Threads and Cores

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xlsior
 #1
The application closes right after it is finished... too fast for me to see the threaded result.


Launch it in a DOS box, and the results will remain on the screen.

My results, on a Core 2 Duo E6600 (2.4GHz):

pi = 3.1415926535921401
count = 1000000000
time = 15528
threaded....
pi = 3.1415926535898211
count = 1000000000
time = 12735

So slightly faster, but not by much. :-?
and it looks like whatever calculations are happening here is much faster on the AMD, looking at the results for the 4200+ mentioned above.

Something a bit odd:

If I open the task manager and view the CPU usage history, it's next to nothing before running the program. then in single-threaded mode, XP shows about 50% usage on both cores rather than the expected 100% usage on a single core.
Once the second stage kicks in, both cores go to 100%.