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Difference between core and processor
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A core is usually the basic computation unit of the CPU - it can run a single program context (or multiple ones if it supports hardware threads such as hyperthreading on Intel CPUs), maintaining the correct program state, registers, and c...
VS2013 permanent CPU usage even though in idle mode
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This problem happened for me after I installed the 3rd party GIT tools and setting the plugin to None fixed it. Interestingly, after setting this to None, I have set it back to the MS Git provider and the problem has not returned.
– TreeAndLeaf...
Floating point vs integer calculations on modern hardware
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From my experience, there are many, many variables to performance...especially between integer & floating point math. It varies strongly from processor to processor (even within the same family such as x86) because different processors have different "pipeline" lengths. Also, some operations ...
How do I choose between Semaphore and SemaphoreSlim?
...uld be used when "wait times are expected to be very short". That would usually dovetail nicely with the idea that the slim version is more lightweight for most of the trade offs.
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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
创建增量同步Oracle物化视图问题我们采用Oracle的物化视图增量刷新机制定时将数据库A上的某个表的数据同步到另一个数据库B上。我们常用的最简单的实现步骤是这样。首先在数...我们采用Oracle的物化视图增量刷新机制定时将数...
Nginx缓存解决方案:SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
...多的时候,冗余的浪费将非常严重,此外还有数据一致性问题,所以它只是一个粗线条的解决方案。
对此类问题而言,SRCache是一个细粒度的解决方案。其工作原理大致如下:
SRCache工作原理
当问题比较简单的时候,通常SRC...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的处理方法混为一谈,以为优化系统内核参数就可以解决问题,其实是不恰当的,优化系统内核参 数解决TIME_WAIT可能很容易,但是应对CLOSE_WAIT的情况还是需要从程序本身出发。现在来分别说说这两种情况的处理方法:
1.服务...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...用Makefile时,有一些我们会经常使用,而且使用频率非常高的东西,比如,我们编译C/C++的源程序为中间目标文件(Unix下是[.o] 文件,Windows下是[.obj]文件)。本章讲述的就是一些在Makefile中的“隐含的”,早先约定了的,不需要...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...用Makefile时,有一些我们会经常使用,而且使用频率非常高的东西,比如,我们编译C/C++的源程序为中间目标文件(Unix下是[.o] 文件,Windows下是[.obj]文件)。本章讲述的就是一些在Makefile中的“隐含的”,早先约定了的,不需要...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...用Makefile时,有一些我们会经常使用,而且使用频率非常高的东西,比如,我们编译C/C++的源程序为中间目标文件(Unix下是[.o] 文件,Windows下是[.obj]文件)。本章讲述的就是一些在Makefile中的“隐含的”,早先约定了的,不需要...