pycuda - Why is my rather trivial CUDA program erring with certain arguments? -


I have created a simple CUDA program for practice. It only copies data from one array to another: 

  Import pycuda.driver as cuda import pycuda.autoinit as import numpy as np from pycuda.compiler Import SourceModule # Global Constant N = 2 ** 20 # Array size aa = np.linspace (0, 1, N) e = np.empty_like (a) block_size_x = 512 # Instant block and grid size Block_size = (block_size_x, 1, 1) grid_size = (N / block_size_x, 1) # Create the CUDA kernel, and run it. Mod = SourceModule ("" "__global__ zero D2x_kernel (double * A, double * E, int n) {int tid = blockDim.x * blockIdx.x + threadIdx.x; if (tid> 0 & amp; Amp; & amp; amp; amp; amp; amp;; - N - 1) {e [tid] = one [tid];}} "" "funk = mod.get_function ('D2x_kernel') func (a, cuda.InOut (e) , Np.int32 (N), however, I get this error:  pycuda._driver.LogicError: cuLaunchKernel failed: invalid value     / P> < P> When I get rid of the second logic in my kernel function  double * e  and without any logic  e  call the kernel, the error goes away What is the meaning of this error?   
 
 
 Your  a  array device Does not exist memory, so I suspect that PyCUDA is ignoring the first argument for your kernel setting (or otherwise handling) and only going through  e  and  N  ... so that you get an error because the kernel was expecting three arguments and it only got two. You can eliminate the error message you receive by removing  double * e  from your kernel definition, but your kernel will still not work properly.  
 There should be a quick fix on this: Wrap the call  a  cuda.In () , which is  a , that should be your kernel launch line:  
  func (cuda.In (a), cuda.InOut (e), np. Int32 (n), block = block_size, grid = grid_iis)   
 Edit: Also, do you know that your colonel  a  to  e  is not copying the first and last elements? If your  if (TID> 0 & amp; amp; amp;; & lt; N - 1)  statement is stopping it for the entire array, it should be  (if & Lt; N) .

Comments

Post a Comment

Popular posts from this blog

java - NullPointerException for a 2d Array -

नक्शा = नया बफर्ड इमेज [चौड़ाई] [ऊंचाई]; के लिए (int i = 0; i & lt; height; i ++) {for (int j = 0; j & lt; चौड़ाई; j ++) {if (charMap [j] [i] == पर्वत। इंडेंटफार्म) {if (j + 1 & lt ; चौड़ाई और amp; amp; j-1 & gt; = 0) {if (charMap [j-1] [i]! = पर्वत। इंडेंटिफ़ायर & amp; amp; & amp; amp; charMap [j + 1] [i]! = पर्वत। इंडेंटफार्म) {नक्शा [जे] [आई] = टाइल ग्रिड [1] [10]; }} और {नक्शा [जे] [आई] = टाइल ग्रिड [8] [10]; }}} यह कोड है जिसे मैं सेल के चारों ओर प्रत्येक टाइल को चेक करके 2 डी सर की जांच करने के लिए उपयोग कर रहा हूं लेकिन मुझे लगता है कि किसी को भी सोच रहा हूँ मदद कर सकता है? मुझे संदेह है कि आपको NullPointerException को charMap [j] से प्राप्त हो रहा है [ I] == पर्वत। इंडेंटिफ़ायर लाइन। सुनिश्चित करें कि आप ज्योफ द्वारा सुझाए गए दोनों मानचित्रों के लिए आंतरिक सरणियों को प्रारंभ करते हैं।
Read more

python - Assemble mpeg file unable to play in mediaplayer -

I am currently working on a school project and I think that is to gather some problems with the MPEG file I The scope of my project is: 1) Split the MPEG file into pieces of many fixed sizes. 2) Collecting some of them and leaving some part. Problem 1: When I run the file in the media player, it will play the video until it reaches that segment which I left Give it Example: Chunk = ["yui_1", "yui_2", "yui_3", "yui_5", "yui_6"] Duration of each segment: 1 second * If you think I have left the "yui_4" section. * If I went to collect all the parts except "yui_4", then the video will play the first 2 seconds before being hanged throughout the period. Problem 2: When I gather the first part off the part, it is unable to run the full MPEG file is. Duration of each piece: 1 second Example: wheel = ["yui_2", "yui_3", "yui_4", "yui_5", "yui_6"...
Read more

c# - NameSpace Manager or XsltContent to parse aspx page -

How can I use the namespace manager or XSLT content to parse the aspx page? I am using HtmlAgilityPack I am trying to parse the aspx page to get the button and label control ID. When I try to select a node with the asp: button element, I get the following error Here is the error message: Namespace Manager or XsltContext is required This query contains a prefix, variable, or user-defined function. HtmlAgilityPack.HtmlDocument htmldoc = new HtmlAgilityPack.HtmlDocument (); String filePath = @ "C: \ webform4.aspx"; Htmldoc.load (filepath); Foreach (html.doc.DocumentNode.SelectNodes ("// div") in HtmlNode div) {Response.Write (div.Id); HtmlNode ASP ("asp: button") in foreach (div.SelectNodes) {Response.Write (asp.Id); }} My aspx page looks like: & lt;% @page language = "c #" autoevolutionwireup = "true" codebahind = "Webform 4 Aspx.cs" Inheritance = "WebApplication 1.WebForm4"%> & Lt ;...
Read more