gpuOwL: an OpenCL program for Mersenne primality testing

[philbo0042]

Has anyone experienced gpuOwL ignoring their assignments? It worked fine a few nights ago for a different assignment type, but I cannot get it to factor. I searched for a few keywords like "ignored" and received no results.

How can I fix this?

2019-11-12 18:40:50 config: -device 0 -use INLINE_X2 -user philbo0042 -cpu philbolt/gtx860m
2019-11-12 18:40:50 philbolt/gtx860m worktodo.txt: "Factor=BE2FB21509310079DFF41F91943C9383,109950823,72,73" ignored
2019-11-12 18:40:50 philbolt/gtx860m Bye
2019-11-12 18:41:49 config: -device 0 -use FMA_X2 -user philbo0042 -cpu philbolt/gtx860m
2019-11-12 18:41:49 philbolt/gtx860m worktodo.txt: "Factor=BE2FB21509310079DFF41F91943C9383,109950823,72,73" ignored
2019-11-12 18:41:49 philbolt/gtx860m Bye
2019-11-12 18:49:28 config: -device 0 -use FMA_X2 -user philbo0042 -cpu philbolt/gtx860m
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=310ECF8B64F9E20CFA41B11035B4475E,109950697,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=966181AA0013466E23F7F9EBCED49BE9,109950703,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=6ABDAEF1C8ECF991725D88136B611892,109950811,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=3F9154058C130B4FBB8BEEDB5CCBDE50,109950817,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=BE2FB21509310079DFF41F91943C9383,109950823,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m Bye

[kracker]

Originally Posted by philbo0042

Has anyone experienced gpuOwL ignoring their assignments? It worked fine a few nights ago for a different assignment type, but I cannot get it to factor. I searched for a few keywords like "ignored" and received no results.

How can I fix this?

2019-11-12 18:40:50 config: -device 0 -use INLINE_X2 -user philbo0042 -cpu philbolt/gtx860m
2019-11-12 18:40:50 philbolt/gtx860m worktodo.txt: "Factor=BE2FB21509310079DFF41F91943C9383,109950823,72,73" ignored
2019-11-12 18:40:50 philbolt/gtx860m Bye
2019-11-12 18:41:49 config: -device 0 -use FMA_X2 -user philbo0042 -cpu philbolt/gtx860m
2019-11-12 18:41:49 philbolt/gtx860m worktodo.txt: "Factor=BE2FB21509310079DFF41F91943C9383,109950823,72,73" ignored
2019-11-12 18:41:49 philbolt/gtx860m Bye
2019-11-12 18:49:28 config: -device 0 -use FMA_X2 -user philbo0042 -cpu philbolt/gtx860m
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=310ECF8B64F9E20CFA41B11035B4475E,109950697,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=966181AA0013466E23F7F9EBCED49BE9,109950703,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=6ABDAEF1C8ECF991725D88136B611892,109950811,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=3F9154058C130B4FBB8BEEDB5CCBDE50,109950817,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m worktodo.txt: "Factor=BE2FB21509310079DFF41F91943C9383,109950823,72,73" ignored
2019-11-12 18:49:28 philbolt/gtx860m Bye

gpuowl does not do Trial Factoring - for that, you need mfaktc (mfaktc for nVidia, mfakto for AMD)

https://mersenneforum.org/mfaktc/ (not the extra-versions for "normal" use)

EDIT: Thinking about it.. it would be nice if many of the applications could be combined into one program... Probably hard and not worthwhile, but still a nice thought.

[kriesel]

Originally Posted by philbo0042

Has anyone experienced gpuOwL ignoring their assignments? It worked fine a few nights ago for a different assignment type, but I cannot get it to factor. I searched for a few keywords like "ignored" and received no results.

How can I fix this?

Run gpuowl V3.7 on an AMD gpu, on linux. https://www.mersenneforum.org/showpo...83&postcount=7
Preda experimented with including TF in gpuowl, and decided to leave it to mfakto and mfaktc.

Judging from the program's help output, TF was removed from gpuowl by v6.2.

[philbo0042]

Thank you both! mfaktc was very easy to get going. I am factoring away.

[kriesel]

Originally Posted by philbo0042

Thank you both! mfaktc was very easy to get going. I am factoring away.

You could probably increase its output rate with some tuning. See https://www.mersenneforum.org/showpo...99&postcount=8

[storm5510]

gpuOwl will run PRP's but not LL's. Is this correct? If it will run LL tests, then I've not seen any configuration or command-line options to make it do so.

[preda]

Originally Posted by storm5510

gpuOwl will run PRP's but not LL's. Is this correct? If it will run LL tests, then I've not seen any configuration or command-line options to make it do so.

Yes, PRP only. LL could be added (back), but it would only make sense for double-checking (not first time); and it would only support offset==0 which I don't know whether is considered OK for DC.

[storm5510]

Originally Posted by preda

Yes, PRP only. LL could be added (back), but it would only make sense for double-checking (not first time); and it would only support offset==0 which I don't know whether is considered OK for DC.

Thank you for the feedback. Most kind.

I had problems getting it to run yesterday. As it turned out, I did not have the entire package. I downloaded it from James Heinrich's mirror on mersenne.ca. It ran fine after that.

[kriesel]

This is on the version-missing version of George's recent gpuowl build for Radeon VII. I had a typo in my worktodo entry (missing the 1 in B1), and possibly as a result, the P-1 stage 2 GCD of the preceding entry was skipped, and the program exited after reading the next entry.

2019-11-17 16:08:19 150000407 P2 2880/2880: setup  548 ms; 2077 us/prime, 28324 primes
2019-11-17 16:08:21 waiting for background GCDs..
2019-11-17 16:08:21 worktodo.txt: "B=440000,B2=8360000;PFactor=0,1,2,50001781,-1,73,2" ignored
2019-11-17 16:08:21 200001103 FFT 11264K: Width 256x4, Height 64x8, Middle 11; 17.34 bits/word
2019-11-17 16:08:21 OpenCL args "-DEXP=200001103u -DWIDTH=1024u -DSMALL_HEIGHT=512u -DMIDDLE=11u -DWEIGHT_STEP=0xc.a4d79e8df3f6p-3 -DIWEIGHT_STEP=0xa.1f9a334b0d2fp-4 -DWEIGHT_BIGSTEP=0x9.837f0518db8a8p-3 -DIWEIGHT_BIGSTEP=0xd.744fccad69d68p-4 -DFMA_X2=1  -I. -cl-fast-relaxed-math -cl-std=CL2.0"
(program exit)

[kriesel]

Bold part at the end seems to be some sort of error message traceback from the gmp routine, stepping on the gpuowl console output. It appears only on the console output, not in the gpuowl log.

2019-11-17 17:01:44 50001781 P2 2880/2880: setup 1442 ms; 1322 us/prime, 33184 primes
2019-11-17 17:01:45 150000407 FFT 8192K: Width 256x8, Height 256x8; 17.88 bits/word
2019-11-17 17:01:45 using long carry kernels
2019-11-17 17:01:45 OpenCL args "-DEXP=150000407u -DWIDTH=2048u -DSMALL_HEIGHT=2048u -DMIDDLE=1u -DWEIGHT_STEP=0x8.af68dd2d432ap-3 -DIWEIGHT_STEP=0xe.bcdb8e961b77p-4 -DWEIGHT_BIGSTEP=0x8.b95c1e3ea8bd8p-3 -DIWEIGHT_BIGSTEP=0xe.ac0c6e7dd2438p-4 -DFMA_X2=1  -I. -cl-fast-relaxed-math -cl-std=CL2.0"
2019-11-17 17:01:54 OpenCL compilation in 8624 ms
2019-11-17 17:01:56 150000407 P1 B1=1280000, B2=28160000; 1846946 bits; starting at 1846945
2019-11-17 17:01:56 150000407 P2 B1=1280000, B2=28160000, starting at 2821
2019-11-17 17:01:57 P-1 (B1=1280000, B2=28160000, D=30030): primes 1652163, expanded 1692940, doubles 272239 (left 1121863), singles 1107685, total 1379924 (84%)
2019-11-17 17:01:57 150000407 P2 using blocks [43 - 938] to cover 1379924 primes
2019-11-17 17:01:58 150000407 P2 using 217 buffers of 64.0 MB each
2019-11-17 17:02:25 50001781 P2 GCD: 4392938042637898431087689
2019-11-17 17:02:25 {"exponent":"50001781", "worktype":"PM1", "status":"F", "program":{"name":"gpuowl", "version":""}, "timestamp":"2019-11-17 23:02:25 UTC", "user":"kriesel", "computer":"roa/radeonvii", "aid":"0", "fft-length":2883584, "B1":440000, "B2":8360000, "factors":["4392938042637898431087689"]}
2019-11-17 17:02:57 150000407 P2 2880/2880: setup  803 ms; 2057 us/prime, 28324 primes
2019-11-17 17:02:58 waiting for background GCDs..
2019-11-17 17:02:58 200001103 FFT 11264K: Width 256x4, Height 64x8, Middle 11; 17.34 bits/word
2019-11-17 17:02:58 OpenCL args "-DEXP=200001103u -DWIDTH=1024u -DSMALL_HEIGHT=512u -DMIDDLE=11u -DWEIGHT_STEP=0xc.a4d79e8df3f6p-3 -DIWEIGHT_STEP=0xa.1f9a334b0d2fp-4 -DWEIGHT_BIGSTEP=0x9.837f0518db8a8p-3 -DIWEIGHT_BIGSTEP=0xd.744fccad69d68p-4 -DFMA_X2=1  -I. -cl-fast-relaxed-mAastshe r-tcilo-ns tfda=iClLe2d.:0 "m
pz_cmp_ui(b, 0), file GmpUtil.cpp, line 25
C:\Users\ken\Documents\gpuowl-gw-patch>

The 50M gcd completed. The 150M gcd got lost.

[kriesel]

Originally Posted by storm5510

gpuOwl will run PRP's but not LL's. Is this correct? If it will run LL tests, then I've not seen any configuration or command-line options to make it do so.

It's possible today with existing versions of gpuowl to run any of the following. Each is a different version or range of versions.

• LL with pseudorandom offset, 4M fft (v0.5)
• LL with zero offset, Jacobi check, 4M fft (v0.6)
• PRP with GEC, zero offset, residue type 4, multiple fft sizes (~v4.3 to 6.5)
• PRP with GEC, zero offset, residue type 1, multiple fft sizes (V6.5-30c0508 or later, and numerous earlier versions)

This and much more is documented. https://www.mersenneforum.org/showpo...83&postcount=7

Coincidentally, I've run three of these four cases this weekend on the same Radeon VII gpu.
The 4M fft LL versions are ok for exponents between 50000000 and 78000000. Usable now for LL DC being done now.
There may be PrimeNet issues with unassigned results.