When I leave my laptop for a couple of minutes and the CUDA task starts working, then I come back to work, it takes 50% of my cpu performance on my dual core cpu. Screen updates lag, so it is practically impossible to work.
In the boinc manager I see that the GPUGRID task still takes cpu time.
When I suspend the task manually, it still continues running.
The only thing that helps is to shutdown the boinc manager. That stops all tasks and I can work normally again.
Any idea what goes wrong or what I can do make this work? Is there any additional info that can help you?

If you would like some help, We will need more information (os, gpu etc) on your system, and the BOINC and nVidia driver version you are using.



Sadly, Other people (most likely from the Public Relations Dept...) will be around shortly that will not need that information, as they will most likely just be telling you that 'their' system runs fine, and they are racking up credits like crazy, and it's too bad you have a problem...


Disclaimer: The opinions expressed here are the views of the writer and do not necessarily reflect
the views and opinions of the GPUgrid project, or any of the volunteer members that have already posted....

____________


Consciousness: That annoying time between naps......

Experience is a wonderful thing: it enables you to recognize a mistake every time you repeat it.

Not sure if I belong to the public relations department or not ... :)

But ...

There are many issues with CUDA and BOINC... the major one is that it is new ... and being new, there are problems ... this is another ...

The first part is probably because you are running windows (XP or Vista) and there is a problem in the 6.55 application that takes more CPU than it should.

The second half of your problem is one of controls on the CUDA execution and that is a new one ...

I did post the following on the BOINC Dev mailing list:

On the GPU Grid board the following was posted:

When I leave my laptop for a couple of minutes and the CUDA task starts working, then I come back to work, it takes 50% of my cpu performance on my dual core cpu. Screen updates lag, so it is practically impossible to work.
In the boinc manager I see that the GPUGRID task still takes cpu time.
When I suspend the task manually, it still continues running.
The only thing that helps is to shutdown the boinc manager. That stops all tasks and I can work normally again.


Which is indicating an additional problem with the control of tasks running on the GPU. These tasks are apparently not correctly suspending when so directed by the BOINC Manager. It is possible that the stopping of BOINC is short-stopping the suspension of the task and that had the participant waited the suspension would have occurred at the next interaction between the BOINC Manager and the CUDA processor.

But, waiting the next CPU to GPU interaction is not a proper behavior for the suspend which should be immediate. I am not sure if checkpointing and CPU to GPU interaction to save the state should occur or even if the GPU should be cleared.

Perhaps others (John) might have a better perspective on this than I ...

When I leave my laptop for a couple of minutes and the CUDA task starts working, then I come back to work, it takes 50% of my cpu performance on my dual core cpu. Screen updates lag, so it is practically impossible to work.
In the boinc manager I see that the GPUGRID task still takes cpu time.
When I suspend the task manually, it still continues running.
The only thing that helps is to shutdown the boinc manager. That stops all tasks and I can work normally again.
Any idea what goes wrong or what I can do make this work? Is there any additional info that can help you?

The BOINC Manger version 6.5.0 is no faster than your version. It only has a fix that mainly seems to ease the ability to run a CUDA task along with the CPU tasks.

The faster application, which has really similar numbers is the GPU Grid application 6.56 which was pulled because of a bug and the project is trying to get a new version out "real soon now" as Jerry Pournelle used to day ( for those that used to read Byte Magazine ... I know, I am dating myself) ...

Anyway, getting that application will be automatic when it is released ... you will not have to do anything ...
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Thank you, Paul D. Buck, for your quick answer.

Thank you, Paul D. Buck, for your quick answer.

and someone that has the ability to open a Trak ticket might hopefully enter something along this line there ...

I'll wait and see what BOINC 6.6.0 offers. Windows version is due out tomorrow.

The one thing they have mentioned so far is it addresses trak #808, which is to do with leaking thread handles.

The problems I writed about in a prior post were using 6.5.0 WUs. Now I'm crunching my second 6.55 WU without problems. I have paused them several times with an inmediate reacction from the boinc manager. It seams that the works are done in less time (though my ultra-slow system).
Another good thing for my slow system. Half an hour ago, the server sent a message saying that it will not send me a new work because I will not finish it on time. This is true and will avoid receiving a work that I have to suspend, with the problems I had with that issue before.
Besides that, what is more important, they are the first two WU that I recieved automatically, without having to suspend GPUGRID proyect and resume it manually. This increases the GPUGRID work done, releves me from me the "babysitter" work.

I am ager to see the performance of my machine with v6.60, but I imagine that have to wait untill I finish the GPUGRID WU I'm working on; an eternity (33 hours, more o less).

Strange. I am running cuda v6.62 (acemd_6.62_windows_intelx86__cuda.exe) and I'm experiencing the same problem: the task keeps running and consumes all my gpu-power.

I'm running on a Core2 Duo @ 2.53GHz and a Nvidia GeForce 9800M GTS.
My operating system is Vista Ultimate 64bit.

The only way to stop the cudo task is to stop the BOINC manager, thereby terminating the BOINC server app.

Strange. I am running cuda v6.62 (acemd_6.62_windows_intelx86__cuda.exe) and I'm experiencing the same problem: the task keeps running and consumes all my gpu-power.

It is indeed the fact that cuda does not suspend its work when i'm active and continues taking up almost all the gpu resources.
I've seen that eventually it does suspend, but it can take several minutes (more than 10) before that happens. I haven't verified but it might well be that it suspends when the active WU is finished.

My version of boinc is 6.4.5 on Vista x64.