New Intel Arc A770 all WUs marked invalid

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DrPop [BlackOps]
DrPop [BlackOps]
Joined: 1 May 10
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21 Mar 2023 17:51:07 UTC
Topic 229276
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    I recently purchased a new Intel Arc A770 16GB GPU to see how well it would do crunching. All 10 WUs I tested completed just fine. Unfortunately, it looks like each of them are now coming back marked invalid. Is there a known issue with the Arc GPUs at this point that may be fixed in the future, or any tips for something to try changing on my end?

    Thanks for any ideas!
    Jed

    Keith Myers
    Keith Myers
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    With your computers hidden,

    21 Mar 2023 18:54:12 UTC
    Message 210016
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      With your computers hidden, we can't look at your results to examine the output log and maybe determine why the ARC card can't validate any tasks.

       

      DrPop [BlackOps]
      DrPop [BlackOps]
      Joined: 1 May 10
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      Sorry about that, no idea why

      22 Mar 2023 6:06:26 UTC
      Message 210026
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        Sorry about that, no idea why they were hidden. Hopefully the computer is visible now, and thanks for any ideas!

        Keith Myers
        Keith Myers
        Joined: 11 Feb 11
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        It is as I suspected.  The

        22 Mar 2023 6:23:02 UTC
        Message 210027
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          It is as I suspected.  The ARC cards can't be used on this project, or at least this application because the application need hardware FP64 support which the ARC cards are incapable of.

          Same situation as the Milkyway project which demands FP64 support.  No ARC cards can be used there either.

          You need to find another application on this project or other projects that don't call FP64 instructions in their execution.

          Here is your error on your failed and invalid tasks:

          OpenCL compiling FAILED! : -11 . Error message: 1:10:30: error: unknown type name 'double2'; did you mean 'double'?
__kernel void test( __global double2 *vec) {
                             ^~~~~~~
                             double
1:10:30: error: use of type 'double' requires cl_khr_fp64 extension to be enabled

          OpenCL device has no FP64 support


           

          Ian&Steve C.
          Ian&Steve C.
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          Arc cards have no hardware

          22 Mar 2023 12:56:56 UTC
          Message 210033 in response to message 210027
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            Arc cards have no hardware FP64 support, but they have a software emulation workaround. it can still do the task

            Zou's Arc A750 card here is doing the FGRPB1G tasks pretty well, only ~2% invalid. but he gets a lot of invalids when running BRP4.

            https://einsteinathome.org/host/13011635/tasks/0/40

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            DrPop [BlackOps]
            DrPop [BlackOps]
            Joined: 1 May 10
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            Credit: 189077863
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            Thanks for the help! Really

            22 Mar 2023 16:52:22 UTC
            Message 210044
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              Thanks for the help! Really wanted to give Intel some support and help a 3rd GPU maker give us more competition for NV and AMD, but maybe just not worth it for crunching on. I'll give that other sub project a try and see if it's worth running on an ARC or not.

              EDIT: What's the best FP64 capable GPU these days for Einstein and Milkyway?

              Ian&Steve C.
              Ian&Steve C.
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              best all around for both is

              22 Mar 2023 17:15:54 UTC
              Message 210045
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                best all around for both is likely the Nvidia Titan V.

                about the same speed as a 2080Ti at Einstein, but an absolute rocket ship for Milkyway.

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