From ipopov@panix.com Wed Aug 09 08:10:30 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!ipopov From: ipopov@panix.com (Ines Popov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug09.081030.7684@panix.com> Date: Wed, 09 Aug 1995 08:10:30 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 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. 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! -- Ines Popov | ipopov@panix.com PGP Key fingerprint: 3258 0CA6 4BA1 2F88 "Keep the channels open." From hreyes@purdue.edu Fri Aug 11 09:43:30 1995 Path: ashpoly!cascade!brgate!saturno!purdue!hreyes From: hreyes@purdue.edu (Hana Reyes) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug11.094330.8507@purdue.edu> Date: Fri, 11 Aug 1995 09:43:30 GMT References: <1995Aug09.081030.7684@panix.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug09.081030.7684@panix.com>, ipopov@panix.com (Ines Popov) 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. -- Hana Reyes | hreyes@purdue.edu PGP Key fingerprint: 9175 0921 F322 D4F6 "Keep the channels open." From srobertson@panix.com Sat Aug 12 12:45:30 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!srobertson From: srobertson@panix.com (Sergei Robertson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug12.124530.1513@panix.com> Date: Sat, 12 Aug 1995 12:45:30 GMT References: <1995Aug09.081030.7684@panix.com> <1995Aug11.094330.8507@purdue.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Aug11.094330.8507@purdue.edu>, hreyes@purdue.edu (Hana Reyes) 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. PGP Public key available via finger or upon request. -- Sergei Robertson "Extraordinary claims require extraordinary spectra." Sun 3/60 (SunOS 4.1.1) / TOS 4.04 From mgirard@u-tokyo.ac.jp Mon Aug 14 11:19:30 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!u-tokyo!mgirard From: mgirard@u-tokyo.ac.jp (Morag Girard) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Aug14.111930.6292@u-tokyo.ac.jp> Date: Mon, 14 Aug 1995 11:19:30 GMT References: <1995Aug09.081030.7684@panix.com> <1995Aug11.094330.8507@purdue.edu> <1995Aug12.124530.1513@panix.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Aug12.124530.1513@panix.com>, srobertson@panix.com (Sergei Robertson) 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. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- === Morag Girard === Dept of Electrical Engineering, University of Tokyo Department of Information Science "5 sigma is a discovery. 7 is a question."