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C++ obtaining milliseconds time on Linux — clock() doesn't seem to work properly
...ld more (your program could run multiple threads and so could consume more CPU than real time) or less. It measures an approximation of CPU time used. To see the difference consider this code
#include <iostream>
#include <ctime>
#include <unistd.h>
int main() {
std::clock_t a...
When should one use a spinlock instead of mutex?
...r, the operating system will forcefully switch to another thread, once the CPU runtime quantum of the current thread has been exceeded, of course).
The Problem
The problem with mutexes is that putting threads to sleep and waking them up again are both rather expensive operations, they'll need quit...
lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
..."栈"上，然后获取数据，栈中的每个数据通过索引值进行定位，索引值为正时表示相对于栈底的偏移索引，索引值为负时表示相对于栈顶的偏移索引，索引值以1或-1为起始值，因此栈顶索引值永远为-1 ,栈底索引值永远为1 。 "栈"...
What happens when a computer program runs?
...n also be loaded from elsewhere in memory or other places depending on the CPU instructions that are actually executed). They are essentially just very small, very fast on-chip memory locations that are used for a number of different purposes.
Register layout is highly dependent on the architectur...
Why does “while(true)” without “Thread.sleep” cause 100% CPU usage on Linux but not on Windows?
...
Yup - on a '4+4' i7, (hyperthreading), one trivial CPU loop comes out at about 17-18%.
– Martin James
Jan 29 '13 at 12:55
...
CPU Privilege Rings: Why rings 1 and 2 aren't used?
A couple of questions regarding the x86 CPU privilege rings:
3 Answers
3
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MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
MySQL一次主从数据不一致的问题解决过程情况时这样的：昨天晚上主动2个机器都迁移了，然后今天才把主动重新连接上，但是从库的偏移量是从今天当前时刻开始的，也就是说虽然现在主...情况时这样的：
昨天晚上主动2个机器...
Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...48000=0x988，我们按 return 键，打开 go to 窗口，输入 0x988 ，定位到08048988处，改代码为e830000000。改完后，“ ./cm2 ”运行程序，OK。出现 crackme 窗口了。
第二个任务，找出正确的注册码。
为保持本文一个苗条的身材及加大本文所...
Difference between volatile and synchronized in Java
...n memory of what has been done are visible to other threads. Because each CPU has several levels of cache between it and main memory, threads running on different CPUs or cores can see "memory" differently at any given moment in time because threads are permitted to obtain and work on private copie...
How do cache lines work?
... the byte or word you're loading is not already present in the cache, your CPU will request the 64 bytes that begin at the cache line boundary (the largest address below the one you need that is multiple of 64).
Modern PC memory modules transfer 64 bits (8 bytes) at a time, in a burst of eight tran...