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Posts by Anthony Waters

21) Message boards : Number crunching : Linux x64 CUDA app - HOWTO?.. (Message 34650)
Posted 18 Dec 2009 by Anthony Waters
Post:
Do other CUDA applications experience the same behavior?

Is the boinc user in the video group?
22) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34513)
Posted 14 Dec 2009 by Anthony Waters
Post:
Hrmm spoke too soon, I think. Getting more frequent with the computation errors across the board, but I am starting to suspect drivers issue., so I'm gonna revert back to 191.07 and let that go for a bit.


I see

Error executing gpu__integral_kernel3 error message: unknown error

a few other people are experiencing the same thing, I'm thinking it might be something to do with the way the memory is freed when the application is done executing. I'll look into the issue in more depth over the week.
23) Message boards : Application Code Discussion : CUDA for Milkyway@Home (Message 34419)
Posted 9 Dec 2009 by Anthony Waters
Post:
This issue should be resolved in the latest version (0.24) available on BOINC.

which is not available in code repository...


Thanks for the reminder

http://milkyway.cs.rpi.edu/milkyway/download/code_release/mw_gpu_v0.24.tar
http://milkyway.cs.rpi.edu/milkyway/download/code_release/mw_gpu_v0.24.zip
24) Message boards : Application Code Discussion : CUDA for Milkyway@Home (Message 34343)
Posted 7 Dec 2009 by Anthony Waters
Post:
This issue should be resolved in the latest version (0.24) available on BOINC.
25) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34342)
Posted 7 Dec 2009 by Anthony Waters
Post:
Version 0.24 has been published, it should reduce the apparent lag when running the CUDA application.
26) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34324)
Posted 6 Dec 2009 by Anthony Waters
Post:
The larger WUs increased the number of threads, I'll play with some of the settings to reduce the burden and publish 0.24 within the next 24 hours.
27) Message boards : Number crunching : Linux x64 CUDA app - HOWTO?.. (Message 34317)
Posted 6 Dec 2009 by Anthony Waters
Post:
Please try the new version, 0.23, I included libcudart.so.2
28) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34313)
Posted 6 Dec 2009 by Anthony Waters
Post:
The new version has been uploaded as 0.23 for Windows 32 bit and Linux/GNU 64 bit. It works for me on Linux/GNU 64 bit, but I was unable to test it with Windows (XP isn't too fond of the idea of having an ATI GPU and NVIDIA GPU in the same system).

Please report any issues.
29) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34311)
Posted 6 Dec 2009 by Anthony Waters
Post:
The memory in the GPU was not being initialized properly, I have to install Visual Studio on Windows so it may take a little longer than expected.
30) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34308)
Posted 6 Dec 2009 by Anthony Waters
Post:
The bug has been identified and fixed. It is currently going through testing and a new version should be up sometime within the next 48 hours (pending the results of the test, and it will most likely be within an hour, but I like to give myself a larger window for unforeseable problems). The new version also contains new performance enhancements that give a 5-10% decrease in running times.

Thank you for your patience.
31) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34272)
Posted 5 Dec 2009 by Anthony Waters
Post:
There appears to be something wrong with the way the application is compiled for the GPU when using larger WU sizes. It works correctly when running in emulation mode (meaning the GPU code is compiled for the CPU, and executes on the CPU).

Edit: It appears to be a bigger problem than I thought, the results actually change between running the application multiple times with using the same WU.
32) Message boards : Number crunching : Sudden mass of WU's finishing with Computation Error (Message 34268)
Posted 5 Dec 2009 by Anthony Waters
Post:
Is this still an issue?

If so please let me know how much Video RAM the graphics card has. The larger work units appear to be using 312MB of Video RAM.
33) Message boards : Number crunching : Server s/w update? (Message 32636)
Posted 22 Oct 2009 by Anthony Waters
Post:
It seems things have stagnated here lately. It would be nice to see some updates done for the project. Updating the server side BOINC code and producing a standard project application for ATI GPU's shouldn't be too difficult to accomplish.


The server side software upgrade has to be done by the individuals that manage the physical server that Milkyway@Home is hosted on, none of the Project Scientists have suffiecient priveleges to make that upgrade. I'll open up another communication channel with them in order to see if the ball can get rolling on the upgrade.

As for the ATI application, it is already on BOINC but it has been disabled pending the server side upgrade.
34) Message boards : Number crunching : cuda23 Computation error (Message 32506)
Posted 17 Oct 2009 by Anthony Waters
Post:
The issue has been fixed in version 0.21, thank you for your patience.

Anthony, any chance of the code being put in the code release directory? I don't want to have to remind you that the project -is- licensed under the GPL as per this post, but I'd really like to have a look at the code.


I've uploaded the last version, labeled as 0.21
35) Message boards : Number crunching : cuda23 Computation error (Message 32493)
Posted 17 Oct 2009 by Anthony Waters
Post:
The issue has been fixed in version 0.21, thank you for your patience.
36) Message boards : Number crunching : Defective WU (Message 32475)
Posted 17 Oct 2009 by Anthony Waters
Post:
I have resolved a similar issue with the 64 Bit Linux version, is this happening with the Windows version as well?

On a side note it will take a bit longer to fix the Windows version because I replaced the hard drive that had my Windows installation on it.
37) Message boards : Number crunching : CUDA Application Available for 64 Bit Linux/GNU (Message 32473)
Posted 17 Oct 2009 by Anthony Waters
Post:
Thanks for reporting the issue, I was able to get one of the 'broken' WU and fixed the issue that was occuring. The newest version 0.21 contains a fix, please report if it actually works (it worked for me).
38) Message boards : Number crunching : CUDA Application Available for 64 Bit Linux/GNU (Message 32331)
Posted 12 Oct 2009 by Anthony Waters
Post:
The CUDA application for 64 Bit Linux/GNU has been released on BOINC the 32 Bit version will follow soon. Please see http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=1083&nowrap=true#29742 for important information about the application. If Computation Errors are being experienced please make sure the BOINC client is from the 6.10.x series, the 6.6.x series has an issue relating to executing the CUDA client. With a GeForce GTX 285 that was donated from NVIDIA it takes about 2:55 with the work units being distributed.

Thanks to Crunch3r for pointing out the 6.10.x clients fixed the issues with the Linux/GNU CUDA clients.
39) Message boards : Number crunching : CUDA Application for 32 bit Windows (Message 31930)
Posted 3 Oct 2009 by Anthony Waters
Post:
But works on 260 gpu's that don't crunch gpugid anymore, happy!


Yea, great, more Windoze only crap. Anybody wanna buy a 2 month old XFX GTX-260.


There is an issue associated with executing CUDA applications through BOINC when using Linux/GNU. The application will execute correctly when run through a terminal, however, when BOINC fork+execs the application it will segfault within NVIDIA's driver [1].

[1] http://forums.nvidia.com/index.php?showtopic=105178&mode=linearplus
40) Message boards : Number crunching : CUDA Application Updated (Message 31548)
Posted 26 Sep 2009 by Anthony Waters
Post:
The CUDA application for 32 bit Windows has been updated with speed improvements, users should notice a 2x increase in performance.

Thank you to Brent from NVIDIA for assisting with making the application run faster on NVIDIA's hardware and also thanks to Cluster Physik for providing methods to also increase the performance.


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