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Blocking Read Cpu Usage


If your timeout is set to 0, your code will execute normally, but you will read a zero-element array. Server Fault depends on everyone sharing their knowledge. What reasons are there to stop the SQL Server? 12 hour to 24 hour time converter The Ooh-Aah Cryptic Maze Keeping windshield ice-free without heater Where can I report criminal intent Feb 28, 2016 #44 [email protected] Yanbin, could you help to double check? ==== git diff marshmallow-mr1-release..m-dev logd/LogBuffer.h ==== diff --git a/logd/LogBuffer.h b/logd/LogBuffer.h index 4769a6c..0cbd72d 100644 --- a/logd/LogBuffer.h +++ b/logd/LogBuffer.h @@ weblink

Windows does not have this problem. The time now is 09:27 PM. The 7 cpu statistics explained There are several different ways to see the various CPU statistics. I doubt it is related, but want to remove FUD.

Linux Cpu Usage Command

As it's currently written, it’s hard to tell exactly what you're asking. Like for instance there could be some kind of mini cpu which would just wait for it and deliver the small part of data to the real cpu as soon as Could be why I got horible results, maybe a faster CPU would yeild less than 100% CPU usage. 08-28-2007 #4 Salem View Profile View Forum Posts and the hat of int So, if the user performs an operation which requires a particular sector to be read from the hard drive, and that sector does not already happen to be in the cache,

Lagging specifically (Search for "Linux mouse lag" ). Indeed, if that's such a difficult task and the cpu would have to wait, why isn't that managed by hardware more efficiently then? Linux is simply not designed for smooth behavior in mind, feelings does not matter here. Cpu Usage Command In Unix If it really is that CPU intensive, try running it through gprof to see where the bottleneck is. –Chris Aug 12 '11 at 4:20 I usually use the Qt

Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Linux Cpu Load Average I was not able to test on 2 computers through lan sence our other computer is currently broken but I think this test is enough to say that you are right. Feb 22, 2016 #30 [email protected] How do you think about snd_timeout? http://stackoverflow.com/questions/19738300/what-is-the-issue-of-select-using-so-much-cpu-power The problem(s) get worse for larger buffer sizes as this is a scaling issue.

Here the related code: ============================================= file:LogStatistics.h template class LogHashtable { std::unordered_map map; public: typedef typename std::unordered_map::iterator iterator; std::unique_ptr sort(size_t n) { if (!n) Linux Total Cpu Usage So my main question is: what is a good lightweight way to read messages from a serial port without heavy polling? (in linux, using C or C++) linux serial-port share|improve this there difference because i merged the patch https://android-review.googlesource.com/#/c/195800, but it differed from our current code base, so i made some change to adopt the patch. symptom 1: logd.writer occupy 100% cpu.

Linux Cpu Load Average

See your CPU stats in realtime with Scout. website here There is probably little that needs to be done in this case, other than maybe find out who has started the process and talk about how you can help out! Linux Cpu Usage Command EDIT: Finding a solution to the problem of how to do other stuff while doing I/O would be an admirable feat, because it would at the same time be a solution Troubleshooting High Cpu Utilization In Linux The mind is a strange and wonderful thing.

I am now actually quite happy with 100% usage cause what everyone said is very correct, I just never thought about it that way. have a peek at these guys I lost my equals key. Troubleshooting On a busy server or desktop PC, you can expect the amount of time the CPU spends in idle to be small. Generally I find that slowdowns under heavy IO load are firstly because of poorly-architected software, or when that's not the case then because the system is using a single, slow disk Linux Top Cpu Usage

intelligence agencies claim that Russia was behind the DNC hack? Scout edit Understanding Linux CPU stats February 24 By Derek Posted in HowTo Comments Your Linux server is running slow, so you follow standard procedure and run top. The Server, as seen below, has two threads. http://smartnewsolutions.com/cpu-usage/what-does-cpu-usage-mean.html Any value greater than 256KB will need to be considered for development purposes since scaling issues start affecting the device in _this_ manner.

Does that mean server is healthy?1Medium CPU usage but high load6CPU overloaded but no proccess is using more than 1%-1How does process CPU usage relate to Load Average? How To Check Memory Usage In Linux The CPU usage for both computers was 0%. Thanks for the idea to actually test the application in a real way.

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This is generally called an underflow error. Feb 19, 2016 #26 [email protected] Hi Saly, I have found another issue about memoryleak in LogStatistics.h, you can check the detailed info in issue 201187. If in doing so it has to wait for I/O, it sits there and waits. Linux Cpu Usage Per Core If the niceness level is greater than zero then the user has been courteous enough lower to the priority of the process and therefore avoid a CPU overload.

The larger size does not scale in the face of pressure. If it blocks, that would not be as designed and would be concerning. The question is how to determine the optimum number of processes such that total throughput is maximized. this content We'll deliver a curated selection of optimization tips right to your inbox each month. Recent Posts Elixir foundations for Ruby Devs: Recursion 2016 Year-in-Review There's a Slim Linter in

However if it remains higher for long periods of time then it could be an indication that something isn't right. In opposite Linux is not initially graphical system, desktop is only 3rd party addition here. Does anyone know what that blue thing is? It is just a fact of life.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed and when the timeout happen, the reader will never get any content from logger_list, except close and reopen the logger_list. Applications can have an interfering signal and thus rationalize a retry. Learn how to build Ruby apps at scale.

So what you guys are saying seems to be correct. Join them; it only takes a minute: Sign up What is the issue of select() using so much CPU power? [closed] up vote 3 down vote favorite 4 I am writing If possible, check the other virtual machines running on the hypervisor, and/or migrate to your virtual machine to another host. Also just for uneeded reference my CPU is a 2.08Ghz AMD.

pruning takes 12% of the processing time to log. I did put a Sleep(1) in the client receive and the cpu usage went downt o 0%. Your transfer rate is literally as fast as you can pass the data across the stack. In this case, your processor will not continously check for elements available in the DMA FIFO, but you will need to add additional code to account for the potential underflow error.

Feb 22, 2016 #29 [email protected] Yes, the reason that I modify the buffer size to 2M is mainly for debugging. If at first you don't succeed, try writing your phone number on the exam paper. 08-30-2007 #8 robwhit View Profile View Forum Posts Registered User Join Date Oct 2001 Posts 2,129 How to change "niceness" while perfoming top command? In Linux oppositelly it does not feels so smoots and mouse sometimes lag even during normal web browsing.