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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...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...bugging. Simple table:
Less locks means more contentions (slow syscalls, CPU stalls) and lesser parallelism
Less locks means less problems debugging multi-threading problems.
More locks means less contentions and higher parallelism
More locks means more chances of running into undebugable deadlock...
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...
Purpose of memory alignment
...y subsystem throughput tightly bound to the execution unit throughput (aka cpu-bound); this is all reminiscent of how PIO mode was surpassed by DMA for many of the same reasons in hard drives.
The CPU always reads at its word size (4 bytes on a 32-bit processor), so when you do an unaligned address...
What are the main uses of yield(), and how does it differ from join() and interrupt()?
...iority) will get a chance to run before the yielded thread is next
given CPU time. When it is eventually re-scheduled, it will come back
with a full full quantum, but doesn't "carry over" any of the
remaining quantum from the time of yielding. This behaviour is a
little different from a non-...
How to find the Number of CPU Cores via .NET/C#?
Is there a way via .NET/C# to find out the number of CPU cores?
11 Answers
11
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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
...
BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
...与前面几代不同的是，蓝牙4.0版引入的BLE协议更注重功耗问题，而非通信速率的提升。这也使得低功耗蓝牙更加节能，能使设备的电池维持很长时间，因此在很多可穿戴设备中得到了应用。
0x2 BLE工作流程0x21 工作过程蓝牙适用...
国务院:网速提40%流量不清零 三运营商尚未回应 - 资讯 - 清泛网 - 专注C/C+...
...用户的要求还是有一定差距。
闻库当时解释，当前资费高的原因是很多方面的，主因为市场供给不足，4G投资还没有见效益，成本降低和充分竞争还有进一步的推动空间。闻库表示，工信部还积极引入民资进入通信市场，希望...
Get OS-level system information
...w that this topic is quite outdated. BUT: If you really need the amount of cpu cores, then do not use this solution. I have a dual-core CPU with two threads for each core. The JVM does not return the hardware cores, but rather the software cores/threads.
– F_Schmidt
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