cpu-usage

问题 I have an objective-c application for OS X that compares two sqlite DB's and produces a diff in json format. The db are quite large (10,000 items with many fields). Sometimes this applications runs in about 55 sec(using 95% of the cpu). Sometimes it takes around 8 min (using 12% of the cpu). This is with the same DB's. When it is only using a small portion of the cpu the rest is available. There does not appear to be anything taking priority over the process. Adding "nice -20" on the command

问题 Hey I'm learning psutil package and I want to know how to display current CPU usage when function is in progress? I suppose I need some threading or something like this, but how to do it? Thank u for any answers. import psutil import random def iHateThis(): tab = [] for i in range(100000): tab.append(random.randint(1, 10000)) tab.sort() return tab; while(True): currentProcess = psutil.Process() print(currentProcess.cpu_percent(interval=1)) 回答1: You can use threading to run iHateThis or to run

问题 I have a JTable and one of its columns should display an image; I overrided getTableCellRendererComponent method of DefaultTableCellRenderer to do this. But the problem is while the image is not Null & cell is displaying it this method is called over & over (like it is called in an infinite loop) and uses 100% of CPU! (When the image is Null there is no problem!). What is the problem? My extended class is: public class imageCellRenderer extends DefaultTableCellRenderer{ @Override public void

问题 I am using eclipse Juno, and yesterday I noticed my computer was getting very hot. I checked the CPU usage to see it was at 100%. Eclipse was the culprit, busy "re-indexing repository workspace". When after half an hour it hadn't finished and my machine was nearly melting, I searched and found these similar problems: Re-indexing repository loop - not Maven Eclipse hangs on "Re-indexing (fully) repository {username}" Thing is I'm not using git. And by the sounds of things I don't want to since

问题 I recently wrote a Vector 3 class, and I submitted my normalize() function for reviewal to a friend. He said it was good, but that I should multiply by the reciprocal where possible because "multiplying is cheaper than dividing" in CPU time. My question simply is, why is that? 回答1: Think about it in terms of elementary operations that hardware can more easily implement -- add, subtract, shift, compare. Multiplication even in a trivial setup requires fewer such elementary steps -- plus, it

问题 I want to make C++ program that one thread sends the network message periodically at 1 seconds interval. I heard about boost library the most useful cross-platform library to support c++. My first idea is below. Define one function which has the logic to send N/W message¹. Register timer bind with above function. 1.Function has logic which register itself(same with 2.) at end of the block. Then, while this thread is running, the send N/W message¹ logic is recursively called every 1 seconds

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I generally know that the more the number of processors the more processes (watching a movie, playing some game, running firefox with youtube playing a Simpson's episode, all simultaneously) you can have simultaneously going without your computer slowing down. But I want to know how to make sense of the linux

问题 I been trying to read cpu usage in my application using the @szcoder answer to How to get Memory usage and CPU usage in android? here at SOF. His solution used to work on my Samsung Galaxy S2 (dual-core cpu), but its not working on my HTC One M7 which is quad core. Most of the readings (Value from @szcoder's method*100 i.e percentage cpu usage) are either negative, some less than 10% and few are more than 100%. In a comment to this answer Dave suggests that we should use multiple readings for

问题 Is it possible to print the current CPU usage for each core in the system? This is what I have so far using powershell: Get-WmiObject -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor" 回答1: It can be be done using the following powershell command: (Get-WmiObject -Query "select Name, PercentProcessorTime from Win32_PerfFormattedData_PerfOS_Processor") | foreach-object { write-host "$($_.Name): $($_.PercentProcessorTime)" }; Also you could create a file

问题 I am stuck in a situation where I need to generate a defined frequency of some Hz. I have tried multimedia timers and all other stuff available on the internet but so far an infinite loop with some if-else conditions gave me the best results. But the problem in this approach is that it consumes almost all of the cpu leaving no space for other applications to work properly. I need an algorithm with either generates frequency of some Hz to KHz. I am using windows plateform with C#. 回答1: You can