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java Programming Glossary: cpuDifference between wait() and sleep() http://stackoverflow.com/questions/1036754/difference-between-wait-and-sleep that a wait ing Thread is still in running mode and uses CPU cycles but a sleep ing does not consume any CPU cycles correct.. and uses CPU cycles but a sleep ing does not consume any CPU cycles correct Why do we have both wait and sleep how does their..
Error java.lang.OutOfMemoryError: GC overhead limit exceeded http://stackoverflow.com/questions/1393486/error-java-lang-outofmemoryerror-gc-overhead-limit-exceeded is taking an excessive amount of time by default 98 of all CPU time of the process and recovers very little memory in each.. at all time. To prevent your application from soaking up CPU time without getting anything done the JVM throws this Error..
http://stackoverflow.com/questions/13999506/threads-with-key-bindings at least the target time between renders. This saves the CPU from hogging. while now lastRenderTime TARGET_TIME_BETWEEN_RENDERS.. Thread.yield This stops the app from consuming all your CPU. It makes this slightly less accurate but is worth it. You.. can remove this line and it will still work better your CPU just climbs on certain OSes. FYI on some OS's this can cause..
Collision detection with complex shapes http://stackoverflow.com/questions/14574045/collision-detection-with-complex-shapes idea and is it possible to do easily Would this be a big CPU hog or is there a better way to do this Level image Obstacles..
Java NIO FileChannel versus FileOutputstream performance / usefulness http://stackoverflow.com/questions/1605332/java-nio-filechannel-versus-fileoutputstream-performance-usefulness the disk and not Java. I would also suggest that if your CPU is not busy then you are probably experience some other bottle.. but modern Sun and IBM versions on general purpose CPUs are good to go. What happens is the data goes straight to from.. destination...by passing any circuit through RAM or the CPU. The web app I spent my days and night working on is very IO..
Using Java to get OS-level system information http://stackoverflow.com/questions/25552/using-java-to-get-os-level-system-information extract information such as the current disk space used CPU utilisation and memory used in the underlying OS What about..
What is the memory consumption of an object in Java? http://stackoverflow.com/questions/258120/what-is-the-memory-consumption-of-an-object-in-java done by a particular JVM implementation for a particular CPU type. It looks like a Long is 8 bytes of Object overhead plus..
Fastest way to determine if an integer's square root is an integer http://stackoverflow.com/questions/295579/fastest-way-to-determine-if-an-integers-square-root-is-an-integer faster than your 6bits Carmack sqrt code at least with my CPU x86 and programming language C C . Your results may vary especially..
http://stackoverflow.com/questions/299068/how-slow-are-java-exceptions using setjmp and longjmp. That means all registers of the CPU are written to the stack which already takes some time and possibly..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog protected String doInBackground String... sUrl take CPU lock to prevent CPU from going off if the user presses the power.. doInBackground String... sUrl take CPU lock to prevent CPU from going off if the user presses the power button during download.. extends Service you must manually spawn new threads to run CPU blocking operations . Download service can look like this public..
If profiler is not the answer, what other choices do we have? http://stackoverflow.com/questions/4387895/if-profiler-is-not-the-answer-what-other-choices-do-we-have is in I O except for user input or in GC or in a tight CPU loop or whatever. Sampling should read the function call stack..
How to monitor the computer's cpu, memory, and disk usage in Java? http://stackoverflow.com/questions/47177/how-to-monitor-the-computers-cpu-memory-and-disk-usage-in-java EDIT To clarify I would like to get the current CPU usage for the whole system not just the Java process es . EDIT.. needs. Using Java and the Sigar API you can get Memory CPU Disk Load Average Network Interface info and metrics Process..
Java Refuses to Start - Could not reserve enough space for object heap http://stackoverflow.com/questions/1058471/java-refuses-to-start-could-not-reserve-enough-space-for-object-heap currently shows the following procs memory swap io system cpu r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0..
http://stackoverflow.com/questions/1114270/android-screen-timeout I know its possible to use a wakelock to hold the screen cpu ect on but how can I programmatically change the Screen Timeout..
Detect CPU Speed/Memory/Internet Speed using Java? http://stackoverflow.com/questions/1297870/detect-cpu-speed-memory-internet-speed-using-java to the web would also be awesome. java memory networking cpu ram share improve this question This really depends on your.. on your OS. If you're on Linux take a look at the proc cpuinfo filesystem for CPU info. proc generally has a wealth of..
JAVA: How to scale threads according to cpu cores? http://stackoverflow.com/questions/1980832/java-how-to-scale-threads-according-to-cpu-cores How to scale threads according to cpu cores I'm not a good java programmer it's just my hobby but.. instead a coresponding amount of threads to the amount of cpu cores. and my problem is that I couldn't find an easy tutorial.. example That would be really nice java multithreading cpu cores share improve this question You can determine the..
http://stackoverflow.com/questions/4633866/is-volatile-expensive main memory has to be hit making volatile slower on multi cpu systems right PS On my way to learn more about this I stumbled..
How to monitor the computer's cpu, memory, and disk usage in Java? http://stackoverflow.com/questions/47177/how-to-monitor-the-computers-cpu-memory-and-disk-usage-in-java to monitor the computer's cpu memory and disk usage in Java I would like to monitor the following.. monitor the following system information in Java current cpu usage percent available memory free total available disk space.. For my current needs I'm leaning towards the following for cpu usage OperatingSystemMXBean.getSystemLoadAverage OperatingSystemMXBean.getAvailableProcessors..
Is System.nanoTime() completely useless? http://stackoverflow.com/questions/510462/is-system-nanotime-completely-useless Java's System.nanoTime returns the time value using a cpu specific counter. Now consider the following case I use to measure.. processor whose counter is less than that of the previous cpu. Thus we could get a value in time2 which is less than time1... not the problem i describe above. The problem is that each cpu will keep a different counter since it was turned on. This counter..
How do I simulate a buffered peripheral device with SwingWorker? http://stackoverflow.com/questions/7036509/how-do-i-simulate-a-buffered-peripheral-device-with-swingworker pattern suggested here your model is the operation of a cpu. Although it may be a different class I can't see any reason..
How to do I check CPU and Memory Usage in Java? http://stackoverflow.com/questions/74674/how-to-do-i-check-cpu-and-memory-usage-in-java anyone know how it could be done java operating system cpu ram share improve this question This question has some good..
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