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| An Interesting Processor Comparison | ||||||||||||||||||||
| October 9th, 2009 at 11:22 PM | ||||||||||||||||||||
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My latest Computer Science assignment involved a large amount of number crunching and text processing, and seeing as how I have a large assortment of computers around my apartment, I figured I'd try them all out and see how they stacked up. The results proved quite surprising. The data I needed to process was a large text file (10680 lines), where each line had a source IP address, a destination IP address, and various network statistics. I wrote two scripts to process this: the first took each IP address, looked it up in a file that mapped IPs to latitude-longitude pairs (816 lines long), and printed lines with the address substituted for the location. The second script took these two locations and calculated the distance on the globe between them. Script #1, for each input line, grep'd the ip-location map twice (once for source, once for dest), and printed the new line with the IPs substituted for locations.Script #2, for each line, ran a perl script that used the Math::Trig module to compute the great circle distance between the locations, and printed the new line with the locations substituted for the distance between them.These scripts were run as a pipeline, so as to take advantage of dual-core processors: The Machines
Yes, that's correct. The Core Duo was more than THREE TIMES SLOWER than the old crusty AthlonXP at this test, despite being able to take full advantage of the parallellized script, being dual-core. For the life of me, I can't figure out why. Both AMD machines are using DDR ram, whereas the Core Duo is using faster DDR2. The Core Duo has 2MB of on-chip cache, the Athlon64 has 1MB, and the AtlonXP only has 256K. It just goes to show how good those AMD processors are. I often rip on that AthlonXP as being the hottest-running chip I've ever seen (it regularly hits 60+ degress Celcius at idle), but it's still plenty good at doing things that matter. |
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