measurement

问题 Is it possible to measure amount of memory being released after the object being terminated by destructor. I'm trying to check whether resources are properly managed. For example, I've written an implementation of the LinkedList and testing it: int main(int argc, char** argv) { //check point for initial memory int64_t init = ??? ; //next points of measurement int64_t point_a, point_b; List<int> list; list.push_back(5); { List<double> l; l.push_back(-0.12); l.push_back(1.6); // ... do

问题 Let's say I have a python script script.py and I want to measure the execution time of it just as if I put the whole script in quotation marks and used: from timeit import Timer t = Timer(stmt='THE WHOLE SCRIPT') print(t.timeit()) I could do this by editing script.py , but I'd like not to. What I want is a second script measure.py , which can be executed like ./measure.py script.py , which will basically do the above with any script as an argument. How could I approach writing such a script

问题 Im trying to measure correctly the times of parallel and sequential executions, but I am in doubt because of: Suppose we have the following code: //get the time clock_t start,finish; double totaltime; start = clock(); double *d_A, *d_B, *d_X; cudaMalloc((void**)&d_A, sizeof(double) * Width * Width); cudaMalloc((void**)&d_B, sizeof(double) * Width); cudaMalloc((void**)&d_X, sizeof(double) * Width); cudaMemcpy(d_A, A, sizeof(double) * Width * Width, cudaMemcpyHostToDevice); cudaMemcpy(d_B, B,

问题 I benchmarked my Rust project with cargo bench and see many numbers on the results... What do they mean? 2 tests test bench_few_core ... bench: 26,249,920 ns/iter (+/- 2,836,381) test bench_one_core ... bench: 6,087,923 ns/iter (+/- 752,064) For example for test bench_few_core , I see: number 1 = 26 number 2 = 249 number 3 = 920 number 4 = 2 number 5 = 836 number 6 = 381 What do they all mean? I thought there should be 2 numbers per test: math expectation (or mean) and standard deviation. 回答1

问题 I have a project that dynamically loads in unknown assemblies implementing a specified interface. I don't know the contents or purposes of the assembly, other than it implementing my interface. I need to somehow restrict the amount of processing power available to these assemblies. Processor priority is not what I'm looking for. I can't use a stopwatch and assign a certain amount of time for the assembly to run as the server might be arbitrarily busy. Optimally I'd like to specify some

问题 The Text Object holding a string (in a specified font) seems to give inconsistent results depending on the length of the string. For example: from Tkinter import * import tkFont root=Tk() t_Font = tkFont.Font(family='Helvetica', size=12, weight='bold') t_text='New.' t_frame = Frame(root, bd=0, height=10, width=t_Font.measure(t_text)) t = Text(master=t_frame, height=1, width=len(t_text), bd=1, font=t_Font, padx=0 ) print '\n\nMeasured:',t_Font.measure(t_text),'Frame req:',t_frame.winfo

问题 I'm working with a geographic point using lat/long and need to find other points in our database within a 5 mile radius of that point. However, I can't seem to find out what the "units" are for STBuffer, it doesn't seem to conform to feet, miles, meters, kilometers, etc. The documentation only refers to them as "units", any suggestions? Thanks [...] from geography::STGeomFromText('POINT(x y)', 4326).STBuffer(z).STIntersects(geography::STGeomFromText('POINT(' + CAST(v.Longitude as varchar(max)

问题 There seems to be a bit of an issue with two grids containing elements specified in a certain way, and the SharedSizeGroup. This question is in response to an earlier question from user D.H. I attempted to answer. Forgive the length, but it helps to demonstrate the problem visually. His original question asked why two grids with a SharedSizeGroup didn't resize to the same height when certain conditions were met (resizing a TextBlock in the right-side grid). I took his example and expanded it,

问题 Due to security limitations at work, I am not allowed to install Chrome extensions. Chrome has a ruler built in to the developer tools, but I can't figure out how to define start and end points like a ruler would permit. Are there any tools or techniques for measuring pixels that don't require installing a Chrome extension? 回答1: You could create your own ruler functionality and paste it into the console. Here's a basic example: var fromX, fromY; var svg = document.createElementNS ('http://www

问题 What libraries or functions need to be used for an objective comparison of CPU and GPU performance? What caveat should be warned for the sake of an accurate evaluation? I using an Ubuntu platform with a device having compute capability 2.1 and working with the CUDA 5 toolkit. 回答1: I'm using the following CPU - return microseconds between tic and toc with 2 microseconds of resolution #include <sys/time.h> #include <time.h> struct timespec init; struct timespec after; void tic() { clock_gettime