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What is a “thread” (really)?
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@Richard: The exact list of CPU registers depends on the architecture, but instruction pointer and stack pointer are pretty much universal. They define a thread insofar as when this thread (set of register values) is loaded in the processor core, the t...
What kind of Garbage Collection does Go use?
...-world/concurrent collector
stop-the-world part limited by a 10ms deadline
CPU cores dedicated to running the concurrent collector
tri-color mark-and-sweep algorithm
non-generational
non-compacting
fully precise
incurs a small cost if the program is moving pointers around
lower latency, but most lik...
拉里佩奇23条箴言帮你度过创业低谷 - 资讯 - 清泛网 - 专注C/C++及内核技术
...事物一直在改变,如果你的事业是稳定的,那你可能是有问题的。
编者注:或许你不知道拉里·佩奇,但一定知道谷歌。他说“你可能觉得谷歌很好用,但我仍觉得它烂透了。”你永远不会相信,就是这个人,一手缔造了谷歌...
高并发服务端分布式系统设计概要 - C/C++ - 清泛网 - 专注C/C++及内核技术
...拆分),并时刻不要忘记备份、扩展、意外处理等讨厌的问题。说起来都比较简单,但设计和实现起来,就会比较困难。以前我的文章,都是“从整到零”的方式来设计一个系统,这次咱们就反着顺序来。
那我们首先来看,我...
Programmatically get the cache line size?
...nt kernel), you can get this information out of /sys:
/sys/devices/system/cpu/cpu0/cache/
This directory has a subdirectory for each level of cache. Each of those directories contains the following files:
coherency_line_size
level
number_of_sets
physical_line_partition
shared_cpu_list
shared_cp...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
Is calculating an MD5 hash less CPU intensive than SHA-1 or SHA-2 on "standard" laptop x86 hardware? I'm interested in general information, not specific to a certain chip.
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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...GO使用指南LINGO使用指南LINGO是用来求解线性和非线性优化问题的简易工具。LINGO内置了一种建立最优化模型的语言,可以简便地表达大规模问题,利用LIN...
LINGO是用来求解线性和非线性优化问题的简易工具。LINGO内置了一种建立...
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...
VM 磁盘空间扩容引起的一些问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
VM 磁盘空间扩容引起的一些问题TOP如下存储分区如下ESX1下挂载情况如下图ESX2下挂载情况如下图现在有个需求,lun60的空间偏大,缩小为1T,LUN80的空间偏小,扩大为1.5T先...TOP 如下
存储分区如下
ESX1下挂载情况如下图
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Why does “while(true)” without “Thread.sleep” cause 100% CPU usage on Linux but not on Windows?
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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
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