why time zones exist

The most common pattern we use in programming is the single case pattern, however, the single case pattern is used in any situation. Why not use a static method instead of a single case pattern? To make sense of these problems, we need to start with

In the previous blog, we will see that the kernel has successfully deferred the allocation of dynamic memory for processes using a new resource. When a user-state process requests dynamic memory, it does not obtain the requested page box, but only

The critical section is a mechanism to prevent multiple threads from executing a specific code section at the same time. This topic does not attract much attention, so people cannot fully understand it. When you need to track the performance of

In the Python language, uincode string processing has always been a confusing problem. Many python enthusiasts often have trouble figuring out the difference between Unicode, UTF-8, and many other encodings. This article describes the knowledge of

Post address: http://hi.baidu.com/mailluzhou/item/98052fdc701baade241f4008 1. Related Concepts Basic recycling Algorithm Reference counting)The old recycling algorithm. The principle is that this object has a reference, that is, adding a count.

Operating System-solves time-related errors in Concurrent Processes Many processes exist in a multi-channel programming system. They may mount the primary memory at the same time and wait for the scheduling of the processor, which forms a concurrent

Unlock the code deadlock in the critical section of Windows released on: 1/13/2005 | updated on: 1/13/2005 Matt pietrek and Russ osterlund This document assumes that you are familiar with Win32, C ++, and multithreading. Download the code in this

Tomcat startup parameter, which writes jvm gc information to tomcat_gc.log Catalina_opts = '-xms512m-xmx4096m-XX: permsize = 64 m-XX: maxnewsize = 128 M-XX: maxpermsize = 64 m-XX: parallelgcthreads = 8-XX: +

Basic Principles of GCWhat is GC? Why does GC exist?GC refers to garbagecollection. Memory Processing is a place where programmers are prone to problems. Forgetting or wrong memory collection may lead to instability or even crash of programs or

In the previous blog, we explained the segmentation and paging mechanisms of Linux kernel based on the 80x86 system, and discussed in detail the Linux memory layout. With these basic concepts, we will discuss in detail how the kernel dynamically