cpu-usage

问题 I have a multithreaded server application. This application receives data from sockets then handles these data like unpacking package, adding to data queue, etc, the function is as below. This function is called frequently. There is a select statement and if it finds there is data it will call this function to receive): //the main function used to receive //file data from clients void service(void){ while(1){ .... struct timeval timeout; timeout.tv_sec = 3; ... ret = select(maxFd+1, &read_set

问题 I have got a problem with the background fading script. The function causes high CPU usage (30-40%, tested on Intel i7-4810MQ). The problem is present only on Chrome and Opera. With Firefox everything work fine. It's quite a big problem for me, because when my website is open the laptop starts heating and the fan is getting louder. Here is the jsfiddle code: http://jsfiddle.net/jwdu8mkq/4/ JS: $(document).ready(function() { var background = {}; background.num = 3; background.min = 1;

问题 I am pretty new to iphone development, can any body guide me through with some APIs and libraries which be used for: RAM usage CPU usage in iPhone need to do something like this app 回答1: For Battery usage you can implement this notification UIDeviceBatteryLevelDidChangeNotification I am not sure about CPU and Ram usage. 来源： https://stackoverflow.com/questions/6519531/iphone-what-libraries-or-apis-need-to-be-used-for-cpu-ram-usage-in-iphone

问题 I've found various ways to track down CPU's and RAM's usage from within a process, in C#. I'd like to obtain those infos for an external program (like providing its PID). Is there anything in the .NET framework that can help me? Thanks 回答1: you can use process class 回答2: Use Performance Monitor, and add counters for specific processes. If you need to analyse the results, you can have them written to a performance log. 回答3: You could host a PowerShell RunSpace and call stuff in there - it's

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . How can I get a thread's cpu time from the thread itself in Mac OS X ? For linux, what I do is getrusage(RUSAGE_THREAD, &ru) but this solution isn't available for Mac OS X. I came across this question but I don't

问题 I have a problem when I run a script with python. I haven't done any parallelization in python and don't call any mpi for running the script. I just execute "python myscript.py" and it should only use 1 cpu. However, when I look at the results of the command "top", I see that python is using almost 390% of my cpus. I have a quad core, so 8 threads. I don't think that this is helping my script to run faster. So, I would like to understand why python is using more than one cpu, and stop it from

问题 I'm building a an application using sails and every time I leave the server running for more than a few minutes my CPU jumps to a solid 100% usage. I'm including a big amount of less files in my assets and I believe my issue lies here. Are there any other reasons this may happen? 回答1: It could be the grunt-watch, when you have a lot of files it squeezes your cpu. Try disabling that and check if your cpu gets to a normal usage (6-30% depending on your cpu and overall usage). To do that go to

问题 I have a larger C++ program which starts out by reading thousands of small text files into memory and storing data in stl containers. This takes about a minute. Periodically, a compilation will exhibit behavior where that initial part of the program will run at about 22-23% CPU load. Once that step is over, it goes back to ~100% CPU. It is more likely to happen with O2 flag turned on but not consistently. It happens even less often with the -p flag which makes it almost impossible to profile.

问题 I am currently writing an application in Windows using C++ and I would like to simulate CPU load. I have the following code: void task1(void *param) { unsigned elapsed =0; unsigned t0; while(1){ if ((t0=clock())>=50+elapsed){//if time elapsed is 50ms elapsed=t0; Sleep(50); } } } int main(){ int ThreadNr; for(int i=0; i < 4;i++){//for each core (i.e. 4 cores) _beginthread( task1, 0, &ThreadNr );//create a new thread and run the "task1" function } while(1){} } I wrote this code using the same

问题 I am running a shell script to execute a c++ application, which measures the performance of an api. i can capture the latency (time taken to return a value for a given set of parameters) of the api, but i also wish to capture the cpu and memory usage alongside at intervals of say 5-10 seconds. is there a way to do this without effecting the performance of the system too much and that too within the same script? i have found many examples where one can do outside (independently) of the script