Cuda program results are always zero in HW, correct in EMU??

Posted by Orion Nebula on Stack Overflow See other posts from Stack Overflow or by Orion Nebula
Published on 2010-05-20T23:29:04Z Indexed on 2010/05/20 23:30 UTC
Read the original article Hit count: 243

Filed under:

cuda

|

result

|

zero

|

memory

|

copy

Hi all!

I am having a weird problem .. I have written a CUDA code which executes correctly in emulation and all results show up.. however, when executed on hardware "G210" .. the results in the result memory are always 0

I am passing two vectors to the kernel, one with random variables the other is initialized to zero, the code copies the first vector to shared memory, does some swapping and other operations and then writes back the results on the second vector (the one with the initial 0's)

I am using double precision, the -arch sm13 flag is used, all memory allocation also use sizeof(double) ..

I have checked if the kernel is invoked, it does .. so no problems here .. the cudaMemCpy has no problems ..

what could be the problem .. :( why would it work in emulation but not on HW

I am quite confused .. any ideas?

© Stack Overflow or respective owner

Related posts about cuda

CUDA Driver API vs. CUDA runtime

as seen on Stack Overflow - Search for 'Stack Overflow'
When writing CUDA applications, you can either work at the driver level or at the runtime level as illustrated on this image (The libraries are CUFFT and CUBLAS for advanced math): I assume the tradeoff between the two are increased performance for the low-evel API but at the cost of increased… >>> More
Updating a Cuda 4.0 project to Cuda 4.2

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a VS2010 project that was tested with CUDA 4.0, today I installed CUDA 4.2 and I want to update this project, the problem is that when I try to run the project it asks me for cudart32_40_17.dll, but since this is CUDA 4.2 I only have on my folders (C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v4… >>> More
How to solve CUDA crash when run CUDA example fluidsGL?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I use ubuntu 12.04 64 bits with GTX560Ti. I install CUDA by following instruction: wget http: //developer.download.nvidia.com/compute/cuda/4_2/rel/toolkit/cudatoolkit_4.2.9_lin ux_64_ubuntu11.04.run wget http: //developer.download.nvidia.com/compute/cuda/4_2/rel/drivers/devdriver_4… >>> More
Context migration in CUDA.NET

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm currently using CUDA.NET library by GASS. I need to initialize cuda arrays (actually cublas vectors, but it doesn't matters) in one CPU thread and use them in other CPU thread. But CUDA context which holding all initialized arrays and loaded functions, can be attached to only one CPU thread. There… >>> More
CUDA on GeForce 8600GT

as seen on Super User - Search for 'Super User'
I have got the cuda driver, toolkit and sdk installed in Ubuntu 10.04. I'm using nVidia Geforce 8600 GT card. Official website says my card is CUDA supported. But on running the deviceQuery that comes with the cuda sdk, I'm getting the following output. ./deviceQuery Starting... CUDA Device Query… >>> More

Related posts about result

Unable to transfer data to or from mounted hard drive

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
So usually i'm good at sorting out issues. But this one has me at a loss! This issues has occured since upgrading my ubuntu so this was workingg prior. I use mounted hard drives to manage my downloads which are then copied over accordingly by a python based app. I found it was having issues with… >>> More
Webservice Return Generic Result Type or Purposed Result Type

as seen on Programmers - Search for 'Programmers'
I'm building a webservice which returns JSON / XML / SOAP at the moment.. and I'm not entirely sure which approach for returning results is best. Which would be a better return value? A generic "transfer" type structure, which carries Generic properties or a purposed type with distinct properties:… >>> More
A Nondeterministic Engine written in VB.NET 2010

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
When I'm reading SICP (Structure and Interpretation of Computer Programs) recently, I'm very interested in the concept of an "Nondeterministic Algorithm". According to wikipedia: In computer science, a nondeterministic algorithm is an algorithm with one or more choice points where multiple… >>> More
Join Query returns empty result, unexpected result

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello all, Can anyone explain why this query returns an empty result. SELECT * FROM (`bookmarks`) JOIN `tags` ON `tags`.`bookmark_id` = `bookmarks`.`id` WHERE `tag` = 'clean' AND `tag` = 'simple' In my bookmarks table, I have a bookmark with an id of 70 and in my tags table i have two tags 'clean'… >>> More
Turn Function or Stored Procedure Result into "live" Result for LINQ

as seen on Stack Overflow - Search for 'Stack Overflow'
Is it possible to turn result sets obtained in LINQ through a stored procedure or function call into a "live" set of objects of which I can retrieve Foreign Key related objects? If, for example, my stored procedure returns a set of rows (= LINQ objects) of type "Contact", then I can't seem to obtain… >>> More