FGRPB1G tasks computation error

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mugnaio [TNAA]
mugnaio [TNAA]
Joined: 2 Jul 14
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13 May 2017 20:57:31 UTC
Topic 207616
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    Hello all,

     

    in the past days I tried to run some FGRPB1G tasks on my ATI HD 5850 but all of them fail after a bunch of seconds. The stderr log reports a "process exited with code 65" message and there are also these two messages:

     

    Error during OpenCL bloc_info host->device transfer - candidates (error: -4)ERROR: opencl_prepare_power_toplist() returned with error 0

    If interested in the full log, please take a look at https://einsteinathome.org/task/642657751

    The card has 1Gb RAM and I had to set GPU_MAX_HEAP_SIZE and GPU_MAX_ALLOC_PERCENT to get rid of the "low_memory_configuration not supported" error. Some other posts in the forum pointed out that 1 Gb may not be enough but they also mentioned a forthcoming release of the application with less hw requirements.

    Boinc recognizes the card and its openCL capabilities (below is the log with GPU_MAX_HEAP_SIZE set to 90%, but I also tried with 100%)

    10-May-2017 23:31:47 [---] OpenCL: AMD/ATI GPU 0: ATI Radeon HD 5800/5900 series (Cypress/Hemlock) (driver version 1642.5, device version OpenCL 1.2 AMD-APP (1642.5), 1024MB, 881MB available, 4176 GFLOPS peak)

    The ATI driver is fglrx-14.501.1003, which seems the latest that allows clinfo to detect and list the GPU as an opencl device; OS is Linux Debian 8.7 (Jessie).

    In the past the same card crunched BRP6 and BRP4G tasks without problems.

    Do those FGRPB1G tasks require more than 1Gb RAM to run or am I missing something else ?

     

    Thanks in advance

    Andrea

    AgentB
    AgentB
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    mugnaio _TNAA_ wrote:Do those

    14 May 2017 9:19:20 UTC
    Message 157864
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      mugnaio _TNAA_ wrote:
      Do those FGRPB1G tasks require more than 1Gb RAM to run or am I missing something else ?

      This application needs more VRAM than the older applications.  I had two gtx-480 which could easily handle two-three BRP6 tasks in the past but could not handle one FGRPB1G due to insufficient VRAM memory.

      I suspect you will need to free some VRAM if this is going to work at all, and that will be challenging if you need a monitor.

      Some other discussions here

      Good luck.

      mugnaio [TNAA]
      mugnaio [TNAA]
      Joined: 2 Jul 14
      Posts: 2
      Credit: 1409609
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      thanks Agentb for pointing

      15 May 2017 17:05:39 UTC
      Message 157917
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        thanks Agentb for pointing out that discussion, I didn't find it previously.

        I think I'm going to waste some other wu to try and tune those ATI GPU_* params.

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