Primality test - 0,03% in 105 minutes. It is too much....

[chrow]

When I initiate PRIME95 appears. "Resuming primality test of 33518297".
In the course of time he goes giving the status "Per iteration team: 0.629 sec."
Every 105 minutes he prosecutes 0,03%, in other words, 0,01% every 35 minutes
I did the accounts and saw that were continuing in this ritimo he should carry 243 days. However in the site "http://www.mersenne.org/bench.htm" tells that he should carry 116 days.
I have been accompanying the program, he is running to himself (24 hours a day) in the machine, with MBM5 and with the tasks manager of W2K. In the tasks manager realize that PRIME95 always is using 99% of the CPU.

Can anybody tell because this do it carry so much time? what Can I do to accelerate that???

I apologize by my bad English.

Moises Deangelo
lewris@ig.com.br
ICQ:89529510

[cheesehead]

Originally Posted by chrow

When I initiate PRIME95 appears. "Resuming primality test of 33518297".
In the course of time he goes giving the status "Per iteration team: 0.629 sec."
Every 105 minutes he prosecutes 0,03%, in other words, 0,01% every 35 minutes
I did the accounts and saw that were continuing in this ritimo he should carry 243 days.

33518296 iterations * 0.629 second/iteration = 21,083,000 seconds = about 244 days, which agrees well with 35 minutes * 100 * 100 = 350,000 minutes = 21,000,000 seconds = about 243 days, so that seems like a reasonable time estimate.

However in the site "http://www.mersenne.org/bench.htm" tells that he should carry 116 days.

You have a AMD Duron 1.0GHz, right?

The benchmark page allows selecting CPU Type Athlon, but it doesn't offer a choice of Duron. I guess either:
1) Durons are slower than Athlons, and what would take 116 days for a 1.0GHz Athlon takes 243 days for a 1.0GHz Duron, or
2) the benchmark page calculator's estimate for a 1.0GHz Athlon is too fast.

[Dresdenboy]

The difference between Duron and Athlon is that L2 cache is only 64k (exclusive - so you can add it to the L1 size). And Durons with older core (Morgan) have a 100MHz FSB, the newer ones have 133MHz and even SSE (like Athlon XP).

Prime95 depends heavily on cache size and mem bandwidth. If it's SDR then it would have a serious impact I assume.

Matthias

[chrow]

I understand that in the calculations of the site does not consist DURON, but in the table soon below, FFT 1792K, DURON 950MHZ, RAM 133 (speed), consists 0,426, because is my it so high? 0,628.
In OPTIONS/CPU, the prime95 tells, CPU INFORMATION.
I do not know FSB of the processor, but MATHER BOARD accepted of 100 to 200 MHz.

AMD DURON PROCESSOR
CPU SPEED: 996,18 MHz
CPU FEATURES: RDTSC, CMOV, PREFETCH, MMX, SSE
L1 CACHE SIZE: 64KB
L2 CACHE SIZE: 64KB

Does anybody know to tell if is this delay same correct???

:( :( :(

Moises Deangelo

[hyh1048576]

Maybe you should change your resolution when you do not use your computer(for example,640*480 256colours),it can be 37% faster on my computer when the resolution changes from the highest to the lowest.
See also:http://www.mersenneforum.org/viewtopic.php?t=739