From jokonkwo@ox.ac.uk Thu May 12 22:14:22 1994 Path: ashpoly!cascade!bigsur!ox!jokonkwo From: jokonkwo@ox.ac.uk (Ji-woo Okonkwo) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May12.221422.5165@ox.ac.uk> Date: Thu, 12 May 1994 22:14:22 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 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. Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes. Anyone running this on a Quadra 840AV with the 68040? -- Ji-woo Okonkwo *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From jsokolov@kth.se Sat May 14 23:41:22 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!kth!jsokolov From: jsokolov@kth.se (Joachim Sokolov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May14.234122.6748@kth.se> Date: Sat, 14 May 1994 23:41:22 GMT References: <1994May12.221422.5165@ox.ac.uk> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994May12.221422.5165@ox.ac.uk>, jokonkwo@ox.ac.uk (Ji-woo Okonkwo) writes: > 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. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Joachim Sokolov "We don't sign stars. We build them." 486DX2/66 (Linux 1.2.13) / SunOS 4.1.4 From ltanaka@tum.de Tue May 17 03:01:22 1994 Path: ashpoly!cascade!mxgate!coyoacan!tum!ltanaka From: ltanaka@tum.de (Lucia Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May17.030122.4350@tum.de> Date: Tue, 17 May 1994 03:01:22 GMT References: <1994May12.221422.5165@ox.ac.uk> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May12.221422.5165@ox.ac.uk>, jokonkwo@ox.ac.uk (Ji-woo Okonkwo) 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. -- Lucia Tanaka US Robotics Courier V.34 @ 28,800 bps "Row 14. No joke." From jnovak@panix.com Wed May 18 20:02:22 1994 Path: ashpoly!cascade!mxgate!coyoacan!panix!jnovak From: jnovak@panix.com (Jen Novak) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May18.200222.6668@panix.com> Date: Wed, 18 May 1994 20:02:22 GMT References: <1994May12.221422.5165@ox.ac.uk> <1994May17.030122.4350@tum.de> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May17.030122.4350@tum.de>, ltanaka@tum.de (Lucia Tanaka) 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. -- Jen Novak *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From klaurent@rwth-aachen.de Fri May 20 19:32:22 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!klaurent From: klaurent@rwth-aachen.de (Kenji Laurent) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994May20.193222.4638@rwth-aachen.de> Date: Fri, 20 May 1994 19:32:22 GMT References: <1994May12.221422.5165@ox.ac.uk> <1994May17.030122.4350@tum.de> <1994May18.200222.6668@panix.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May18.200222.6668@panix.com>, jnovak@panix.com (Jen Novak) 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. -- Kenji Laurent "The hatch is open. Is anyone listening?" PC-9821Ap2 (NEC) / SunOS 4.1.4