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The old TF branch is now working

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  • The old TF branch is now working

    For everybody to know: the old TF branch of gpuOwl currently works under the following conditions:
    • ROCm version: 4.2.0
    • Hardware: Radeon VII and Radeon Pro VII
    • OS: Ubuntu 20.04 / kernel 5.4.0-73-generic
    • Compiler: g++ (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
    However the results can't be submitted to Primenet:

    Found 2 lines to process.
    Done processing:
    * Parsed 1 lines.
    * Found 0 datestamps.
    GHz-days

    Qty Work Submitted Accepted Average
    0 - all - 0.000

    Did not understand 1 lines.
    Recognized, but ignored 0/0 of the remaining lines.
    Skipped 0 lines already in the database.
    Accepted 0 lines.

    These lines were unknown:

    {"exponent":"333730849", "worktype":"TF", "status":"NF", "program":{"name":"gpuowl", "version":"4.7-5b01b65-mod"}, "timestamp":"2021-06-05 08:14:07 UTC", "aid":"715A1D17BA9C63A6CCC66D09A3D3790B""bitlo ":76 , "bithi":77, "begink":"113201797068360", "endk":"226403807589960", "rangecomplete":true}


    Problems in the result line:
    1. Lacks username;
    2. Lacks a comma before bitlo;
    3. Datestamp not found;
    4. GHz-days not found.

    Owner
    preda commented 3 days ago
    Two questions:
    1. does it find factors?
    2. with a competitive speed, to be worth it?

    Contributor Author
    valeriob01 commented 3 days ago
    Two questions:

    1. does it find factors?
    I would need an already factored exponent that is known to have factors to test...

    2. with a competitive speed, to be worth it?
    absolutely, it is very fast, faster than my RX Vega 64.
    and I have tested running both PRP and TF on the same GPU at the same time and there was very little performance dropdown !

    Contributor Author
    valeriob01 commented 3 days ago
    I found an exponent to test which is known to have factors because I have already computed it:
    • Exponent: 199999673
    • Bitlevel: 74-75
    • Factor: Factor: 20677946129698001050849
    will post the result here.

    Contributor Author
    valeriob01 commented 3 days ago
    I found an exponent to test which is known to have factors because I have already computed it:

    * Exponent: 199999673 * Bitlevel: 74-75 * Factor: Factor: 20677946129698001050849

    will post the result here.

    2021-06-05 18:29:46 {"exponent":"199999673", "worktype":"TF", "status":"F", "program":{"name":"gpuowl", "version":"4.7-5b01b65-mod"}, "timestamp":"2021-06-05 16:29:46 UTC", "aid":"715A1D17BA9C63A6CCC66D09A3D3790B""bitlo ":74 , "bithi":75, "begink":"47223742025460", "endk":"94456847945460", "rangecomplete":false, "factors":["51694949845488"]} 2021-06-05 18:29:46 Bye

    Contributor Author
    valeriob01 commented 3 days ago
    I found an exponent to test which is known to have factors because I have already computed it:

    * Exponent: 199999673 * Bitlevel: 74-75 * Factor: Factor: 20677946129698001050849

    will post the result here.

    2021-06-05 18:29:46 {"exponent":"199999673", "worktype":"TF", "status":"F", "program":{"name":"gpuowl", "version":"4.7-5b01b65-mod"}, "timestamp":"2021-06-05 16:29:46 UTC", "aid":"715A1D17BA9C63A6CCC66D09A3D3790B""bitlo ":74 , "bithi":75, "begink":"47223742025460", "endk":"94456847945460", "rangecomplete":false, "factors":["51694949845488"]} 2021-06-05 18:29:46 Bye

    That is another factor, what it means?

    Owner
    preda commented 3 days ago
    Have a look here:
    https://www.mersenne.ca/exponent/199999673
    the factors are of the form 2* k *exponent -1, and what is reported above is the "k" for the factor. Can easily be changed between the two.

    Contributor Author
    valeriob01 commented 3 days ago
    Have a look here:
    https://www.mersenne.ca/exponent/199999673
    the factors are of the form 2* k *exponent -1, and what is reported above is the "k" for the factor. Can easily be changed between the two.

    So the program is working, it only needs adapting the result line so that Primenet accepts it...

    Contributor Author
    valeriob01 commented 3 days ago
    Have a look here:
    https://www.mersenne.ca/exponent/199999673
    the factors are of the form 2* k *exponent -1, and what is reported above is the "k" for the factor. Can easily be changed between the two.

    So the program is working, it only needs adapting the result line so that Primenet accepts it...

    Ok, and also primenet.py needs the TF (2) worktype to fetch trial factoring work.

    Contributor Author
    valeriob01 commented 3 days ago
    Here's some benchmark for trial factoring exponent 218812621, bitlevel 73-74:
    Radeon VII:
    • GHz: 710-790
    • ETA: 17 minutes
    Radeon Pro VII:
    • GHz: 780-890
    • ETA: 16 minutes

    Contributor Author
    valeriob01 commented 3 days ago
    Here's some benchmark for trial factoring exponent 218812621, bitlevel 73-74:
    Radeon VII:

    * GHz: 710-790 * ETA: 17 minutes
    Radeon Pro VII:

    * GHz: 780-890 * ETA: 16 minutes

    For comparison: benchmark for mfakto on RX Vega 64, same exponent, same bitlevel:
    • GHz/day: 634.55
    • ETA: 19m44s
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