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Understanding Apache's access log
...0")
%>s is the status code sent from the server to the client (200, 404 etc.)
%b is the size of the response to the client (in bytes)
Referer is the Referer header of the HTTP request (containing the URL of the page from which this request was initiated) if any is present, and "-" otherwise.
User...
Linux下追踪程序退出(崩溃)思路 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...命令。
Linux下程序退出(崩溃)时总会留下一些蛛丝马迹，问题追踪思路总结如下：
1、查看程序日志，确定退出(崩溃)时间。
2、coredumpctl查看是否有崩溃记录。
3、查看系统日志 cat /var/log/message，已切分压缩的日志使用 xzcat 查...
Retrieve CPU usage and memory usage of a single process on Linux?
I want to get the CPU and memory usage of a single process on Linux - I know the PID. Hopefully, I can get it every second and write it to a CSV using the 'watch' command. What command can I use to get this info from the Linux command-line?
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Virtual functions and performance - C++
...ourse cannot optimise based on what might happen at runtime, so prediction etc would have to be done by the CPU itself... but good C++ compilers (if instructed) go to great lengths to optimise functions and loops long before runtime.
– underscore_d
Apr 10 '16 a...
How to read the Stock CPU Usage data
On Ice Cream Sandwich, an option in the Developer Options is "Show CPU Usage", which adds an overlay on the screen (see screenshot below).
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How to calculate the CPU usage of a process by PID in Linux from C?
I want to programmatically [in C] calculate CPU usage % for a given process ID in Linux.
12 Answers
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Technically, why are processes in Erlang more efficient than OS threads?
...he entire CPU state (normal, SSE and FPU registers, address space mapping, etc.).
Erlang processes use dynamically allocated stacks, which start very small and grow as necessary. This permits the spawning of many thousands — even millions — of Erlang processes without sucking up all available RA...
Using ThreadPool.QueueUserWorkItem in ASP.NET in a high traffic scenario
...hich is why for example asynchronous pages exist in ASP.NET. If I want to fetch a result from a remote web service to display, I'm not going to do that via MSMQ. In this case, I'm writing to a log using a remote post. It doesn't fit the problem to write a Windows Service, nor hook up MSMQ for that (...
Go > operators
...ed to be) the same. The reason for this is that emitting exactly 1 SHL/SHR/etc instruction to implement the shift operator is the best thing that an optimizing C/C++ compiler can do when the context does not tell it anything about 'x' and 'y'. And, if the compiler knows for a fact that the code has ...
地图组件（高德地图） · App Inventor 2 中文网
...标。
此功能的可用性和准确性取决于用户是否启用了定位服务以及可用的位置提供商。
用户纬度
如果启用了显示用户位置，则返回用户的纬度。
用户经度
如果启用了显示用户位置，则返回用户的经度。
可见性
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