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How “real-time” are the FIFO/RR schedulers on non-RT Linux kernel?

一世执手 提交于 2021-02-20 03:44:55
问题 Say on a non-RT Linux kernel (4.14, Angstrom distro, running on iMX6) I have a program that receives UDP packets (< 1400 bytes) that come in at a very steady data rate. Basically, the essence of the program is: while (true) { recv( sockFd, ... ); update_loop_interval_histogram(); // O(1) } To minimize the maximally occuring delay time (loop intervals), I started my process with: chrt --fifo 99 ./programName setting the scheduler to a "real-time" mode SCHED_FIFO with highest priority. the CPU

Get response link from HTTP request on Powershell

不羁的心 提交于 2021-02-20 03:44:46
问题 The following Powershell script runs a Google search of an image stored within my hard drive. How can I get the link which is followed to get to the results page? Is it possible to navigate to the different webpages displayed on it? I've tried $request.Links | Select href to try and get a list of the links, but it didn't work. I've also tried to add Write-Output $respStream to the code, but then it doesn't run. Set-ExecutionPolicy Bypass -scope Process -Force function Get-GoogleImageSearchUrl

What is the java keyevent field for question mark? [closed]

若如初见. 提交于 2021-02-20 03:44:34
问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 9 years ago . Is there any event for pressing ?, such as keyPress(KeyEvent.VK_?) in Java? 回答1: From http://docs.oracle.com/javase/6/docs/api/java/awt/event/KeyEvent

SC start service in folder /Start in:/

主宰稳场 提交于 2021-02-20 03:44:21
问题 I am solving one problem. I am trying to create a service for a program, but the .exe file has to be run in specific folder /File Properties - Start in/. Is there any way how to add ,,Start in,, to service? All services runs from C:\Windows\System32 .. and this one I want to run from C:\WinACD sc create WinACD binpath= "C:\WinACD\WTELS.EXE Z" start= auto I have to change working directory: C:\WinACD Thank you all, Robert 回答1: In the end I downloaded a program, which works perfectly for my

iOS - Streaming and receiving audio from a device to another ends in one only sending and the other only receiving

耗尽温柔 提交于 2021-02-20 03:44:18
问题 My app is basically a phone call over MultipeerConnectivity. Here is how I'm setting up the audio session: Note that recordingSession is of type AVAudioSession and captureSession is of type AVCaptureSession. func setupAVRecorder() { print("\(#file) > \(#function) > Entry") do { try recordingSession.setCategory(AVAudioSessionCategoryPlayAndRecord) try recordingSession.setMode(AVAudioSessionModeVoiceChat) try recordingSession.setPreferredSampleRate(44100.00) try recordingSession

Compare tf.string and python string

≯℡__Kan透↙ 提交于 2021-02-20 03:43:45
问题 How can I compare a Tensorflow string tensor to a python string type. I tried something like this if(tf.constant("neg",tf.string) in key): a=True key here, is a tf.string. I want to see if 'neg' is in the key tensor. 回答1: Unfortunately, currently you cannot. Please ask this on TF github in issues section. 来源: https://stackoverflow.com/questions/35946810/compare-tf-string-and-python-string

Iterate through nested list with many layers

烂漫一生 提交于 2021-02-20 03:43:42
问题 Consider the scenario where you have a collection, and inside that collection are particular objects. Those objects also hold a collection, and inside those collections are more of the same objects. It's a nested collection with many layers. List<WorkItemClassificationNode> items; List<WorkItemClassificationNode> subItems = items.Children; List<WorkItemClassificationNode> subSubItems = subItems.Children; // etc I just want a method to iterate through each of those layers so the same logic is

Custom reduction on GPU vs CPU yield different result

ε祈祈猫儿з 提交于 2021-02-20 03:43:34
问题 Why am I seeing different result on GPU compare to sequential CPU? import numpy from numba import cuda from functools import reduce A = (numpy.arange(100, dtype=numpy.float64)) + 1 cuda.reduce(lambda a, b: a + b * 20)(A) # result 12952749821.0 reduce(lambda a, b: a + b * 20, A) # result 100981.0 import numba numba.__version__ # '0.34.0+5.g1762237' Similar behavior happens when using Java Stream API to parallelize reduction on CPU: int n = 10; float inputArray[] = new float[n]; ArrayList<Float

qsort does not work for double array

爱⌒轻易说出口 提交于 2021-02-20 03:43:22
问题 I try to sort an array of double value using qsort, but it doesn't seems to work. Wonder what has gone wrong here?? #include <stdio.h> #include <stdlib.h> static double compare (const void * a, const void * b) { if (*(double*)a > *(double*)b) return 1; else if (*(double*)a < *(double*)b) return -1; else return 0; } int main() { int idx; double* sum_least_square_err; sum_least_square_err = (double*) malloc (2500*2500*sizeof(double)); sum_least_square_err[0] = 0.642; sum_least_square_err[1] = 0

Get response link from HTTP request on Powershell

故事扮演 提交于 2021-02-20 03:43:12
问题 The following Powershell script runs a Google search of an image stored within my hard drive. How can I get the link which is followed to get to the results page? Is it possible to navigate to the different webpages displayed on it? I've tried $request.Links | Select href to try and get a list of the links, but it didn't work. I've also tried to add Write-Output $respStream to the code, but then it doesn't run. Set-ExecutionPolicy Bypass -scope Process -Force function Get-GoogleImageSearchUrl