From jeriksson@utexas.edu Wed Jul 17 13:21:23 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!jeriksson From: jeriksson@utexas.edu (Ji-woo Eriksson) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul17.132123.4956@utexas.edu> Date: Wed, 17 Jul 1996 13:21:23 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: NewsWatcher 2.0b24 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. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Ji-woo Eriksson -- University of Texas at Austin "We don't sign stars. We build them." From gramirez@mit.edu Thu Jul 18 07:13:23 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!mit!gramirez From: gramirez@mit.edu (Göran Ramírez) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul18.071323.5029@mit.edu> Date: Thu, 18 Jul 1996 07:13:23 GMT References: <1996Jul17.132123.4956@utexas.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jul17.132123.4956@utexas.edu>, jeriksson@utexas.edu (Ji-woo Eriksson) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Göran Ramírez "Hardware is temporary. The signal survives." 486DX4/100 (FreeBSD 2.0.5) / NEXTSTEP 3.3 From ghernandez@uu.net Sat Jul 20 06:29:23 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!ghernandez From: ghernandez@uu.net (Göran Hernández) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul20.062923.4358@uu.net> Date: Sat, 20 Jul 1996 06:29:23 GMT References: <1996Jul17.132123.4956@utexas.edu> <1996Jul18.071323.5029@mit.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jul18.071323.5029@mit.edu>, gramirez@mit.edu (Göran Ramírez) writes: > The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Göran Hernández "Do not worship the copy." Atari TT030 / System 7.5.1 From dtanaka@stanford.edu Sat Jul 20 17:36:23 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!dtanaka From: dtanaka@stanford.edu (Dmitri Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jul20.173623.3962@stanford.edu> Date: Sat, 20 Jul 1996 17:36:23 GMT References: <1996Jul17.132123.4956@utexas.edu> <1996Jul18.071323.5029@mit.edu> <1996Jul20.062923.4358@uu.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jul20.062923.4358@uu.net>, ghernandez@uu.net (Göran Hernández) 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. -- === Dmitri Tanaka === Dept of Electrical Engineering, Stanford University Computer Systems Lab "When every node is whole, the channel opens."