From cnilsson@pacbell.net Wed Oct 11 02:06:03 1995 Path: ashpoly!cascade!brgate!saturno!pacbell!cnilsson From: cnilsson@pacbell.net (Callum Nilsson) Newsgroups: comp.sys.m68k Subject: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct11.020603.9592@pacbell.net> Date: Wed, 11 Oct 1995 02:06:03 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: Netscape 1.1N Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. -- Callum Nilsson "In theory there is no difference between theory and practice." Pentium 90 (OS/2 Warp) / NEXTSTEP 3.3 From mweber@utexas.edu Thu Oct 12 22:16:03 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!utexas!mweber From: mweber@utexas.edu (Mateo Weber) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct12.221603.2308@utexas.edu> Date: Thu, 12 Oct 1995 22:16:03 GMT References: <1995Oct11.020603.9592@pacbell.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Oct11.020603.9592@pacbell.net>, cnilsson@pacbell.net (Callum Nilsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > 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. -- Mateo Weber Hayes Optima 288 @ 28,800 bps "There are 14 nodes and only 10 countries. Count again." From lkowalski@pipeline.com Fri Oct 13 03:11:03 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!pipeline!lkowalski From: lkowalski@pipeline.com (Lucia Kowalski) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct13.031103.3172@pipeline.com> Date: Fri, 13 Oct 1995 03:11:03 GMT References: <1995Oct11.020603.9592@pacbell.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct11.020603.9592@pacbell.net>, cnilsson@pacbell.net (Callum Nilsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Lucia Kowalski | lkowalski@pipeline.com PGP Key fingerprint: 1EAB 25E5 A262 2DC5 "Keep the channels open." From mkang@cam.ac.uk Sat Oct 14 17:08:03 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cam!mkang From: mkang@cam.ac.uk (Mateo Kang) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct14.170803.5597@cam.ac.uk> Date: Sat, 14 Oct 1995 17:08:03 GMT References: <1995Oct11.020603.9592@pacbell.net> <1995Oct12.221603.2308@utexas.edu> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct12.221603.2308@utexas.edu>, mweber@utexas.edu (Mateo Weber) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Mateo Kang *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From dvasiliev@titech.ac.jp Sun Oct 15 03:48:03 1995 Path: ashpoly!cascade!transat!ukc!fennimore!titech!dvasiliev From: dvasiliev@titech.ac.jp (Dmitri Vasiliev) Newsgroups: comp.sys.m68k Subject: Re: WTB/WTT: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct15.034803.5170@titech.ac.jp> Date: Sun, 15 Oct 1995 03:48:03 GMT References: <1995Oct11.020603.9592@pacbell.net> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Oct11.020603.9592@pacbell.net>, cnilsson@pacbell.net (Callum Nilsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Dmitri Vasiliev "Extraordinary claims require extraordinary spectra." Sun SparcStation 20 / System 7.5.1