Thread: Quad Quad-cores
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Old 2008-03-24, 20:43   #8
SlashDude
 
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Aug 2002
Minneapolis, MN

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Quote:
Originally Posted by lpmurray View Post
Would you or anyone with a 4 core, consider trying a 100 million number running on 4 cores of a single processor using 25.x and seeing how long it takes to finish a number? On my duel Pentium Xeon 2.4GHz says it will take 17 years. I am thinking of up-grading to a duel 4 core Intel Processor motherboard. Plus my front buss is single channel 533MHz I think 1333MHz duel channel should make a big difference. My iteration time is 1.070sec.
Here is a run from 1 to 16 cores on a 100 million number:

Single test: M73006597 (CPU Affinity set to run on first CPU - Each addition thread took the CPU's in order - 0,1,2,3,4,5...) (Hopefully I got the math correct on “Days”)
Code:
HP DL580 G5 (2.4GHz 1066 FSB)
Cores  Iteration   Box%  Days
16     .030 sec    57%   25.35
15     .031 sec    54%   26.19
14     .031 sec    50%   26.19
13     .031 sec    60%   26.19
12     .031 sec    55%   26.19
11     .032 sec    47%   27.04
10     .032 sec    43%   27.04
9      .034 sec    40%   28.73
8      .034 sec    41%   28.73
7      .037 sec    36%   31.26
6      .040 sec    32%   33.80
5      .047 sec    27%   39.71
4      .048 sec    24%   40.56
3      .056 sec    18%   47.32
2      .061 sec    13%   51.54
1      .109 sec     7%    92.10
Code:
IBM 3850 M2 (2.98GHz, 1333 FSB)
16     .031 sec    52%   26.19
15     .032 sec    48%   27.04
14     .032 sec    43%   27.04
13     .032 sec    43%   27.04
12     .032 sec    41%   27.04
11     .033 sec    41%   27.88
10     .034 sec    40%   28.73
9      .036 sec    47%   30.42
8      .036 sec    46%   30.42
7      .034 sec    36%   28.73
6      .036 sec    32%   30.42
5      .043 sec    27%   36.33
4      .050 sec    22%   42.25
3      .065 sec    18%   54.92
2      .055 sec    13%   46.47
1      .098 sec     7%    82.81
-SD
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