Leak of TCP/IP

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• TCP memory leak?

  I have a (attached) relatively simple TCP server.  When localhost is connected from a client, the server runs without developing memory, however, when it is connected from a network client, that the memory of the server usage develops quickly.

  Two instances of this VI server are dynamically opened and run from the main VI of the application, each with a separate listening port as input.

  This VI was built using LabVIEW 8.2.1.  No problem memory occur if no clients are connected.

  What Miss me?

  It is difficult to say without the globals missing and other info. Here are a few ideas:

  • Try to create the listener once outside of the big loop, rather than create a new port listening every two seconds (or after each connection). Close the connection after the large loop has finished.
  • When the error of the big deal condition occurs, you have generated a connection ID never gets closed. Can you probe, how many times an error occurs here and if so, what is the error you get?
  • It is possible that when you close the connection and then immediately try to create a new port to listen on the same port, the port might still be in use to finish the old connection.

  You can attach a fully functional set of screws (client and server) that illustrates the problem?

• Modes of failure in TCP WRITE?

  I need help to diagnose a problem where TCP communication breaks down between my host (Windows) and a PXI (LabVIEW RT 2010).

  The key issues are:

  1... are there cases where to WRITE TCP, a string of say 10 characters, write more than zero and less than 10 characters for the connection? If so, what are those circumstances?

  2... is it risky to use a 1ms timeout value?  A reflection seems to say that I won't get a timeout in uSec 1000 if we use a database of time 1-ms, but I don't know if this is true in PXI.

  Background:

  On the PXI system, I use a loop of PID-100 Hz, controlling an engine.  I measure the speed and torque and control the speed and the throttle.  Along the way, I am in a position 200 channels of various things (analog, CAN, instruments of TCP) at 10 Hz and sending masses of info to the host (200 chans * 8 = 1600 bytes every 0.1 sec)

  The host sends commands, responds the PXI.

  The message protocol is a type of variable to fixed header, payload: a message is a fixed 3-byte header, consisting of a U8 OpCode and a USEFUL of U16 load SIZE field. I flattened a chain structure, measuring its size and add the header and send it as a TCP WRITE.  I get two TCP reads: one for the header, then I have the heading unflatten, read the SIZE of the payload and then another read for that many more bytes.

  The payload can be zero byte: a READING of TCP with a byte count of zero is legal and will succeed without error.

  A test begins by establishing a connection, configuration tips, and then sampling. The stream of 10 Hz is shown on the home screen for 2 Hz as digital indicators, or maybe some channels in a chart.

  At some point the user starts RECORDING, and 10 Hz data go into a queue for later write to a file. It is while the motor is powered through a cycle prescribed target speed/torque points.

  The registration lasts for 20 or in some cases for 40 minutes (24000 samples) and then recording stops, but sampling does not.  Data are still coming and mapped. The user can then do some special operations, associated with audits of calibration and leaks, and these results are stored.  Finally, they hit the DONE button and the mess is written to a file.

  This has worked well for several years, but that the system is growing (more devices, more channels, more code), a problem arose: the two ends are sometimes get out of sync.

  The test itself and all the stuff before configuration, works perfectly. The measure immediately after the test is good.  At some point after that, he goes to the South.  The log shows the PXI, sending the results for operations that were not opposed. These outcome data are garbage; 1.92648920e - 299 and these numbers, resulting from the interpretation of random stuff like a DBL.

  Because I wrote the file, the connection is broken, the next test he reestablished and all is well again.

  By hunting all of this, I triple-checked all my shipments are MEASURES of the size of the payload before send it.  Two possibilities have been raised:

  1... There is a message with a payload of 64 k.  If my sender was presented with a string of length 65537, it would only convert a value U16 1 and the receiver would expect 1 byte. The receiver would then expect another heading, but these data come instead, and we are off the rails.

  I don't think what is happening. Most messages are less payload of 20 bytes, the data block is 1600 or so, I see no indication of such a thing to happen.

  2... the PXI is a failure, in certain circumstances, to send the entire message given to WRITE of TCP.  If she sends a header promising more than 20 bytes, but only delivered 10, then the receiver see the header and wait more than 20. 10 would come immediately, but whatever the message FOLLOWING, it's header would be interpreted as part of the payload of the first message, and we are off the rails.

  Unfortunately, I'm not checking the back of writing TCP error, because she's never not in my test here (I know, twenty lashes for me).

  It occurs to me as I was him giving a value of timeout 1-mSec, since I am in a loop of 100 Hz. Maybe I should have separated the TCP stuff in a separate thread.  In any case, maybe I do not get a full 1000 uSec, due to problems of resolution clock.

  This means that TCP WRITE failed to get the data written before the time-out expires, but he wrote the part of it.

  I suspect, but newspapers do not prove, that the point of failure is when they hit the DONE button.  The General CPU on PXI is 2 to 5%, at that time there are 12 to 15 DAQ field managers to be close, so the instant the CPU load is high.  If this happens to coincide with an outgoing message, well, perhaps that the problem popped up.  It doesn't happen every time.

  So I repeat two questions:

  1... are there cases where to WRITE TCP, a string of say 10 characters, write more than zero and less than 10 characters for the connection? If so, what are those circumstances?

  2... is it risky to use a 1ms timeout value?  A reflection seems to say that I won't get a timeout in uSec 1000 if we use a database of time 1-ms, but I don't know if this is true in PXI.

  Thank you

  If a TCP write operation times out, it is possible that some data did in fact get placed in the buffer, and it will be read by the other side. This is why there is an output bytes written on TCP Write function, to determine what was actually put in the buffer.

  To account for this, you can proceed as follows:

  1. do an another TCP write and send only the subset of the first package that does not get completely passed. Use bytes written to Get String subset for the remaining data.

  2. start with greater delays.

  3. in the case of a timeout, the close link and force a reconnection so that the data of the partially filled buffer not get transformed by the other side.

• Since the upgrade to Sierra MediaLibraryService is causing a memory leak

  Hello.

  I upgraded to Sierra, since as soon as Itunes is launched, the com.apple.medialibraryservice is originally a large memory leak, it keeps in ram more until she takes all (16 GB) and significantly slows down the computer.

  I tried to reset the nvram and smc memory, doesn't change anything.

  Does anyone have an idea on what is causing this leak and is there a solution?

  Yes, I noticed this also. After that I opened iTunes, it's just a matter of time before all the memory gets used up and all departure is wobbly. In particular, bluetooth really gets bug after a certain time, and as soon as I quit iTunes, that's fine.

• I want to remove the LEAKS of NENE App and I'll get my MAP of FLOW Changed

  I need to stop NEE - NEE LEAKS APP because I don't use it and don't want it not what I unless he does more.

  Just delete it.

  Don't know what you're asking

• iCloud to leak memory in Windows

  iCloud for Windows participated in a memory leak which crash the Windows explorer.exe. The error that is displayed is:

  

  This question goes back a little...

  Check out this discussion > iCloud blocks my explorer.exe

• There seems to be a MAJOR problem (blocking/memory leak) in "subject: House", also known as the Firefox Start Page, at 26.0 Firefox on Windows!

  There seems to be a MAJOR problem (blocking/memory leak) in "subject: House", also known as start up Firefox, 26.0 Firefox Page, Windows!

  seen on:
  -Windows 7 x 64 machine with 12 GB of RAM and high performance CPU (core i7-920)
  -Comments Machine virtual WinXP SP3 (in Oracle VirtualBox) running on the same computer
  -Intel Atom D525 netbook with 4 GB of RAM, running Win7 x 64

  None of these machines are connected through Sync or something like that. The Firefox instance on the virtual machine is a fresh install / clean.

  The problem:
  -100% of cpu usage for 10 seconds, (util in XP) memory usage goes up to 1.7 GB
  -If "subject: House" is actually the Firefox Start Page, it blocks the computer at startup of Firefox for 10 seconds
  -If "subject: House" isn't the Firefox Start Page, startup is fine - BUT if I press the "home" on the toolbar button it loads "on: House" which causes the same question once again

  Sounds that there is a problem with one of the code snippets that are responsible. I've seen several reports on this issue.

  You can set the browser.aboutHomeSnippets.updateUrl pref an empty string on the subject: the page of config to disable loading (new) checked to see if that helps.
  
  You can open the topic: config page through the address bar

  • http://KB.mozillazine.org/about:config

  You must remove the ' storage\moz-security-about + origin "folder in the folder of Firefox to delete already profile stored clips.

  You can use this button to go to the Firefox profile folder:

  • Help > troubleshooting information > profile directory: see file (Linux: open the directory;) Mac: View in the Finder)
  • http://KB.mozillazine.org/Profile_folder_-_Firefox

• On firefox memory leaks cause blue screens?

  On firefox memory leaks cause blue screens?

  If you encounter blue screen crashes, this majority refers often to an incompatibility with a device driver, especially the graphics drivers. Go to Firefox Safe Mode and disable the use of Firefox hardware acceleration of graphics.

  Assuming that Firefox is closed:

  Hold down the SHIFT key when you start Firefox. You should get a small dialog box. Click on 'Start mode safe' (not reset).

  (If Firefox is running, use Help > restart with disabled modules to call the dialog box.)

  In Firefox, open the Options of the Advanced tab dialog box:

  the button Firefox orange (or the Tools menu) > Options > advanced

  In the mini ' General' tab, uncheck the box for "use hardware acceleration when available.

  This will take effect after you exit Firefox and start it up again (in normal mode).

• Massive memory leak Safari

  Since the installation of OSX v10.11.5 my Safari has developed a massive leak, making it unusable. I can look in the activity monitor the RAM is typed, then passing slot, making me have to force quit Safari, whenever it is open.

  Everyone knows this?

  Please, back up all data before proceeding.

  Triple-click anywhere in the line below on this page to select this option:

  ~/Library/Safari

  A right click or Ctrl-click on the line and select

  Services ▹ Open

  the contextual menu.* should open a folder named "Safari". Quit Safari runs. One or more files in the open file must have a name starting in 'history '. Move these files and only those which, on the desktop, leaving the window open. Restart the application and test. If there is no change, leave again and put the files that you moved back where they were, crushing those who could be created in their place. If not, remove the files that you moved. The browser history will be empty. If possible, restore deleted files from a previous backup problem.

  * If you do not see the item context menu copy the selected text in the Clipboard by pressing Control-C key combination. In the Finder, select

  Go ▹ go to the folder...

  from the menu bar and paste it into the box that opens by pressing command + V. You won't see what you pasted a newline being included. Press return.

• Open the TCP Port

  I'm trying to implement a TCP port to listen to music on my home network through JRiver. The server and work remotely on my home network. But I want to access on the network side.

  I use ATT Uverse to access the internet. I disabled wireless and ATT modem to transmit to my Airport Extreme.

  I have these instructions to configure the port:

  1. Open AirPort Utility and change your AirPort Extreme or AirPort Express. Select the tab network (image). Select the sign of closer Port settings box. The Type of Firewall entry should be IPv4 Port Mapping. Enter a description like JRiver Media Center. Enter the Public 52199 TCP Port. Enter the private IP address, it's the IP address of your JRiver Media Center PC at home. Enter the TCP Port private 52199. Click on save, and then click Update. (image)

  When coming to this page, however, the firewall main entry box Type "IPv6" entered and grayed out, so it cannot be changed.

  Any help would be greatly appreciated.

  Sorry, but no image is available.

  However, to start, running the AirPort Utility > select the AirPort Extreme > change > Internet tab > Internet Options...

  What is the value to configure IPv6? If it is 'Automatically', change it to "Link-local." only (Note: I'm assuming that your ISP DO provide you IPv6 service still.)

• Firefox memory leak <! DIFFICULTY! >

  Hello fellow Firefox users!

  For most of us, Firefox suffers from a memory leak crazy, this can cause slowdown and perhaps even crashes. This happens mainly because when you close the tabs, the RAM, they took is always taxing your computer. Among other things cause this annoying leakage.

  -SOLUTION-
  Recently, I switched to Firefox and has this leak. I would not put upward with him, so I put solutions. Here's what I came with.

  Some addons I've handpicked, which when combined, are extremely effective.

  RAMBack
  https://addons.Mozilla.org/en-us/Firefox/addon/RAMBack/?src=SS

  MemoryFox
  https://addons.Mozilla.org/en-us/Firefox/addon/memory-Fox/?src=search

  MemoryRestart 1.1
  https://addons.Mozilla.org/en-us/Firefox/addon/memory-restart/?src=SS

  -IN ADDITION-
  Firefox slow acting? Try these great modules!

  SpeedFox 0.9.11
  https://addons.Mozilla.org/en-us/Firefox/addon/speedfox/?src=search

  DownThemAll
  https://addons.Mozilla.org/en-us/Firefox/addon/DownThemAll/?src=search
  ________________________________________________________________________________________________________

  Get all these together and make a leak free and faster Firefox!

  Additional details of the system

     Windows Vista
     Firefox 9.0.1
  

  More information

  Front of Add-ons
  Firefox could take up to 512 MB and up, leading to problems.
  Firefox could take some time to load the tabs sometimes.
  Download was OK.
  After Add-ons
  Use Firefox NEVER more than 512 MB, typically stays around 300 MB.
  Firefox almost NEVER slows down.
  Downloads go up to 4 x the average speed.
  ______________________________________________________________________________
  Computer information
  Windows Vista
  4 GB of ram Ram HQ
  Firefox version 9
  3.0 MHZ AMDPhenII QuadCore
  NIVIDIA, VideoRAM 2048 DDR2

• iPad Pro screen light leaks

  I just got my new iPad Pro 9.7 128 GB. After unpacking and open the unit, I found a white spot on my screen near the front camera. It will appear only when my background is white and will not appear when the background is black. I think that my device screen light leaks. I fear it has become worse as more big white point? Help, please! What can I do?

  

  The United States, you can return it to Apple "without question" within 14 days of the purchase.

• When firefox crashes of a memory leak, why you can not display the offending tab? Improvement: a task manager as Manager of the display use by tab tab / extension.

  I generally keep windows with multiple tabs open. It is possible that this causes more accidents because the number of pages multiplies any effect that the majority of users with less pages/tabs would suffer. I had problems with Firefox blocks Manager Windows that I looked into this question a lot of variables to track tasks to help. Bottom line, the accident is caused by increasing the memory usage may be caused by the flash add on which fact much IO reads at least a page/tab incriminated could some sites use flash to read my disc without permission, and there is a leak memory in a flash of code uses the sites? I searched the Web for a task manager as add-on for Firefox tabs that would determine the offending page/tab/add-on/extension. This seems an excellent idea which has not been implemented. Since I am a developer, I would be happy to implement, but would like some advice because my knowledge of your product is only at the level of the user.

  There are currently: page of memory that is actively developed. A "task manager" of all kinds is also in the works as far as I KNOW. If you want to help, your best bet is to find the bug there is Bugzilla. If you have the skills coding I can help you in touch with a mentor - let me know.

• plugin - container.exe takes up and uses 100% of my CPU locking me and leaving my non-functional PC. Is it a bug or a memory, leak in the Firefox software? Can we do anything to solve this problem?

  Looking at the Windows Task Manager, I found this plugin - container.exe took over 100% of my CPU and my system froze. Is this a leak memory or another bug?

  plugin - container.exe is simply a third wrapper 3 plug-ins. This plug-in is loaded? The bug is with this plugin (Flash for example)

• Satellite U500 memory leak - 18 p

  I have PSU8CE 18 p Satellite U500 with preinstalled Windows7 Home Premium x 64 with 4 GB RAM. When I start mode safe then memory not sunk. When I start it in Normal mode then nonpaged kernel memory develops up to 3011 MB (~ 4 days running).
  
  I downloaded poolmon.exe and Crescent pool tag found: "AmlH" (ACPI AMLI Pooltags). In safe mode, this pool has 1 single allocation unit. In Normal Mode ~ every 73 seconds he returned new unit. Size of each unit is 524288 bytes.
  
  Then I downloaded and installed "Windows Performance Toolkit" and run xperf.exe and xperfview.exe according to
  
  http://blogs.msdn.com/b/maartenb/archive/2010/12/07/debugging-pool-leaks-with-x-perf.aspx.
  
  XperfView watch battery to leak memory in the
  
  Rootntkrnlmp.exe! KxStartSystemThread/ntkrnlmp.exe! PspSystemThreadStartup/ACPI.sys! ACPIWorkerThread/ACPI.sys! RestartCtxtPassive/ACPI.sys! InsertReadyQueue/ACPI.sys! RunContext/ACPI.sys! ParseTerm/ACPI.sys! Return/ACPI.sys! DupObjData/ACPI.sys! NewObjData/ACPI.sys! HeapAlloc/ACPI.sys! NewHeap/ntkrnlmp.exe! ExAllocatePoolWithTag
  
  I restored windows to State factory but still present memory leak.

  Memory leaks are a common error in programming.
  leak memory occurs when a computer program consumes memory, but is unable to release it in the operating system.

  In your case, it would be necessary to know what application or process that runs in the background do
  This can be very long process you would need to install a system of fees will need to check the memory leak after each installation of driver or another application