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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...程级的事件并打印。
sched: sched探针可以探测调度器的高级事件和进程事件如fork, exec和上下文切换
probe: 探针的完整名称
interval:s:5: 探针每5秒仅在一个cpu上触发一次。用来创建脚本级别的间隔或超时时间。
exit(): 退出bpftrace...
Specifying and saving a figure with exact size in pixels
...I is not supported by all backends. Here, the PNG backend is used, but the pdf and ps backends will implement the size differently. Also, changing the DPI and sizes will also affect things like fontsize. A larger DPI will keep the same relative sizes of fonts and elements, but if you want smaller fo...
Disabling browser print options (headers, footers, margins) from page?
...from the margins; see What does the mozdisallowselectionprint attribute in PDF.js do?.
Other browsers
Unfortunately, there seems to be no way to resolve this problem in Internet Explorer, so you'll have to resort to PDF or ask users to disable margin texts.
The same goes for Safari; according to a c...
Why does C++11 not support designated initializer lists as C99? [closed]
... standard: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0329r4.pdf
This brings limited support for c99's Designated Initializers. This limitation is described as follows by C.1.7[diff.decl].4, given:
struct A { int x, y; };
struct B { struct A a; };
The following Designated Initializa...
C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...myFile.ReadToEnd();//myString是读出的字符串
myFile.Close();
三、高级应用
读取xml数据，两种xml方式
第一种方法：
<aaa>
<bb>something</bb>
<cc>something</cc>
</aaa>
DS.ReadXml("your xmlfile name");
Container.DataItem("bb");
Container.DataItem("cc");
...
Why can't C++ be parsed with a LR(1) parser?
...biguities".
It goes on to give a number of examples (see page 147 of the pdf).
The example is:
int(x), y, *const z;
meaning
int x;
int y;
int *const z;
Compare to:
int(x), y, new int;
meaning
(int(x)), (y), (new int));
(a comma-separated expression).
The two token sequences have the ...
Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...pache两种工作模式区别及配置切换1、Redhat Linux下查看apache版本号在Apache安装目录bin下，使用以下命令查看即可。使用命令：. httpd -v示例：2、查看Apache当前工作模...1、Redhat Linux下查看apache版本号
在Apache安装目录bin下，使用以下...
How to create a density plot in matplotlib?
...her query to ask my data is discrete in nature and I am trying to plot the PDF for that, after reading through scipy doc I understood that PMF = PDF any suggestions on that how to plot it?
– Sitz Blogz
Apr 19 '16 at 19:31
...
开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
...用单线程架构。Mosquitto 支持 MQTT 协议的 5.0、3.1.1 和 3.1 版本，同时支持 SSL/TLS 和 WebSockets。轻量级设计使其适合部署在嵌入式设备或资源有限的服务器上。优点：易于安装使用支持 MQTT 5.0 协议轻量高效积极的社区支持
缺点：可...
How to sort in-place using the merge sort algorithm?
...result", this paper describes a couple of variants of in-place merge sort (PDF):
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.22.5514&rep=rep1&type=pdf
In-place sorting with fewer moves
Jyrki Katajainen, Tomi A. Pasanen
It is shown that an array of n
elements can be sor...