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Old 2004-05-14, 11:47   #1
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Red face iteration time under XP

On my PC in the beginning the iteration time was 0.055 but, I don't understand why, the iteration time rise to 0.155.


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Old 2004-05-14, 12:30   #2
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Have you logged in and out different users on the machine with out shutting down? I have had this cause it to slow down on an NT machine. Also check and see what else is running, maybe something new is running.
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Old 2004-05-14, 12:51   #3
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Have a look in your task manager and see what is taking up the cpu time. Also, just to make sure, these times were both with the same exponent? A higher exponent in a different fft range could account for the time difference per iteration.
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Old 2004-05-14, 14:47   #4
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Quote:
Originally Posted by dave_0273
Have a look in your task manager and see what is taking up the cpu time. Also, just to make sure, these times were both with the same exponent? A higher exponent in a different fft range could account for the time difference per iteration.
Finally, if you have a Pentium 4, you may disable the "throttle" of the processor...

Luigi
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Old 2004-05-14, 18:21   #5
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Quote:
Originally Posted by Uncwilly
Have you logged in and out different users on the machine with out shutting down? I have had this cause it to slow down on an NT machine. Also check and see what else is running, maybe something new is running.
I never use other user different from mine.

I check on the task manager and prime 95 had a cpu usage of more than 95%.

thank you for your reply

maurizio
 
Old 2004-05-14, 18:36   #6
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Quote:
Originally Posted by ET_
Finally, if you have a Pentium 4, you may disable the "throttle" of the processor...

Luigi
how i can disable the throttle?

thank you

maurizio
 
Old 2004-05-14, 18:39   #7
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Quote:
Originally Posted by dave_0273
Have a look in your task manager and see what is taking up the cpu time. Also, just to make sure, these times were both with the same exponent? A higher exponent in a different fft range could account for the time difference per iteration.
cpu time is more than 95 %.

The iteration time was increased while performing the test of one exponent

thank you

maurizio
 
Old 2004-05-14, 20:30   #8
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Quote:
Originally Posted by Unregistered
prime 95 had a cpu usage of more than 95%.
While nothing else is active, it should show 99%.
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Old 2004-05-16, 08:48   #9
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Quote:
Originally Posted by Unregistered
On my PC in the beginning the iteration time was 0.055 but, I don't understand why, the iteration time rise to 0.155.
If you post the type of machine, CPU speed, and what exponent you are testing (or at least its FFT size) then someone can work out what iteration time to expect.
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Old 2004-05-16, 08:51   #10
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Maybe 0.055 was during factoring or P-1...
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Old 2004-05-16, 11:08   #11
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Quote:
Originally Posted by MrHappy
Maybe 0.055 was during factoring or P-1...
Possible during trial factoring, but it wouldn't be during p-1 as p-1 does not give a per itteration time. It just gives the total time taken.
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