C# :: Performance Counter Raw Value Is Not Changed / Modified
Apr 6, 2015
I am trying to modify a PerformanceCounter I have created in C#. But it doesn't seem to be that it is being changed. This counter needs actualy to be a flag : 0 or 1.
I took the following code from the web. It created the collectors category along with the counters well. But the RawValue always shows 0!
I am working on Win7/64.
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace PerformanceCounterSample
[Code] ....
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Aug 16, 2014
I have started to move over to using Unicode, wide character null-terminated strings in my Windows programmes. Accordingly I set the Use Unicode Character Set Visual C++ compiler option. It is my understanding that once you do that the many macros which determine whether you transparently call ...A() or ...W() API functions automatically shift over to calling the wide character variants. As this is a compiler directive, all the choices are made and hardcoded in to the resultant executable at compile/link-time BEFORE it is ever run. Therefore using for example the macro OpenFileName() in the source code instead of specifically calling OpenFileNameW() has no impact on run-time performance.
The next logical step, instead of explicitly using wchar_t is to declare null-terminated string character arrays as TCHAR*. Then, so long as I also employ the tcn... variants of CRT string functions and call TEXT() or _T() macros to create string literals the preprocessor will chose, again transparently whether to create an executable using standard multibyte or unicode wide characters - and their associated functions - all determined by the Use Unicode Character Set switch. That way I can cover both eventualities with the same source code.
So, with all that - I THINK!!! - properly under by belt, I am fairly sure that using TCHAR and its friends will not effect run-time performance at all. However, in his otherwise excellent article the author makes it sound as if using Unicode EXPLICITLY through wchar_t, ...W() API functions and tcn... CRT calls is faster than the TCHAR alternative.
At the end of the day my question is - have I got the right end of the stick; TCHAR makes no difference to executable performance?
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Feb 13, 2013
I have gotten it to record the date and I can printf it either on the same function, or in the main(). However, one of the requirements I must adhere to is to printf the statement in a brand new function, but when I do that, it just doesn't work. Heres what I mean:
Code:
#include <stdio.h>
#define TICKER "LRCX"
#define INVESTMENT_AMOUNT "10,000.00"
//Prototypes
int getdate(int* month1,int* day1,int* year1,int* month2,int* day2,int* year2);
float getprice(float* BPrice, float* SPrice);
void printdate(int month1, int day1, int year1);
}
[code]....
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Nov 11, 2014
I have the following code:
class Element {
public:
..
virtual unsigned NumberOfNodes() = 0;
[Code] ....
Is it possible to implement this better? All the element stuff can be static, but this is not possible with the abstract class. I want to have Mesh independent of a specific element. With the code above, if I have multiple meshes I have one instance of an element, e.g., Triangle for each mesh. Although they are all exactly the same.
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Apr 22, 2014
I have uploaded the entire project file.
you just need to open the prac 4 project file.
Now I have answered the prac question by adding a new add method. and a getPriority method.
All the other code was skeleton code and i was told it should work flawlessly.But it does not.
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Mar 24, 2013
Variably modified types are subject to certain restrictions , just as variable-length arrays are. The most important restriction is that the declaration of a variably modified type must be inside the body of a function or in a function prototype.
Code:
void f(int m , int n) {
int a[m][n] , (*p)[n];
p=a;
//....
}
What does it mean? That we can't declare such a pointer as a global variable?
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Aug 30, 2014
How to create text file in C programming. And after some changing in that text file off the running code of C, I want to read that modified text file back in C running code. e.g
Created file may have number 1, after changing this value to 2 let say, than I want to read that 2 value which is in text file.
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Oct 2, 2013
Let's assume "person" is a class that has a member "age", and personptr is a pointer to a person object.
doStuff(personptr->age);
doMoreStuff(personptr->age);
andSomethingElse(personptr->age);
andSomethingElse(personptr->age);
Is this bad for performance? Is the following better or doesn't it matter?
int person_age = personptr->age;
doStuff(person_age);
doMoreStuff(person_age);
andSomethingElse(person_age);
andSomethingElse(person_age);
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Aug 16, 2012
Here's what I'm trying to do : A simple readout that shows the input/feedback values for 10 different sensors (i.e. a motor, a thermocouple, light sensor, etc).
What I got so far:
The data is stored in 2 different arrays:
One array is a 2D string array that stores descriptions, and won't be changed:
Sensor ID, Sensor Type, Input Signal, Feedback Signal
["A"]["Motor"]["PWM Signal"]["RPM"]
["B"]["Thermocouple"]["N/A"]["TempC"]
etc
The second array is another 2D int array that stores all the data values:
Input Signal, Feedback Signal
[0][0] // for Sensor A, Input is 0 PWM, 0 RPM read from sensor
[0][25] // for Sensor B, Input is 0, 25C read from sensor
etc
My question: I'd like to re-write the code to incorporate the new things I learned in c++. Right now, the descriptions for all 10 sensors are in 1 array and the sensor values are in another array. If I use pointers to access the values, is there a performance difference between:
1. Keeping it as is, with 2 2d arrays
2. 1 big structure that has descriptions and sensor values for all 10 sensors (i.e. combining everything into 1)
3. 1 parent class, and 10 different objects for each sensor (i.e. splitting into 10)
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Feb 3, 2013
"C++ is a general-purpose programming language." I have to find the word "C++" and replace it with "Java" and then capitalize all letters.
#include <iostream>
#include <string>
using namespace std;
int main( ) {
string origin; //contains input string
string replace; //the string obtained by replacing "C++" with "Java"
[Code] ....
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Dec 5, 2014
I'm still at the very beginning of learning WPF and there are still countless things i don't fully understand. For instance, as I can see in my WPF project, there isn't an event that would fire when the Background property of some control is changed. Or am I just missing it? If i'm not blind after all, and it really doesn't exist, is there any way i could get notified when the Background color of some control is changed?
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Oct 13, 2014
cout << "this is a sample text " << endl << endl;
int t;
t = endl+endl; ?
looking for a single endl define to end line twice.
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Oct 28, 2014
I am not 100% confident that changing the existing interfaces will not be error-prone. Should I discard the new changes for ease of use or Adapt to new changes but having a higher risk of introducing new bugs?
old
Code:
///ContactResultCallback is used to report contact points
structContactResultCallback {
short intm_collisionFilterGroup;
short intm_collisionFilterMask;
[Code] ....
New:
Code:
///ContactResultCallback is used to report contact points
structContactResultCallback {
short intm_collisionFilterGroup;
short intm_collisionFilterMask;
[Code] ....
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Nov 21, 2013
I am working on this project where I need to see if data in a struct has changed and if so I need to do something. With that being said, is there a way to check to see if data in a struct has changed. My first approach was to make a copy of the struct and compare the original struct with the copy but I was having problems with the operator==.
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Feb 24, 2015
Im trying to create a Personchanged EventHandler..
I have this:
public class Pessoa {
private int _idade;
private bool _isDeleted;
public Pessoa() {
// TODO: Complete member initialization
[Code] ....
And I have a error: Delegate EventHandler does not take 0 arguments..
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May 13, 2014
I have an school assignment that asks me to measure the most famous sorting algorithms for performance in terms of number of steps and CPU running time. ( Here I'm testing for running time)
I decided to test for bubble sort first:
#include <iostream>
#include <ctime>
using namespace std;
void bubbleSort(int ar[], int size) {
int temp;
[Code] ....
So basically what I want to know is:
1. Is this clock function giving the correct CPU running time?
2. Is there any way to write code that would measure the number of steps for each algorithm?
3.I need to test it for number of integers=100 then 200, then 300... Well you get my point, and I don't want to have to actually input 200 numbers with my keyboard. Is there any way to generate as many entries as I want?
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Aug 6, 2012
I have a Gridview ,in that one of the Column is DropDownList .I have 10 Records in my Grid and my DropDown Values are like this 1,2,3....10.This is the format to store my DropDown values ,if i delete 4th Row ,then my DropDown Values are Changed like 1,2,3,4....9.This is my task ,but i'm getting this format 1,2,3,--,5...10.
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Mar 22, 2013
I am posting this simplified piece of code that is a bit confusing for me. There are two functions that I call. One shows the expected results but the result of the other one rather puzzles me.
//#define defineVecTyp Vec3f
#define defineVecTyp float
template <typename vecTyp>
vecTyp buildLaplacianPyramid(cv::Mat inputmat) {
vecTyp lapPyr;
[Code].....
Calling the function sum1 does not change the values stored in the variables val1 and val2. The output of the program is as follows:
val1= 1 ## val2= 10 // before the call of function sum1
val1= 1 ## val2= 10 // after the call of function sum1
sumOfVals= 22
This is quite obvious and as expected and I just pasted this piece of code as an example for better clarification.
However, if I call the function buildLaplacianPyramid and apply a function for Gaussian Blurring, this also effects the cv::Mat passed to the function. The line imshow("M1, after buildLaplacianPyramid",M1); therefore shows an image that is blurred. Since I am not passing a pointer to the cv::Mat I do not understand why this should be happening. I was assuming that there would be a copy of the cv::Mat M1 to be used within the function. Therefore I was expecting the cv::Mat M1 to retain its original value. I was expecting that all changes applied to cv::Mat inputmat within the function would not have any influence on the cv::Mat M1. Just like in my other example with the sum.
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Apr 27, 2013
How do I add a counter for the comparisons so that it increments every time the two array value are compared?
// Session5.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
using namespace std;
const int NMAX =10;
[code].....
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Jul 30, 2014
int counter won't reset to 0 when I click the start over button.
protected void startOverButton_Click(object sender, EventArgs e)
{
gameOverLabel.Visible = false;
[Code]....
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Feb 17, 2015
I am not sure why this is happening but I am simply trying to make rounds with my code and have it stop when one of two things, or both, happen.
#include <iostream>
#include "Classes.h"
#include "RNG.h"
#include "select.h"
#include "Fitnesschk.h"
using namespace std;
/*Global Variables************************************/
const int column = 32;
[Code] ....
I've tried resetting and renaming all variables but I don't see any conflict. I tried declaring in different areas but no dice. The other issue I have is that fittest always returns 0 even if the function returns 1. So it infinitely loops. When I go through looking at the variables. the fittest variable never changes even if the function returns 1 and round seems to reset after reproduce is called.
Here is the supporting code.
For Fittracker:
int fittracker(person man[], int row, int column){
for (int y = 0; y < row; y++){
int fit = 0;
for (int z = 0; z < column; z++){
if (man[y].data[z] == 1){
[Code] ....
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Apr 14, 2013
One that fills different char arrays the idea is to use a single char to represent a char such as 255 but if more than it then use a char array of two chars to represent the next char 00 because if only one is needed it would take less disk space than 0,255 as it would in an array.
My goal is to do this all the way up to an array that can hold 255,255,255,255 but only use the more complex array if needed Example: a char of 255 takes much less space than a char array of 4 chars so that instead of 0,0,0,255 it is written to disk as a single char whereas a char array of 200,0,0,1 would be written as a 4 byte char array. use single char to represent values from 0 to 255 use two char array to represent 0,1 to 255,255 three for 0,0,1 to 255,255,255 and four for 0,0,0,1 to 255,255,255,255
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Jun 18, 2013
I am trying to make a program which reads a text file, separates the strings into words, then finally saving and counting each different word.
When I comment out the code where it is supposed to search for the same word in the table, the program doesn't work.Am I doing something wrong with strcmp or the loop? The 'break' just exits out of that 'for' loop right?
Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define WORD_MAX 500
#define LIST_MAX 500
int main(){
int i, j, find;
[Code]...
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Oct 14, 2014
I'm trying to write a small brute force application in C on Ubuntu 14.04.1 using Code::Blocks with gcc-4.8.2. It's nothing special and just for practice.The focus is on a parallel procedure that generates strings by use of OpenMP. Every time a string is generated, the counter variable should be incremented. At the end, regardless of whether the search string was matched or not, it outputs the correct number of all generated strings (counts).It works fine so far.Here is my source code example:
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <omp.h>
/* Global variables */
const char Literals[] = "abcdefghijklmnopqrstuvwxyz";
const int NLiterals = sizeof( Literals ) - 1; // NLiterals = 26 Bytes.
const char SearchString[] = "test"; // I.e. until 'test' there are 355414 counts.
char MatchString[16];
}
[code]...
This should speed up the process of generating strings. But if I do so, always when the program has a match the number of counted strings is wrong. Here are some possible "wrong" outputs: Code: Match: 'test'! 40710 tries. <-- number of tries (counts) is wrong! or Code: Match: 'test'! 40375 tries. <-- number of tries (counts) is wrong! But if the program doesn't have a match (i.e. when I change SearchString to something like the following line), then the number of counts is correct: Code: const char SearchString[] = "test0"; The only thing I have to do before, is to change the follow line from:
Code:
printf( "
No match! %u tries.
", Count / 8 ); to Code: printf( "
No match! %u tries.
", Count );
But also it can happen that there is no output. Like an infinite or endless loop. How can I improve the source code in order that the correct number of counts is always displayed and what can be the reason for the endless loops time after time? Both issues appears only by the use of Code: #pragma omp for schedule( dynamic ).
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Jan 2, 2014
The program should be print the numbers 0 through 10, along with their values doubled and tripled. The data file contains the necessary variable declarations and output statements.
Example the output:
Single Double Triple
1 2 3
2 4 6
3 6 9
4 8 12
here my code tell me if correct
#include <iostream>
#include <cstdlib>
using namespace std;
int main () {
int x, double, triple;
[Code] .....
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Oct 4, 2014
I need to get up to speed in Embedded systems. I need to create a 3led binary counter, when an input is operated the it needs to count up using these leds from 0 to 7. I have written this so far and how to pulse a counter or interger to 7 and then reset back to 0.
int main (void) {
LED_Init_1();
LED_Init_2();
LED_Init_3();
[Code]......
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