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Spinlock versus Semaphore
... means that acquiring a spinlock is a "busy" operation that possibly burns CPU cycles for a long time (maybe forever!) while it effectively achieves "nothing".
The main incentive for such an approach is the fact that a context switch has an overhead equivalent to spinning a few hundred (or maybe tho...
What does the Visual Studio “Any CPU” target mean?
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An AnyCPU assembly will JIT to 64-bit code when loaded into a 64-bit process and 32 bit when loaded into a 32-bit process.
By limiting the CPU you would be saying: There is something being used by the assembly (something likely
u...
How does one write code that best utilizes the CPU cache to improve performance?
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The cache is there to reduce the number of times the CPU would stall waiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth).
Tec...
deque iterator not dereferencable 问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
deque iterator not dereferencable 问题STL里面出现这个问题，纠结了半天，不知道什么原因。当然deque iterator not dereferencable。这个是deque出问题，vector、list也可以出...STL里面出现这个问题，纠结了半天，不知道什么原因。
当然deque iterat...
将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...IP来解压缩。 WINRAR和WINZIP在解压缩某些tar.gz包的时候会有问题。使得解包之后的目录和文件出现异常。如果是源代码包将有可能不能在Cygwin下面正确编译。解开压缩包之后，进入 tar-1.13目录，在当前的目录下面输入
./configure
命...
How to scale threads according to CPU cores?
...so I will have a look at this. And it can be scaled according to available cpu cores? Because I can't see that in you short examples. Best regards, Andreas
– Andreas Hornig
Dec 30 '09 at 16:10
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phpcms与ucenter整合常见问题与解答 - 更多技术 - 清泛网 - 专注C/C++及内核技术
phpcms与ucenter整合常见问题与解答视频教程:http: v9.help.phpcms.cn html 2010 phpsso_install_1028 96.html常见问题与解答：1、整合完成后，在 phpcms 注册、登录均失败...视频教程: http://v9.help.phpcms.cn/html/2010/phpsso_install_1028/96.html
常见问题与...
Benchmarking (python vs. c++ using BLAS) and (numpy)
...r).
Hardware
Our HPC has two different nodes one with Intel Sandy Bridge CPUs and one with the newer Ivy Bridge CPUs:
Sandy (MKL, OpenBLAS, ATLAS):
CPU: 2 x 16 Intel(R) Xeon(R) E2560 Sandy Bridge @ 2.00GHz (16 Cores)
RAM: 64 GB
Ivy (MKL, OpenBLAS, ATLAS):
CPU: 2 x 20 Intel(R) Xeon(R) E2680 ...
Why is reading lines from stdin much slower in C++ than Python?
...lly timing the execution of cat, not your benchmark. The 'user' and 'sys' CPU usage displayed by time are those of cat, not your benchmarked program. Even worse, the 'real' time is also not necessarily accurate. Depending on the implementation of cat and of pipelines in your local OS, it is possib...
技术人员如何去面试？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...的主要是如何选择公司、如何面试、如何谈薪水等实际的问题，可能描述会有偏颇，仅供参考。一、为什么跳槽和选择公司1.为什么跳槽虽...本文探讨的主要是如何选择公司、如何面试、如何谈薪水等实际的问题，可能描述会有...