CUDA WarpReduce learning notes
prefacePreviously, how can our company implement an efficient Softmax CUDA kernel? Some details are still not understood. It happens that a similar Reduce+Scale Kernel will be built recently. The principle and mechanism are still relatively similar, so turn it out and re understand it.backgroundWe define a ReduceScale operation:Assuming Tensor ...
Posted by eddiegster on Wed, 25 May 2022 11:18:27 +0300
Permission control logic of Django and DRF
The module responsible for permission control in Django project is contrib auth. Sometimes, in order to extend the row level permission function, a package named Guardian is introduced. The description of this article is based on the combination of Django + DRF + Guardian.
model
Django does not strictly follow the RBAC model. His "permiss ...
Posted by Svoboda on Wed, 25 May 2022 11:16:26 +0300
CAS operation and use of atomic classes
CAS operation and use of atomic classes
1. CAS operation
In Java, locking can solve some concurrency problems, but a bad problem with locking is that when a thread does not obtain the lock, it will be blocked and suspended, which will lead to the switching of thread context and rescheduling overhead. Java provides a non blocking volatile keywor ...
Posted by abnfire on Wed, 25 May 2022 11:12:21 +0300
Is JSONP a gadget? Solve cross domain problems?
Browser homology policy
Restrict js from sending requests to other domain names, and the browser debugging error is as follows
JSONP is a solution
The browser does not block requests from tags with src attributes. So you can send a request using < script src = "xxxxx" > < / script >
However: the returned data (strin ...
Posted by satanclaus on Wed, 25 May 2022 11:07:00 +0300
Briefly talk about the changes of zval in PHP5 and PHP7
In this article, I try to use popular words to describe the difference between the two zval. The summary is at the end.
Official start
Structure of zval:
type
value
refcount: this parameter is used several times (including references). The garbage collection mechanism also judges this value, int
is_ref: whether it is referenced, true|false
...
Posted by exploo on Wed, 25 May 2022 11:04:37 +0300
Simple example of C# Npoi operating Excel
Briefly record NPOI's operation on Excel table
1, Read Excel data
1-1 reading Excel documents
① Check whether the Excel extension is ". xls" or ". xlsx";
② Open the file stream and read the Excel file;
③ Instantiate an IWorkbook through the Excel extension and pass in the obtained file stream: ". xls" to create & ...
Posted by TheCase on Wed, 25 May 2022 11:03:40 +0300
Algorithm - four channel shell programming about LeetCode
Recently, I came across some simple commands under linux and the use of awk sed and other text editors in the interview. I tried my best to button up four shell questions for learning. Of course, I also refer to some other people's answers as a summary. Please supplement and exchange. If there is infringement, contact and delete it
Question 1: ...
Posted by ruzztec on Wed, 25 May 2022 10:59:59 +0300
Graphical user interface: Swing component list
7, Check box
Check boxes provide a way to make a single selection of "checked" or "unchecked". It contains a small box and a label. This box usually has an "x" mark (or other mark indicating "selected") or is empty, depending on whether the check box is selected.
JCheckBox is usually created using a con ...
Posted by mdowling on Wed, 25 May 2022 10:54:33 +0300
C++ copy constructor
copy constructor
We often use a variable to initialize a variable of the same type, so there should be similar operations for custom types, so how to use an existing object to create another same object when creating an object?
Constructor: There is only a single parameter, which is a reference to an object of this class type (usually cons ...
Posted by mad81 on Wed, 25 May 2022 10:40:27 +0300
C + + learning | implementation principle of polymorphism virtual destructor, pure virtual function and abstract class
1. Introduction
The basic concept of polymorphism and two simple examples based on polymorphism are introduced above. This paper will introduce the specific implementation principle of polymorphism and the use of constructor and destructor in polymorphism.
2. Implementation principle of polymorphism
The key to polymorphism is that when a vi ...
Posted by Bullit on Wed, 25 May 2022 10:28:08 +0300