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drummers-lowrise
1) Message boards : Number crunching : WW & 3080 ranking? (Message 150006)
Posted 194 days ago by Profile mfl0pProject donor
Why are the lists split into "geforce xyz" and "nvidia geforce xyz"?

(1.000) NVIDIA GeForce RTX 3090
(0.921) GeForce RTX 3090
(0.871) GeForce RTX 3080
(0.867) NVIDIA GeForce RTX 3080


probably because this is how the driver reports the GPU name.
2) Message boards : Number crunching : PrimeGrid Years (Message 148461)
Posted 256 days ago by Profile mfl0pProject donor
11 years. I found PrimeGrid when I was looking for a project with open source applications that I could port to the PS3. And I did just that with AP26!
3) Message boards : Aggie The Pew message board (Message 148163)
Posted 263 days ago by Profile mfl0pProject donor
my PPSE was sent to two people before me that aborted it :)

looks like both were trying to bunker maybe?
4) Message boards : Wieferich and Wall-Sun-Sun Prime Search : WW project is live (Message 146766)
Posted 309 days ago by Profile mfl0pProject donor
I'll give my developer input on the CPU credit discussion.

The WW program was designed for GPUs. The CPU program is an adaption of the GPU algorithm so people can crunch on their CPUs if they don't have access to a GPU. At PrimeGrid, this a has been the tradition to allow as many people to participate as possible.

The CPU app can be made much faster with a different algorithm, however, in order for the checksums to match for workunit validation, it must process the workunit like the GPU program. This results in what seems like "low" CPU credits for WW.
5) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Slow speed on RX 5700XT (Message 146571)
Posted 315 days ago by Profile mfl0pProject donor

The only difference I could spot so far is WWocl version 1.00/1.0.2 vs 1.02/1.0.3 - does this explain the vastly shorter runtime?


Yes, gpu load should be higher with the new version.
6) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Adjusting GPU load / screen refresh (Message 146512)
Posted 316 days ago by Profile mfl0pProject donor
The new version 1.03 for Windows/Linux has an optional command line parameter that can be used to tune screen refresh and GPU load.

This option isn't needed or supported for NVIDIA Pascal or newer GPUs on Windows 10.
Windows 10 uses different GPU scheduling on Pascal+ GPUs making this feature unnecessary.

The -ws # command line option is for the user to adjust GPU load higher for faster computation or lower for better screen refresh rate. Usage: -ws 10 for default, -ws 1 for lowest GPU load, -ws 100 for highest GPU load. Worksize can be any number from 1 to 100.

You will need to make an app_config.xml in the BOINC\projects\www.primegrid.com directory with the following for Nvidia:
<app_config> <app_version> <app_name>ww</app_name> <plan_class>OCL_cuda_WW</plan_class> <cmdline>-ws 10</cmdline> </app_version> </app_config>


Or for AMD:
<app_config> <app_version> <app_name>ww</app_name> <plan_class>opencl_ati_WW</plan_class> <cmdline>-ws 10</cmdline> </app_version> </app_config>


edited, thanks stream
7) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Slow speed on RX 5700XT (Message 145934)
Posted 326 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.
8) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Error's running GPU WU's !!! (Message 145918)
Posted 326 days ago by Profile mfl0pProject donor
The linux 960 looks like it needs opencl installed. Try installing ocl-icd-opencl-dev
9) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Any idea on WU times CPU vs. GPU? (Message 145754)
Posted 328 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.
10) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Any idea on WU times CPU vs. GPU? (Message 145657)
Posted 331 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.


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