Author: Matt Taylor
Date: 03:48:03 12/19/02
Athlon data: http://65.186.75.165/~mtaylor/bitscan_athlon.html I'll try to post source a little later on today. I have a 3-hr. drive ahead of me, and I should arrive at my destination around 10-10:30 AM my time (EST). Hopefully 11 AM-12 PM EST when it gets posted, but it could easily be 3 PM EST if I have to clean up more code than I thought. I'll stick a link in the HTML file. Obviously I have a few timing issues left unresolved. One such issue involves interrupts in the middle of a timed routine. (You will notice the occasional test skyrocketing by a few thousand clocks.) For most of the other timings, the average (computed over 128 trials) is equal to the min. or max., usually the former. That indicates that the first time in, the function has some extra latency. I'm warming the cache, so I'm not sure why this is happening. If anyone wants to make suggestions for the code, I'd love to take them. Keep in mind that this code is a hacked/adapted version of code I was using to test IPC and processor efficiency. -Matt
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