I my last post I forgot to list the motherboard. Please delete it and use
this instead. Sorry.
---Here are some results for the a 1 GHz Athlon w/DDR SDRAM. ----------------------------------------------------- Computer: Micron Millenia MAX XP CPU: 1 GHz AMD Athlon/Thunderbird Cache: 256 kb Motherboard: Gigabyte GA-7DX Chipset: AMD 761 Memory: 128 MB 200 MHz DDR SDRAM (1 out of 2 sockets populated) OS: Red Hat Linux 7.0 ----------------------- compiler: g77 version 2.96 compiler options: -O3
---------------------------------------------- Double precision appears to have 16 digits of accuracy Assuming 8 bytes per DOUBLE PRECISION word ---------------------------------------------- Array size = 2000000 Offset = 0 The total memory requirement is 45 MB You are running each test 10 times -- The *best* time for each test is used *EXCLUDING* the first and last iterations ---------------------------------------------------- Your clock granularity/precision appears to be 10000 microseconds ---------------------------------------------------- Function Rate (MB/s) Avg time Min time Max time Copy: 533.3338 0.0625 0.0600 0.0700 Scale: 640.0006 0.0537 0.0500 0.0600 Add: 600.0006 0.0837 0.0800 0.0900 Triad: 685.7144 0.0775 0.0700 0.0800
---------------------------------------------------- Solution Validates! ----------------------------------------------------
========================================================================== compiler: Lahey F95 version 5.5 options -O --tpp --staticlink (note that compilation gives several workings like: /tmp/asm24623aaa.s:3048: Warning: translating to `fld %st' /tmp/asm24623aaa.s:3166: Warning: translating to `fstp %st'
---------------------------------------------- Double precision appears to have 16 digits of accuracy Assuming 8 bytes per DOUBLE PRECISION word ---------------------------------------------- Array size = 2000000 Offset = 0 The total memory requirement is 45 MB You are running each test 10 times -- The *best* time for each test is used *EXCLUDING* the first and last iterations ---------------------------------------------------- Your clock granularity/precision appears to be 10000 microseconds ---------------------------------------------------- Function Rate (MB/s) Avg time Min time Max time Copy: 533.3338 0.0600 0.0600 0.0600 Scale: 800.0008 0.0475 0.0400 0.0500 Add: 800.0008 0.0625 0.0600 0.0700 Triad: 800.0008 0.0688 0.0600 0.0700 ---------------------------------------------------- Solution Validates! ----------------------------------------------------
======================================================================= Eric C. Frey Phone: 919-966-6729; Fax: 919-966-2963; Assistant Professor e-mail: frey@bme.unc.edu Department of Biomedical Engineering and Department of Radiology The University of North Carolina 148 MacNider Hall, CB 7575, Chapel Hill, NC 27599
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