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What specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
I can take a guess based on the names, but what specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
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CGRidCtrl控件 学习心得 - C/C++ - 清泛网 - 专注C/C++及内核技术
...编辑器在对话框上拖放一个picture控件，用来对GridCtrl控件定位用。定义其ID为：IDC_GRID_POS
图4
接着，在CGridCtrlTestDlg类中定义一个CMyGridCtrl的成员变量：m_GridCtrl。然后再在CGridCtrlTestDlg::OnInitDialog()中添加对控件的初始化代码： ...
Difference between a theta join, equijoin and natural join
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A theta join allows for arbitrary comparison relationships (such as ≥).
An equijoin is a theta join using the equality operator.
A natural join is an equijoin on attributes that have the same name in each relationship.
Additionally,...
一分钟明白 VS manifest 原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...xp及早前的windows版本，external manifest会比embed manifest有更高的优先级，但对于windows server及后的版本，相反。
为什么我的manifest明明指明
name="Microsoft.VC80.DebugCRT" version="8.0.50608.0"，
但是用depends.exe工具却发现引用的是8.00.50727.42呢...
What is the advantage of GCC's __builtin_expect in if else statements?
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I guess it should be something like:
cmp $x, 0
jne _foo
_bar:
call bar
...
jmp after_if
_foo:
call foo
...
after_if:
You can see that the instructions are arranged in such an order that the bar case precedes the foo case (as opposed to the C code). This can utilise the CPU ...
完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
...决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题问题描述：phpcms批量移动内容 文章，批量更新URL -> "批量更新内容页"后，发现原内容的评论、新闻心情全部丢失，这还不算差，后台评论排...问题描述：
phpcms批量移...
Why do x86-64 systems have only a 48 bit virtual address space?
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Because that's all that's needed. 48 bits give you an address space of 256 terabyte. That's a lot. You're not going to see a system which needs more than that any time soon.
So CPU manufacturers took a shortcut. They use an instruction set...
clang: how to list supported target architectures?
Currently I am interested in ARM in general and specifically iphone/android targets. But I just want to know more about clang, since it feels to play important role in the years to come.
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Can't pickle when using multiprocessing Pool.map()
...nsider it "easy" or not;-) is to add the infrastructure to your program to allow such methods to be pickled, registering it with the copy_reg standard library method.
For example, Steven Bethard's contribution to this thread (towards the end of the thread) shows one perfectly workable approach to a...
vs2010编译boost若干问题解决 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
vs2010编译boost若干问题解决首先说下环境，win7，vs2010。先在http: www.boost.org users download 上下载boost安装包，我下的是1.52.0版。按照说明，直接运行bootstr...首先说下环境，win7，vs2010。
先在http://www.boost.org/users/download/上下载boost安...