Prime95 30.8 (big P-1 changes, see post #551) - Page 8

petrw1 · 2021-12-03, 13:38

Quote:

Originally Posted by petrw1

Stage 1 is 10 Mins with AVX512 and 14 Mins with FMA3
Crazy idea ... can I run Stage 1 with AVX512 and Stage 2 with FMA3?
Probably not worth the effort for anyone.
I'll wait for the AVX512 version of 30.8,

28.0M 20GB RAM
600K/273M (Chosen by Prime95)
Stage 1: 14 Mins
Stage 2: 23 Mins

28.0M 20GB RAM
600K/120M (Chosen by me)
Stage 1: 14
Stage 2: 10

28.0M 24GB RAM
600K/120M (Chosen by me)
Stage 1: 14
Stage 2: 10 ... 4 GB not a big diff.

axn · 2021-12-03, 13:55

Quote:

Originally Posted by petrw1

Stage 1 is 10 Mins with AVX512 and 14 Mins with FMA3
Crazy idea ... can I run Stage 1 with AVX512 and Stage 2 with FMA3?
Probably not worth the effort for anyone.

Easily done. Run stage 1 only (B1=B2) in one folder, and stage 2 in another folder after copying over the save files.

axn · 2021-12-03, 13:56

Quote:

Originally Posted by petrw1

28.0M 20GB RAM
600K/273M (Chosen by Prime95)
Stage 1: 14 Mins
Stage 2: 23 Mins

28.0M 20GB RAM
600K/120M (Chosen by me)
Stage 1: 14
Stage 2: 10

28.0M 24GB RAM
600K/120M (Chosen by me)
Stage 1: 14
Stage 2: 10 ... 4 GB not a big diff.

How do the parameter selection (D / poly / memory usage / actual B2) look like for these options?

petrw1 · 2021-12-03, 17:56

Quote:

Originally Posted by axn

How do the parameter selection (D / poly / memory usage / actual B2) look like for these options?

I lost the first option ... scrolled off.
First below uses 24GB
Second uses 20 GB

[Dec 3 00:57]
[Dec 3 00:57] P-1 on M28052377 with B1=600000, B2=120000000
[Dec 3 00:57] Setting affinity to run helper thread 2 on CPU core #3 ... and 6 more of these
[Dec 3 00:57] Using FMA3 FFT length 1536K, Pass1=384, Pass2=4K, clm=2, 8 threads
[Dec 3 01:11] M28052377 stage 1 complete. 1731726 transforms. Total time: 834.494 sec.
[Dec 3 01:11] Round off: 0.06515492749
[Dec 3 01:11] Conversion of stage 1 result complete. 5 transforms, 1 modular inverse. Time: 8.425 sec.
[Dec 3 01:11] Switching to FMA3 FFT length 1680K, Pass1=448, Pass2=3840, clm=2, 8 threads
[Dec 3 01:11] Setting affinity to run helper thread 1 on CPU core #2 ...
[Dec 3 01:11] Using 24827MB of memory. D: 3570, 384x1474 polynomial multiplication.
[Dec 3 01:12] Round off: 0.006904345816, poly_size: 2, EB: 1.04634, SM: 2.39624
[Dec 3 01:12] Round off: 0.0104635992, poly_size: 4
[Dec 3 01:12] Round off: 0.01654535736, poly_size: 8
[Dec 3 01:12] Round off: 0.02423378668, poly_size: 16
[Dec 3 01:12] Round off: 0.04181992679, poly_size: 32
[Dec 3 01:12] Round off: 0.04973827218, poly_size: 64
[Dec 3 01:12] Round off: 0.06909625713, poly_size: 128
[Dec 3 01:12] Round off: 0.09012404759, poly_size: 256
[Dec 3 01:12] Round off: 0.09836611984, poly_size: 512
[Dec 3 01:13] Stage 2 init complete. 10136 transforms. Time: 67.378 sec.
[Dec 3 01:13] Round off: 0.191300468
[Dec 3 01:22] M28052377 stage 2 complete. 384153 transforms. Total time: 579.687 sec.
[Dec 3 01:22] Round off: 0.1936677887
[Dec 3 01:22] Stage 2 GCD complete. Time: 5.263 sec.
[Dec 3 01:22] M28052377 completed P-1, B1=600000, B2=121965480, Wi4: D2F70E68

[Dec 3 08:58]
[Dec 3 08:58] P-1 on M28040009 with B1=600000, B2=120000000
[Dec 3 08:58] Using FMA3 FFT length 1440K, Pass1=320, Pass2=4608, clm=2, 8 threads
[Dec 3 08:58] Setting affinity to run helper thread 1 on CPU core #2 ...
[Dec 3 09:11] M28040009 stage 1 complete. 1731726 transforms. Total time: 802.705 sec.
[Dec 3 09:11] Round off: 0.34375
[Dec 3 09:11] Conversion of stage 1 result complete. 5 transforms, 1 modular inverse. Time: 8.493 sec.
[Dec 3 09:11] Setting affinity to run helper thread 1 on CPU core #2 ...
[Dec 3 09:11] Switching to FMA3 FFT length 1680K, Pass1=448, Pass2=3840, clm=2, 8 threads
[Dec 3 09:11] Using 19761MB of memory. D: 2730, 288x1190 polynomial multiplication.
[Dec 3 09:11] Round off: 0.007246532776, poly_size: 2, EB: 1.26823, SM: 2.29248
[Dec 3 09:11] Round off: 0.01052497622, poly_size: 4
[Dec 3 09:12] Round off: 0.01707247617, poly_size: 8
[Dec 3 09:12] Round off: 0.02619342368, poly_size: 16
[Dec 3 09:12] Round off: 0.04025678108, poly_size: 32
[Dec 3 09:12] Round off: 0.04762847341, poly_size: 64
[Dec 3 09:12] Round off: 0.06455924855, poly_size: 128
[Dec 3 09:12] Round off: 0.09652106448, poly_size: 256
[Dec 3 09:12] Round off: 0.05227529114, poly_size: 512
[Dec 3 09:12] Stage 2 init complete. 7648 transforms. Time: 36.623 sec.
[Dec 3 09:12] Round off: 0.1491780477
[Dec 3 09:22] M28040009 stage 2 complete. 469459 transforms. Total time: 591.273 sec.
[Dec 3 09:22] Round off: 0.1693160104
[Dec 3 09:22] Stage 2 GCD complete. Time: 5.255 sec.
[Dec 3 09:22] M28040009 completed P-1, B1=600000, B2=120040830, Wi4: D2BFE942

axn · 2021-12-03, 18:09

Quote:

Originally Posted by petrw1

[Dec 3 01:22] M28052377 stage 2 complete. 384153 transforms. Total time: 579.687 sec.

[Dec 3 09:22] M28040009 stage 2 complete. 469459 transforms. Total time: 591.273 sec.

Something's not quite right here. The 24GB option shows about 20% less transforms, yet sees no significant improvement in elapsed time. I wonder if there was some interference or something during these tests. If you have build 1 sitting around, can you repeat the tests and see if the pattern holds?

petrw1 · 2021-12-03, 18:35

Quote:

Originally Posted by axn

Something's not quite right here. The 24GB option shows about 20% less transforms, yet sees no significant improvement in elapsed time. I wonder if there was some interference or something during these tests. If you have build 1 sitting around, can you repeat the tests and see if the pattern holds?

I'm running 24GB in the middle of the night.
No one will be on the computer.
And I am not aware of any overnight processing....at least not all night because these same numbers are on all the overnight runs.

petrw1 · 2021-12-03, 19:32

I reran B1=600K/B2=TBD
Interestingly when it switched from AVX512 to FMA3 it changed the B2.

[Dec 3 12:41] Worker starting
[Dec 3 12:41] Setting affinity to run worker on CPU core #1
[Dec 3 12:41]
[Dec 3 12:41] P-1 on M28053787 with B1=600000, B2=TBD
[Dec 3 12:41] Setting affinity to run helper thread 2 on CPU core #3 ...
[Dec 3 12:41] Using FMA3 FFT length 1536K, Pass1=256, Pass2=6K, clm=4, 8 threads
[Dec 3 12:41] M28053787 stage 1 is 1.10% complete.
[Dec 3 12:55] M28053787 stage 1 complete. 1712436 transforms. Total time: 818.117 sec.
[Dec 3 12:55] Round off: 0.078125
[Dec 3 12:55] Conversion of stage 1 result complete. 5 transforms, 1 modular inverse. Time: 8.424 sec.
[Dec 3 12:55] With trial factoring done to 2^75, optimal B2 is 615*B1 = 369000000.
[Dec 3 12:55] If no prior P-1, chance of a new factor is 5.55%
[Dec 3 12:55] Switching to FMA3 FFT length 1680K, Pass1=448, Pass2=3840, clm=2, 8 threads
[Dec 3 12:55] Setting affinity to run helper thread 5 on CPU core #6 ...
[Dec 3 12:55] With trial factoring done to 2^75, optimal B2 is 555*B1 = 333000000.
[Dec 3 12:55] If no prior P-1, chance of a new factor is 5.48%
[Dec 3 12:55] Using 24827MB of memory. D: 3570, 384x1474 polynomial multiplication.
[Dec 3 12:55] Round off: 0.007483116829, poly_size: 2, EB: 1.0447, SM: 2.39624
[Dec 3 12:56] Round off: 0.01062373627, poly_size: 4
[Dec 3 12:56] Round off: 0.01606212542, poly_size: 8
[Dec 3 12:56] Round off: 0.02399381441, poly_size: 16
[Dec 3 12:56] Round off: 0.04149382492, poly_size: 32
[Dec 3 12:56] Round off: 0.04831414652, poly_size: 64
[Dec 3 12:56] Round off: 0.07144245388, poly_size: 128
[Dec 3 12:56] Round off: 0.0934058712, poly_size: 256
[Dec 3 12:56] Round off: 0.09837685356, poly_size: 512
[Dec 3 12:56] Stage 2 init complete. 10138 transforms. Time: 60.797 sec.
[Dec 3 12:56] Round off: 0.1785826166
[Dec 3 13:21] M28053787 stage 2 complete. 1047025 transforms. Total time: 1479.956 sec.
[Dec 3 13:21] Round off: 0.2112125547
[Dec 3 13:21] Stage 2 GCD complete. Time: 5.265 sec.
[Dec 3 13:21] M28053787 completed P-1, B1=600000, B2=333152400, Wi4: C626955D

lycorn · 2021-12-03, 20:55

Why are you saying it switched from AVX-512 to FMA3 FFT?
As far as I can see, upon entering stage 2 it changed the length of the FFT (and as a consequence the value of B2) but not its type.

petrw1 · 2021-12-03, 22:00

Quote:

Originally Posted by lycorn

Why are you saying it switched from AVX-512 to FMA3 FFT?
As far as I can see, upon entering stage 2 it changed the length of the FFT (and as a consequence the value of B2) but not its type.

I ASS-umed because my PC supports AVX-512 but I turned it off in local.txt.
I couldn't think of another reason for the change...not that there isn't.

R. Gerbicz · 2021-12-03, 22:00

Quote:

Originally Posted by Prime95

On my quad core, 8GB machine:

version 30.8:

Code:

[Work thread Nov 24 05:56] P-1 on M26899981 with B1=1000000, B2=30000000
[Work thread Nov 24 05:57] Conversion of stage 1 result complete. 5 transforms, 1 modular inverse. Time: 9.500 sec.
[Work thread Nov 24 05:57] Switching to FMA3 FFT length 1600K, Pass1=640, Pass2=2560, clm=1, 4 threads using large pages
[Work thread Nov 24 05:57] Using 6788MB of memory.  D: 1050, 120x403 polynomial multiplication.
[Work thread Nov 24 05:58] Stage 2 init complete. 2842 transforms. Time: 11.922 sec.
[Work thread Nov 24 06:15] M26899981 stage 2 complete. 360415 transforms. Total time: 1052.009 sec.
[Work thread Nov 24 06:15] Stage 2 GCD complete. Time: 5.965 sec.
[Work thread Nov 24 06:15] M26899981 completed P-1, B1=1000000, B2=30000000, Wi8: B63F15AE

What is the third number on this line: "D: 1050, 120x403 polynomial multiplication."
just guessing that the 2nd is eulerphi(1050)/2=120, but what is the 403 ?

petrw1 · 2021-12-03, 22:03

Quote:

Originally Posted by axn

Easily done. Run stage 1 only (B1=B2) in one folder, and stage 2 in another folder after copying over the save files.

Would folder 1 prime.txt have UsePrimenet=0?
I'd prefer it send in both stages as 1 result.

2021-12-03, 20:55	#85
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 11000101110₂ Posts	Why are you saying it switched from AVX-512 to FMA3 FFT? As far as I can see, upon entering stage 2 it changed the length of the FFT (and as a consequence the value of B2) but not its type. Last fiddled with by lycorn on 2021-12-03 at 20:58

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2021-12-03, 19:32	#84
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 3·5²·71 Posts	I reran B1=600K/B2=TBD Interestingly when it switched from AVX512 to FMA3 it changed the B2. [Dec 3 12:41] Worker starting [Dec 3 12:41] Setting affinity to run worker on CPU core #1 [Dec 3 12:41] [Dec 3 12:41] P-1 on M28053787 with B1=600000, B2=TBD [Dec 3 12:41] Setting affinity to run helper thread 2 on CPU core #3 ... [Dec 3 12:41] Using FMA3 FFT length 1536K, Pass1=256, Pass2=6K, clm=4, 8 threads [Dec 3 12:41] M28053787 stage 1 is 1.10% complete. [Dec 3 12:55] M28053787 stage 1 complete. 1712436 transforms. Total time: 818.117 sec. [Dec 3 12:55] Round off: 0.078125 [Dec 3 12:55] Conversion of stage 1 result complete. 5 transforms, 1 modular inverse. Time: 8.424 sec. [Dec 3 12:55] With trial factoring done to 2^75, optimal B2 is 615B1 = 369000000. [Dec 3 12:55] If no prior P-1, chance of a new factor is 5.55% [Dec 3 12:55] Switching to FMA3 FFT length 1680K, Pass1=448, Pass2=3840, clm=2, 8 threads [Dec 3 12:55] Setting affinity to run helper thread 5 on CPU core #6 ... [Dec 3 12:55] With trial factoring done to 2^75, optimal B2 is 555B1 = 333000000. [Dec 3 12:55] If no prior P-1, chance of a new factor is 5.48% [Dec 3 12:55] Using 24827MB of memory. D: 3570, 384x1474 polynomial multiplication. [Dec 3 12:55] Round off: 0.007483116829, poly_size: 2, EB: 1.0447, SM: 2.39624 [Dec 3 12:56] Round off: 0.01062373627, poly_size: 4 [Dec 3 12:56] Round off: 0.01606212542, poly_size: 8 [Dec 3 12:56] Round off: 0.02399381441, poly_size: 16 [Dec 3 12:56] Round off: 0.04149382492, poly_size: 32 [Dec 3 12:56] Round off: 0.04831414652, poly_size: 64 [Dec 3 12:56] Round off: 0.07144245388, poly_size: 128 [Dec 3 12:56] Round off: 0.0934058712, poly_size: 256 [Dec 3 12:56] Round off: 0.09837685356, poly_size: 512 [Dec 3 12:56] Stage 2 init complete. 10138 transforms. Time: 60.797 sec. [Dec 3 12:56] Round off: 0.1785826166 [Dec 3 13:21] M28053787 stage 2 complete. 1047025 transforms. Total time: 1479.956 sec. [Dec 3 13:21] Round off: 0.2112125547 [Dec 3 13:21] Stage 2 GCD complete. Time: 5.265 sec. [Dec 3 13:21] M28053787 completed P-1, B1=600000, B2=333152400, Wi4: C626955D