From mlopez@hanse.de Sat Apr 27 01:47:09 1996 Path: ashpoly!cascade!bigsur!hanse!mlopez From: mlopez@hanse.de (Mike López) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr27.014709.5846@hanse.de> Date: Sat, 27 Apr 1996 01:47:09 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. 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? -- === Mike López === Dept of Electrical Engineering, Hanse-Netzwerk Hamburg "Hold for relay." From mgonzalez@clari.net Sun Apr 28 14:16:09 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!mgonzalez From: mgonzalez@clari.net (Mike González) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr28.141609.7174@clari.net> Date: Sun, 28 Apr 1996 14:16:09 GMT References: <1996Apr27.014709.5846@hanse.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Apr27.014709.5846@hanse.de>, mlopez@hanse.de (Mike López) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- Mike González "Hold for relay." PC-9821Ap2 (NEC) / NEXTSTEP 3.3 From bsilva@berkeley.edu Mon Apr 29 08:40:09 1996 Path: ashpoly!cascade!bigsur!berkeley!bsilva From: bsilva@berkeley.edu (Bill Silva) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr29.084009.7439@berkeley.edu> Date: Mon, 29 Apr 1996 08:40:09 GMT References: <1996Apr27.014709.5846@hanse.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Apr27.014709.5846@hanse.de>, mlopez@hanse.de (Mike López) 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. -- === Bill Silva === Dept of Electrical Engineering, UC Berkeley Department of EECS "Hold for relay." From csantos@mindspring.com Tue Apr 30 04:29:09 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!csantos From: csantos@mindspring.com (Callum Santos) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr30.042909.2226@mindspring.com> Date: Tue, 30 Apr 1996 04:29:09 GMT References: <1996Apr27.014709.5846@hanse.de> <1996Apr28.141609.7174@clari.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Apr28.141609.7174@clari.net>, mgonzalez@clari.net (Mike González) 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. -- Callum Santos US Robotics Courier V.34 @ 33,600 bps "Hold for relay." From aschneider@netcom.com Tue Apr 30 09:57:09 1996 Path: ashpoly!cascade!transat!ukc!fennimore!netcom!aschneider From: aschneider@netcom.com (Anton Schneider) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Apr30.095709.3388@netcom.com> Date: Tue, 30 Apr 1996 09:57:09 GMT References: <1996Apr27.014709.5846@hanse.de> <1996Apr29.084009.7439@berkeley.edu> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Apr29.084009.7439@berkeley.edu>, bsilva@berkeley.edu (Bill Silva) 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. -- Anton Schneider -- NETCOM On-Line Communication Services "There are 14 nodes and only 10 countries. Count again."