Hi Leandro, Without knowing exactly what examples you're running, it may be hard to say what the problem is. In fact, you may not really have a problem.
How much work is being done in each example program? Is it enough to really work the GPU, or is communication and other overhead dominating runtime? Note that laptops may have lower communication latency over the PCI bus than desktops/servers, which can make small programs run much faster on laptops regardless of how much processing power the GPU has. Have you tried running the sample code from the SDK, so that you can verify that it's not a code problem? Regards, Brendan Wood On Sun, 2012-07-29 at 23:59 -0300, Leandro Demarco Vedelago wrote: > Hello: I've been reading and learning CUDA in the last few weeks and > last week I started writing (translating to Pycuda from Cuda-C) some > examples taken from the book "Cuda by Example". > I started coding on a laptop with just one nvidia GPU (a gtx 560M if > my memory is allright) with Windows 7. > > But in the project I'm currently working at, we intend to run (py)cuda > on a multi-gpu server that has three Tesla C2075 cards. > > So I installed Ubuntu server 10.10 (with no GUI) and managed to > install and get running the very same examples I ran on the single-gpu > laptop. However they run really slow, in some cases it takes 3 times > more than in the laptop. And this happens with most, if not all, the > examples I wrote. > > I thought it could be a driver issue but I double-checked and I've > installed the correct ones, meaning those listed on the CUDA Zone > section of nvidia.com for linux 64-bits. So I'm kind of lost right now > and was wondering if anyone has had this or somewhat similar problem > running on a server. > > Sorry for the English, but it's not my native language. > > Thanks in advance, Leandro Demarco > > _______________________________________________ > PyCUDA mailing list > [email protected] > http://lists.tiker.net/listinfo/pycuda _______________________________________________ PyCUDA mailing list [email protected] http://lists.tiker.net/listinfo/pycuda
