Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!mips!hal!mark From: mark@mips.COM (Mark G. Johnson) Newsgroups: comp.benchmarks Subject: Re: Ole Swang's benchmark: Sum of Harmonic Series Message-ID: <44126@mips.mips.COM> Date: 15 Dec 90 18:34:03 GMT References: <44125@mips.mips.COM> Sender: news@mips.COM Reply-To: mark@mips.COM (Mark G. Johnson) Organization: MIPS Computer Systems, Inc. Lines: 26 > >It vectorizes fully on the vectorizing compilers I've tested it on >(Cray and Convex). It has the advantage over the bc benchmark that >it's the same code every time. > >Cray X/MP 216 0.29 >MIPS RC6280 3.3 >MIPS RC3230 Magnum 8.1 >Convex C 120 8.7 <**** full vectorization ??? >Sun SPARCstation II 10.0 >DECstation 5000/200 10.5 >...etc Since the Convex measurement is "surrounded" by little bitty workstations, it might not have been running the fully vectorized object code. Maybe someone can replicate the C-120 measurement above and see what the generated code is doing. 1/2 baked random idea: this pgm performs divide-and-accumulate, so perhaps the machines that have a multiply-accumulate atomic instruction (Apollo DN-10000, Intel i860, IBM RS-6000, etc.) might possibly excel. Or, perhaps not. -- -- Mark Johnson MIPS Computer Systems, 930 E. Arques M/S 2-02, Sunnyvale, CA 94086 (408) 524-8308 mark@mips.com {or ...!decwrl!mips!mark}