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Old 2021-01-04, 15:34   #6
UBR47K
 
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Aug 2015

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Quote:
Originally Posted by PhilF View Post
Are you using Prime95 or mprime? Several of us, including myself, have noticed minor slowdowns like that in mprime, triggered by simply stopping and restarting the program.

So for linux at least, I would suggest that valid time comparisons can be made only if performed after a fresh reboot of the system it's running on.
Using mprime here. You're right, the timings are a bit different after another run.


I'm hitting another issue right now, mprime gets killed by OOM:
Code:
...
[Worker #4 Jan 4 15:24] M1277 curve 1 stage 1 at prime 333859213 [4.39%]. Time: 9.595 sec.
[Worker #1 Jan 4 15:24] Stage 1 complete. 6467614 transforms, 1 modular inverses. Time: 324.497 sec.
[Worker #1 Jan 4 15:24] Optimal B2 is 154*B1 = 38500000.
[Worker #4 Jan 4 15:24] M1277 curve 1 stage 1 at prime 336129743 [4.42%]. Time: 9.594 sec.
[Worker #1 Jan 4 15:24] D: 4620, relative primes: 6955, stage 2 primes: 2325683, pair%=92.66
[Worker #1 Jan 4 15:24] Stage 2 uses 5270MB of memory, 2 FFTs per prime pair, 3-mult modinv pooling, pool size 7693.
[Worker #4 Jan 4 15:24] M1277 curve 1 stage 1 at prime 338402387 [4.45%]. Time: 9.722 sec.
[Worker #1 Jan 4 15:24] Stage 2 init complete. 196757 transforms, 1 modular inverses. Time: 10.625 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 340669547 [4.48%]. Time: 9.713 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 342940799 [4.51%]. Time: 9.674 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 345207923 [4.54%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 347478463 [4.57%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 349751357 [4.60%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 352022999 [4.63%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:25] M1277 curve 1 stage 1 at prime 354290843 [4.66%]. Time: 9.673 sec.
[Worker #4 Jan 4 15:26] M1277 curve 1 stage 1 at prime 356560163 [4.69%]. Time: 9.671 sec.
[Worker #4 Jan 4 15:26] M1277 curve 1 stage 1 at prime 358833499 [4.72%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:26] M1277 curve 1 stage 1 at prime 361107037 [4.75%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:26] M1277 curve 1 stage 1 at prime 363374651 [4.78%]. Time: 9.672 sec.
[Worker #4 Jan 4 15:26] M1277 curve 1 stage 1 at prime 365644387 [4.81%]. Time: 9.671 sec.
[Worker #4 Jan 4 15:26] M1277 curve 1 stage 1 at prime 367912399 [4.84%]. Time: 9.672 sec.
[Worker #1 Jan 4 15:27] Stage 2 complete. 2672527 transforms, 1 modular inverses. Time: 132.611 sec.
[Worker #1 Jan 4 15:27] Stage 2 GCD complete. Time: 0.044 sec.
[Worker #1 Jan 4 15:27] 
[Worker #1 Jan 4 15:27] ECM on M615749: curve #10 with s=8879663910729420, B1=250000, B2=TBD
[Worker #4 Jan 4 15:27] M1277 curve 1 stage 1 at prime 370186381 [4.87%]. Time: 9.653 sec.
[Worker #3 Jan 4 15:27] Stage 1 complete. 6467614 transforms, 1 modular inverses. Time: 356.077 sec.
[Worker #3 Jan 4 15:27] Optimal B2 is 154*B1 = 38500000.
[Worker #3 Jan 4 15:27] D: 4620, relative primes: 6955, stage 2 primes: 2325683, pair%=92.66
[Worker #3 Jan 4 15:27] Stage 2 uses 4921MB of memory, 2 FFTs per prime pair, 3-mult modinv pooling, pool size 7693.
Killed
Specs: i5-4690K, 2x4GB DDR3 RAM

4 Workers, 1 Core each:
Code:
[Worker #1]
ECM2=N/A,1,2,615749,-1,250000,25000000,330

[Worker #2]
ECM2=N/A,1,2,579331,-1,250000,25000000,330

[Worker #3]
ECM2=N/A,1,2,588893,-1,250000,25000000,330

[Worker #4]
ECM2=N/A,1,2,1277,-1,7600000000,7600000000,1
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