bandwidth

问题 I am developing a program that continually sends a stream of data in the background and I want to allow the user to set a cap for both upload and download limit. I have read up on the token bucket and leaky bucket alghorhithms, and seemingly the latter seems to fit the description since this is not a matter of maximizing the network bandwidth but rather being as unobtrusive as possible. I am however a bit unsure on how I would implement this. A natural approach is to extend the abstract

问题 How does VBulletin get the system information without the use of exec ? Is there any other information I can get about the server without exec? I am interested in: bandwidth used system type CPU speed/usage/count RAM usage 回答1: Use PHPSysInfo library phpSysInfo is a open source PHP script that displays information about the host being accessed. It will displays things like: Uptime CPU Memory SCSI, IDE, PCI Ethernet Floppy Video Information It directly parsed parses /proc and does not use exec

问题 I need to simulate a low bandwidth, high latency connection to a server in order to emulate the conditions of a VPN at a remote site. The bandwidth and latency should be tweakable so I can discover the best combination in order to run our software package. 回答1: For macOS , there is the Network Link Conditioner that simulates configurable bandwidth, latency, and packet loss. It is contained in the Additional Tools for Xcode package. 回答2: There's an excellent writeup of setting up a FreeBSD

问题 The dot product of two arrays for(int i=0; i<n; i++) { sum += x[i]*y[i]; } does not reuse data so it should be a memory bound operation. Therefore, I should be able to measure the memory bandwidth from the dot product. Using the code at why-vectorizing-the-loop-does-not-have-performance-improvement I get a bandwidth of 9.3 GB/s for my system . However, when I attempt to calculate the bandwidth using the dot product I get over twice the rate for a single thread and over three time the rate

问题 I am creating a new Traveling Application in iOS, this application is highly dependent on Maps and will include two Maps. My first Map will work when the user has a strong Network Signal (Apple Maps). My second Map will be used when their isn\'t any Network or really Low signal (Offline MapBox). Why do I have two different maps in one Application? My Application is a Direction App, so when the user has really low network or none it will go to the offline Map MapBox . Also the Apple Maps will