mtsieve - Page 118

kruoli · 2023-06-24, 12:26

Quote:

Originally Posted by ryanp

Code:

  p=11285155907, 22.40K p/sec, 22114 factors found at 1.67 sec per factor (last 303 min), 0.9% done. ETC 2023-07-16 20:51

Is this with more candidates than the inital try? If not, 22.40K p/sec is still pretty slow.

ryanp · 2023-06-24, 12:50

Quote:

Originally Posted by kruoli

Is this with more candidates than the inital try? If not, 22.40K p/sec is still pretty slow.

No, same input file as the first try (~295K input terms). I'm using -g 108, and not passing -G or -W.

kruoli · 2023-06-24, 13:15

Have you double checked that it is running on the correct device with nvidia-smi? Which driver version are you using? What does ./xyyxsievecl -h give for OpenCL devices? Example:

Code:

List of available platforms and devices
Platform 0 is a NVIDIA Corporation NVIDIA CUDA, version OpenCL 3.0 CUDA 12.1.68
   Device 0 is a NVIDIA Corporation NVIDIA GeForce RTX 3090 Ti
   Device 1 is a NVIDIA Corporation NVIDIA GeForce RTX 3090 Ti

ryanp · 2023-06-24, 14:12

Quote:

Originally Posted by kruoli

Have you double checked that it is running on the correct device with nvidia-smi? Which driver version are you using? What does ./xyyxsievecl -h give for OpenCL devices? Example:

Code:

List of available platforms and devices
Platform 0 is a NVIDIA Corporation NVIDIA CUDA, version OpenCL 3.0 CUDA 12.1.68
   Device 0 is a NVIDIA Corporation NVIDIA GeForce RTX 3090 Ti
   Device 1 is a NVIDIA Corporation NVIDIA GeForce RTX 3090 Ti

There is only one GPU device on this system, and nvidia-smi shows it 100% utilized.

Code:

Sat Jun 24 14:11:10 2023       
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 530.30.02              Driver Version: 530.30.02    CUDA Version: 12.1     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                  Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf            Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+======================|
|   0  NVIDIA A100-SXM4-40GB           On | 00000000:00:04.0 Off |                    0 |
| N/A   54C    P0              245W / 400W|    443MiB / 40960MiB |    100%      Default |
|                                         |                      |             Disabled |
+-----------------------------------------+----------------------+----------------------+
+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|    0   N/A  N/A     63836      C   ./xyyxsievecl                               440MiB |
+---------------------------------------------------------------------------------------+

storm5510 · 2023-06-24, 14:28

Quote:

Originally Posted by gd_barnes

...For anyone using 1.7.2 for the extra speed because it is no longer missing factors when using the Legendre tables, you should be OK if your base is not a power. Storm and Pepi, this means you will be OK. Your bases 78 and 773 are not powers so this error will not affect them...

Very well. Thanks for the update.

ryanp · 2023-06-26, 17:57

I'm still seeing this with xyyxsievecl:

Code:

p=4764640901, 43.89K p/sec, 4310 factors found at 22.46 sec per factor
p=4764640901, 44.81K p/sec, 4391 factors found at 22.87 sec per factor
Fatal Error:  Something is wrong.  Counted terms (142382) != expected terms (146771)

rogue, I can send you an input file via PM if you want.

k0r3 · 2023-06-26, 19:34

Hi, I've been experimenting with twinsieve and seem to have run into an issue when resuming a file. It seems to work fine if I start from scratch, but if I try to resume a sieve file it doesn't work. I have tried all formats and files created with twinsieve or newpgen doesn't seem to matter. Newpgen format doesn't give an error but just silently dies.

Code:

twinsieve v1.6.2, a program to find factors of k*b^n+1/-1 numbers for fixed b and n and variable k
Fatal Error:  Line 1 exponents in ABCD input file twin.txt do not match

rogue · 2023-06-26, 20:28

Quote:

Originally Posted by k0r3

Hi, I've been experimenting with twinsieve and seem to have run into an issue when resuming a file. It seems to work fine if I start from scratch, but if I try to resume a sieve file it doesn't work. I have tried all formats and files created with twinsieve or newpgen doesn't seem to matter. Newpgen format doesn't give an error but just silently dies.

Code:

twinsieve v1.6.2, a program to find factors of k*b^n+1/-1 numbers for fixed b and n and variable k
Fatal Error:  Line 1 exponents in ABCD input file twin.txt do not match

What command line arguments did you use to start (not continue) the sieve? What is the first line of the ABCD file?

k0r3 · 2023-06-26, 20:38

Quote:

Originally Posted by rogue

What command line arguments did you use to start (not continue) the sieve? What is the first line of the ABCD file?

I have tried many different combinations of command line arguments and have not been able to get a file that works, here is my most recent one

Code:

.\twinsieve.exe -P 1e10 -o out.txt -k1 -K99999 -b2 -n12345 -t1

Here's the ABCD and Newpgen first lines I tried most recently.

Code:

ABCD $a*2^12345+1 & $a*2^12345-1  [3339] // Sieved to 10000000019

9650251852537:T:0:2:3
1293 333330

rogue · 2023-06-27, 13:55

Quote:

Originally Posted by k0r3

I have tried many different combinations of command line arguments and have not been able to get a file that works, here is my most recent one

Code:

.\twinsieve.exe -P 1e10 -o out.txt -k1 -K99999 -b2 -n12345 -t1

Here's the ABCD and Newpgen first lines I tried most recently.

Code:

ABCD $a*2^12345+1 & $a*2^12345-1  [3339] // Sieved to 10000000019

9650251852537:T:0:2:3
1293 333330

Problem found and fixed in sourceforge

rogue · 2023-06-27, 14:26

Quote:

Originally Posted by ryanp

I'm still seeing this with xyyxsievecl:

Code:

p=4764640901, 43.89K p/sec, 4310 factors found at 22.46 sec per factor
p=4764640901, 44.81K p/sec, 4391 factors found at 22.87 sec per factor
Fatal Error:  Something is wrong.  Counted terms (142382) != expected terms (146771)

rogue, I can send you an input file via PM if you want.

Problem found and fixed in sourceforge.

2023-06-24, 13:15	#1290
kruoli "Oliver" Sep 2017 Porta Westfalica, DE 23×71 Posts	Have you double checked that it is running on the correct device with nvidia-smi? Which driver version are you using? What does ./xyyxsievecl -h give for OpenCL devices? Example: Code: List of available platforms and devices Platform 0 is a NVIDIA Corporation NVIDIA CUDA, version OpenCL 3.0 CUDA 12.1.68 Device 0 is a NVIDIA Corporation NVIDIA GeForce RTX 3090 Ti Device 1 is a NVIDIA Corporation NVIDIA GeForce RTX 3090 Ti

2023-06-26, 19:34	#1294
k0r3 Mar 2023 Canada 3×5 Posts	twinsieve issue Hi, I've been experimenting with twinsieve and seem to have run into an issue when resuming a file. It seems to work fine if I start from scratch, but if I try to resume a sieve file it doesn't work. I have tried all formats and files created with twinsieve or newpgen doesn't seem to matter. Newpgen format doesn't give an error but just silently dies. Code: twinsieve v1.6.2, a program to find factors of kb^n+1/-1 numbers for fixed b and n and variable k Fatal Error: Line 1 exponents in ABCD input file twin.txt do not match Last fiddled with by k0r3 on 2023-06-26 at 19:36 Reason: added more info*