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What's the difference between emulation and simulation? [duplicate]
...tly like the real device would. For example, a NES emulator implements the CPU, the sound chip, the video output, the controller signals, etc. The unmodified code from a NES castridge can be dumped and then the resulting image can be loaded into our emulator and played.
A simulator is a partial imp...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...进依赖项，否则会出错。最开始的时候，就是这么一点小问题，让我浪费了几天时间。
再点击添加必须的插件，自动添加其它的依赖项。
再下一步，设置项目的构建路径，如下图：
下一步，导出我们的...
Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
...
This may have to do with the size of your cpu cache. If 2 rows of the matrix matrix do not fit, then you will loose time swapping in elements from RAM. The extra 4095 elements may just be enough to prevent rows from fitting.
In your case, 2 rows for 2047 2d matrices...
What is stability in sorting algorithms and why is it important?
...need stability, it's more complicated. Stable algorithms have higher big-O CPU and/or memory usage than unstable algorithms. So when you have a large data set, you have to pick between beating up the CPU or the memory. If you're constrained on both CPU and memory, you have a problem. A good compromi...
What is the difference between native code, machine code and assembly code?
...od.
The second column is the machine code. The actual 1s and 0s that the CPU executes. Machine code, like here, is commonly displayed in hex. Illustrative perhaps is that 0x8B selects the MOV instruction, the additional bytes are there to tell the CPU exactly what needs to be moved. Also note t...
How expensive is the lock statement?
...hat this is impossible to quantify, it heavily depends on the state of the CPU memory write-back buffers and how much data that the prefetcher gathered has to be discarded and re-read. Which are both very non-deterministic. I use 150 CPU cycles as a back-of-the-envelope approximation that avoids m...
项目管理实践教程二、源代码控制【Source Control Using VisualSVN Server ...
... Tools】发布后，根据大家的回复，我需要向大家说明几个问题：1 为什么要 在第一篇文章 项目管理实践教程一、工欲善其事，必先利其器【Basic Tools】发布后，根据大家的回复，我需要向大家说明几个问题：
1.为什么要用Visual...
Select n random rows from SQL Server table
...ISTICS IO ON
/* newid()
rows returned: 10000
logical reads: 3359
CPU time: 3312 ms
elapsed time = 3359 ms
*/
SELECT TOP 1 PERCENT Number
FROM Numbers
ORDER BY newid()
/* TABLESAMPLE
rows returned: 9269 (varies)
logical reads: 32
CPU time: 0 ms
elapsed time: 5 ms
*/
SELECT N...
Office在线预览及PDF在线预览的实现方式大集合 - 更多技术 - 清泛网 - 专注...
...阅读体验大大下降。
3、转换过程非常耗费资源，低配的CPU几乎能跑满，服务器卡死。转换时间也非常漫长，这个时间主要是卡在了转换PDF上面。
4、转换完成服务器会遗留大量Excel、Word进程无法正常退出，有一些折中的解决办...
How do I trap ctrl-c (SIGINT) in a C# console app
...nning may need to be marked volatile. The main thread might cache it on a CPU register otherwise, and won't notice the value change when the delegate is executed.
– cdhowie
Sep 20 '12 at 18:34
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