From flopez@berkeley.edu Wed Apr 17 06:37:51 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!berkeley!flopez From: flopez@berkeley.edu (Freya López) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr17.063751.2076@berkeley.edu> Date: Wed, 17 Apr 1996 06:37:51 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 10 Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Anyone running this on a Quadra 840AV with the 68040? -- Freya López -- UC Berkeley Department of EECS "We don't sign stars. We build them." From rpopov@tum.de Thu Apr 18 17:47:51 1996 Path: ashpoly!cascade!brgate!saturno!tum!rpopov From: rpopov@tum.de (Raj Popov) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr18.174751.7997@tum.de> Date: Thu, 18 Apr 1996 17:47:51 GMT References: <1996Apr17.063751.2076@berkeley.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Apr17.063751.2076@berkeley.edu>, flopez@berkeley.edu (Freya López) writes: > Can a 1989 Mac IIci decode a 40-minute LP in reasonable time? Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Raj Popov | rpopov@tum.de PGP Key fingerprint: 78D8 DBAB 2B0E BA6F "Keep the channels open." From mgarcia@hanse.de Sat Apr 20 03:20:51 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!hanse!mgarcia From: mgarcia@hanse.de (Morag García) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr20.032051.5834@hanse.de> Date: Sat, 20 Apr 1996 03:20:51 GMT References: <1996Apr17.063751.2076@berkeley.edu> <1996Apr18.174751.7997@tum.de> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Apr18.174751.7997@tum.de>, rpopov@tum.de (Raj Popov) 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. -- Morag García "Row 14. No joke." Macintosh IIfx / FreeBSD 2.1 From mtanaka@delphi.com Sun Apr 21 00:33:51 1996 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!mtanaka From: mtanaka@delphi.com (Min-jun Tanaka) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr21.003351.9260@delphi.com> Date: Sun, 21 Apr 1996 00:33:51 GMT References: <1996Apr17.063751.2076@berkeley.edu> <1996Apr18.174751.7997@tum.de> <1996Apr20.032051.5834@hanse.de> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Apr20.032051.5834@hanse.de>, mgarcia@hanse.de (Morag García) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Min-jun Tanaka | mtanaka@delphi.com PGP Key fingerprint: 0227 76B6 4DC0 E32A "Keep the channels open." From dlarsson@uu.net Mon Apr 22 03:57:51 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!dlarsson From: dlarsson@uu.net (Diego Larsson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr22.035751.7043@uu.net> Date: Mon, 22 Apr 1996 03:57:51 GMT References: <1996Apr17.063751.2076@berkeley.edu> <1996Apr18.174751.7997@tum.de> <1996Apr20.032051.5834@hanse.de> <1996Apr21.003351.9260@delphi.com> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Apr21.003351.9260@delphi.com>, mtanaka@delphi.com (Min-jun 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Diego Larsson Tape trading list upon request. SASE required for international mail.