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1) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Slow speed on RX 5700XT (Message 145934)
Posted 2 days ago by Profile mfl0pProject donor
A future update to the program should see increased GPU utilization percentage.

The 20 compute units info comes directly from AMD's driver. You can see this in GFN's stderr.txt also, where the compute units are listed at 20. The programs simply report what AMD's video driver is telling it. In this case, incorrect information.
2) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Error's running GPU WU's !!! (Message 145918)
Posted 2 days ago by Profile mfl0pProject donor
The linux 960 looks like it needs opencl installed. Try installing ocl-icd-opencl-dev
3) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Any idea on WU times CPU vs. GPU? (Message 145754)
Posted 4 days ago by Profile mfl0pProject donor
Will the CPU app use any of those "fancy" instruction sets like AVX or SSE, or will it just use regular, plain x86?


No vector operations at this time.
4) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Any idea on WU times CPU vs. GPU? (Message 145657)
Posted 7 days ago by Profile mfl0pProject donor
Mike is correct, 64 bit integer math is used on the gpu. The standard double checking is used because each WW workunit is testing millions of primes. A LLR2 workunit is testing just one number for primality, allowing for a fast dc test.
5) Message boards : Number crunching : WW testing (Message 144887)
Posted 33 days ago by Profile mfl0pProject donor
you need to run the program 3 times, with the search range parameters like this:

./WW_opencl_macintel64 461168595e10 461168602e10
expected checksum: 67029FBFBC1AEFB0

./WW_opencl_macintel64 1 6e10
expected checksum: 2F32CAD23BA5B1CA

./WW_opencl_macintel64 227630e10 227636e10
expected checksum: B8B040FA3813FEB2

to run on the AMD gpu and not Intel, try making a file called init_data.xml containing
<app_init_data> <gpu_type>ATI</gpu_type> <gpu_device_num>0</gpu_device_num> </app_init_data>

and put it in the same directory.
6) Message boards : Number crunching : WW testing (Message 144504)
Posted 43 days ago by Profile mfl0pProject donor
Mac OpenCL app is available for testing.
7) Message boards : Number crunching : WW testing (Message 144433)
Posted 44 days ago by Profile mfl0pProject donor

I found that it's fine with a parameter up to 6e8:

Checkpoint range size 599999873 processed at 600.00 Million numbers per second.
Estimated time remaining: 0s
Workunit complete. Average speed: 31.33 Million primes per second.
Checksum: 3A693971FB152B22

It's with 6e9 up it fails.


The error should be fixed now, if you could test the new build that would be appreciated.
I'm waiting on a new build of the Mac OpenCL app and will post to this thread when available.
8) Message boards : Number crunching : WW testing (Message 144430)
Posted 44 days ago by Profile mfl0pProject donor


But in case 2 I don't get a CRC. The results file has two primes and 4472 special instances.

stderr suggests some unhappiness:

Detected Windows 10.0, using compute preemption.
Kernel profile: 65.608 ms. Estimated / Actual worksize: 1312000000 / 2999642969
Verifying GPU kernels using range 127 to 2000127...
GPU prime generator kernel test passed. (148957 PRPs)
GPU Wieferich/WallSunSun kernel tests passed. (142429717748 checksum, 3159 results)
Starting search...
Computation error, GPU found a composite result: 914255785

That's on Windows, nvidia driver 456.71.


thanks for testing, i'm looking into this error.
9) Message boards : Number crunching : WW testing (Message 144391)
Posted 44 days ago by Profile mfl0pProject donor
If someone tests a 3080 could you also post the primes per second average speed? Thanks
10) Message boards : AP26 - AP27 Search : New app v2.08 live, CPU MT / AMD Navi support (Message 142391)
Posted 114 days ago by Profile mfl0pProject donor
It's not needed.


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