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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...w that this topic is quite outdated.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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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...
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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...
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How does the ARM architecture differ from x86? [closed]

... pipes for different type of instructions, even there are duplicated ones. CPU divides instructions into micro instructions and those can run in parallel among pipeline. – auselen Dec 17 '15 at 12:31 ...
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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...
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What is an application binary interface (ABI)?

...de, when you "call" that function, what you're really doing is causing the CPU to jump to the address of that label and continue executing there. In preparation for the jump, the compiler must do a bunch of important stuff. The calling convention is like a checklist that the compiler follows to do...
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Volatile vs. Interlocked vs. lock

...at all. The point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions. If it is not volatile, and CPU A increments a value, then CPU B may not actually see that incremented value until some time later, which may cause problems. If it is vol...
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Best way to iterate through a Perl array

...u-thread-multi I get: Benchmark: running 1, 2, 3, 4, 5, 6 for at least 3 CPU seconds... 1: 3 wallclock secs ( 3.16 usr + 0.00 sys = 3.16 CPU) @ 12560.13/s (n=39690) 2: 3 wallclock secs ( 3.18 usr + 0.00 sys = 3.18 CPU) @ 7828.30/s (n=24894) 3: 3 wallclock secs ( 3...
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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 ...
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c++ volatile关键字简析 - C/C++ - 清泛网 - 专注C/C++及内核技术

c++ volatile关键字简析volatile防范冲突,提高效率。降低CPU Cache Line锁冲突的几率。不同于普通变量在于:CPU缓存中有值的话,也得从内存中重新加载到缓存(普通变量不会);即认为寄存器值不可靠, volatile 防范冲突,提高效...