Mon, 08 Jan 1996 07:40:16 GMT References: <1996Jan07.010616.6997@mindspring.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 12 In article <1996Jan07.010616.6997@mindspring.com>, knilsson@mindspring.com (Karen Nilsson) 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- === Bruno García === Dept of Electrical Engineering, The Pipeline Internet Network "Hardware is temporary. The signal survives." From bokonkwo@ox.ac.uk Tue Jan 09 01:58:16 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!bokonkwo From: bokonkwo@ox.ac.uk (Bill Okonkwo) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan09.015816.6428@ox.ac.uk> Date: Tue, 09 Jan 1996 01:58:16 GMT References: <1996Jan07.010616.6997@mindspring.com> <1996Jan08.043716.3574@kth.se> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jan08.043716.3574@kth.se>, jlindqvist@kth.se (Joachim Lindqvist) 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. -- Bill Okonkwo | bokonkwo@ox.ac.uk PGP Key fingerprint: 3FD8 8B42 F20C EC06 "Keep the channels open." From ypark@uni-hamburg.de Thu Jan 11 03:23:16 1996 Path: ashpoly!cascade!bigsur!uni-hamburg!ypark From: ypark@uni-hamburg.de (Yuki Park) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jan11.032316.7944@uni-hamburg.de> Date: Thu, 11 Jan 1996 03:23:16 GMT References: <1996Jan07.010616.6997@mindspring.com> <1996Jan08.074016.5621@pipeline.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Jan08.074016.5621@pipeline.com>, bgarcia@pipeline.com (Bruno García) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. > Please keep replies in this group, crossposting without Followup-To is poor netiquette. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Yuki Park "In theory there is no difference between theory and practice." Decstation 5000/200 / TOS 4.04