Use of VxWorks memory - cRIO-9014

Similar Questions

• Details of allocation memory (cRIO vxWorks)

  Hello world

  A question about memory allocation when dealing with arrays, strings and string array.

  -I have to build and produce log files of the ASCII (LAS 2.0) on a cRIO.  The cRIO already done tons of other operations and avoiding excessive fragmentation of memory and overall memory usage is an important consideration for us, but CPU is also a limited resource... This new requirement is an addition to "everything" the cRIO already, and I know from experience that manages large data and logging as string files are taxing on the CPU, but also memory, so suggestions are welcome.

  Worst?) If I build the file whole by concatenation and set up the content of the file as one long string through one shift-register/ring to another, as it goes, more which I think is the worst possible way to do it from a management perspective of memory.

  (Better?) If I build the content of the file line by line and create an array of strings where each element of the array corresponds to a single line, it will be better? As each item is a variable length (String), I don't know how the memory manager manages these tables? Ideally, this is a list of pointers, so that each element (of variable length of the string) is its own segment (contiguous) memory vs all elements in the array in a single contiguous block? If so, that would mean that an array of strings would require nearby less memory than the same data represented as a 1 d of U8 array?

  An advantage I can think of the approach of the matrix (or line) is when it is time to write the data in the file, I could write each element of the array individually, once again, the idea is that there should be less overhead to manage the lines individually vs a giant stream on the disk memory?  I could then possibly construct/write of the file into blocks so that I'm never content of "whole file" in a row of table...

  Better yet? -Anyone have any ideas?

  Best? n ' matter who feel that they have completely tamed this beast? Do you want to share?

  As a mark of separation, unfortunately, all the data that will eventually be the file do not exist when the file is first created (trace-additional scans are added as soon as they are available throughout the day), and while the raw data itself in the LAS files are in the last section (so new raw data can be just added to the file of string without loading / parsing of the file) , there are some areas in the previous sections that may need to be updated (for example the tag STOP in the ~ section W), I was counting on the manipulation by a number of bytes for the fields that must be updated after the creation of follow-up, but if anyone has experience overview they can share on this subject as well , I am to listen to (in the case otherwise, I'll probably keep these counters in a list of attributes for quick recovery variant and simple because I maintain log files individual person well and therefore need a way a little more organized to follow that just a table or similar).

  Like that everyone would just learn to consume newspapers of PDM files we recommend that rather than insisting on all these other formats. :/

  (For a similar project (WITSML files), I ended up finding a relatively significant performance gain by building a large part of the ASCI file content as possible from the constant matrix U8, but luxury with this project was so much the structure/content of a static file that it was very, not to mention the WITSML requirement was for a scan/trace by file) , so it was create and forget.  It's been a HUGE calculate time and the difference in CPU usage.  Not sure this makes a real difference as far as its use/allocation of memory went other than constants of course being constant/charge with the VI and possibly optimizations the compiler as a constant U8 is potentially easier to work with than the strings (and string constants?).)

  I am logging the data locally on the disk with my different projects cRIO, because Yes, people just can not and will not use the TDMS files. What I do is I pre-allocate my paintings of strings - for example one the point current data to be logged out of the text file is an array of strings of 1 d, 1 item per channel, I have created by first creating an array of fixed size U8 (INIT 1 d array, say 16 bytes), conversion to string and then initialize my array of strings (INIT 1 d array again).

  I keep this saved allocated string of 1 d table change. When it comes time to write a new line to my account, I browse the table, using a loop FOR and Place the item Structure (not), new values in connects.

  I do everything with CVT or variables shared so I just read the tags by program and do a 'chain of fractional' on them. To write the string in the file I keep a last number of bytes and simply go to the file position and write.

  So far I didn't problems with leaks memory or fragmentation - you see the largest continuous block only decrease and then remain constant.  My systems typically run a week to a month between resets.

  It sounds like you are already planning to do this: work with arrays of pre-allocated chain. I'd say it's the way to go.

• UDP error 61 the cRIO - but the use of controller memory is < ~ 70%

  Hi all

  I'm having a problem with a program that runs on a cRIO-9074.

  My controller code has 3 parallel processes (for the 3 banks in my controller) that each contain 3 while loops. Reads an array of FXP in a FPGA DMA FIFO values and pushes this table in a queue. The following loop then reads the table from the queue, it throws in a string, split that string in size of the UDP and puts these substrings in a second queue. The final loop reads a substring from the second queue and forwards via UDP.

  Basically, a producer - consumer consumer/producer-architecture.

  Now this works very well in my development version of spaghetti with just a first level vi code. To make things more readable even if I compacted things into subvis, using global variables when it is necessary to connect them.

  My code is executed, but I get frequent errors during the broadcast channels UDP:

  «UDP - 61 error: the system could not allocate required memory.»

  I checked the memory usage from NOR distributed systems manager and my memory cRIO has a pretty decent amount of overhead. The sampling rate reduction - and corresponding memory use - does not make a big difference to the system time can go errors before. Even by reducing the sampling frequency straight down and disabbling that all except a loop (e.g. a Bank), I always get errors.

  How I debug this?

  
  

• make a request using pt100 with cseries 9219 module and crio 9014

  How can I connect my module pt100 with series c 9219 module and crio-9014

  The description is in table 1, but they are signals and lines of the TEDS data COM. More information on TEDS found on page 11 of the manual and a page of links to http://www.ni.com/white-paper/3468/en.

• deploy programmatically variable shared within the standalone version of RT (cRIO-9014)

  Hello

  I have a question about here to use variables shared single process within the standalone version of RT for the cRIO-9014

  I simplified my request of LV (LV2010) in two to test the use of shared variables.  See the attached file.

  (1) only run on the host PC: testHost
  (2) only works on the cRIO-9014: testRTcRIO

  for both, I packed stand-alone executable and source distribution.

  for testHost,.
  (a). I copied \builds\testcRIO\Host to d:/or-rt/xmlrpcFEU source Distribution...
  (b) I run... \builds\testcRIO\Host.exe
  (c) xmlrpcFEUlog - host.txt is generated.

  for testRTcRIO,.
  (a) .d FileZilla to connect to the target of RT on network, I copied... \builds\testcRIO\Source Distribution\c\ni - rt\xmlrpcFEU

  to/or-rt/xmlrpcFEU on the target of RT
  (b) I copied also... \builds\testcRIO\Real-Time Application\c\ni - rt\startup to/or-rt/startup on the target of RT
  (c) Max, I restarted the cRIO-9014.
  (d) xmlrpcFEUlog - RT.txt is generated.

  We see that the shared variable does not work inside the RT target. but worked well on PC. the deployment programmatically method does not work.  any suggestion?

  Another thing is:
  can I use telnet for the RT 9014 target and start the RT app directly? What is the command inside the terminal telnet RT?

  Currently, I can telnet into the cRIO-9014, but, what I can do with it?

  ================
  220-national Instruments FTP
  220 service Ready

  530 journal please with USER and PASS
  USER
  331 user name okay, need password
  PASS
  230 user logged
  Help
  211 - USER PASS ACCT STRU TYPE
  211-MODE CWD XCWD PWD XPWD
  211 CDUP XCUP PASV, RETR, REST
  211-PORT LIST NLST QUIT SYSTEM
  211 STAT HELP NOOP STOR, APPE
  211 STOU HELLO MKD XMKD RMD
  211 XRMD DELE, RNFR TRAVEL SIZE
  211 MDTM
  ===========================

  Concerning

  Xiaofeng

  
  

• cRIO-9014 & RS232

  I take my first steps with a cRIO 9014 - for a running on the target FPGA VI, is it possible to use the RS232 port on the cRIO as output?

  Hi SamD,

  In response to your question, I make a few assumptions. I guess that your VI is running on the FPGA in your cRIO. In this case, the answer is no. Only the target in real time can access the serial port, so you would need to provide an interface between the FPGA and the serial port (running on the target RT).

  I've also attached a knowledge base article that explains how to implement RS - 232 with FPGA hardware OR but you would need to add some additional hardware to do this. I recommend the Developer Zone article.

  I hope this helps.

  Thank you very much

• cRIO 9014, FPGA compiler error

  I use cRIO 9014, that while the FPGA code compilation I get attached error.

  Please guide me ob who...

  Hi Olivier,.

  The displayed error is clear.

  Your system time is older than the time of installation.

  Change to correct time and try it...

  In addition, if you change your system time (IE computer), some software will not work. (another example is Gmail. Try to connect to Gmail after year settting in the previous year in your system. It displays error SSL.).

• Why firefox uses so much memory?

  For several months, Firefox has eaten memory like crazy. Once I get more than 5 tabs open or that you have Firefox running for more than an hour, the memory usage hit about a GB. If I continue to let go beyond that, it will hit 1.5 to 2 GB and it made my gel set office. I got to keep the Task Manager and every hour or so just kill Firefox and restart. Preventing it from crashing my whole desktop computer. It's definitely worse when I opened Google products, especially maps and Docs. GMail is generally OK.

  I tried to disable literally every add-on and Extension (including Flash and Adblock).

  I'm on Windows 7, I have 4 GB of RAM installed. I am on version 40.0 Firefox, but this has happened through a few updates now (I think the problem started around March or April). I also tried to back - rev Firefox and go to the latest version, that I had before the problems started, but that did nothing either.

  Chrome works fine on this machine without any similar problems - but I prefer Firefox!

  Separate the issue;
  Shows details of the system;

  Plug-ins installed

  Adobe PDF plugin for Firefox and Netscape "9.5.5.
  is obsolete

  Firefox using too much memory (RAM) - how to fix
  This article describes how to make Firefox use less memory to make it run faster and prevent accidents.

  https://support.Mozilla.org/en-us/KB/Firefox-slow-how-make-it-faster

  https://support.Mozilla.org/en-us/KB/Firefox-uses-too-many-CPU-resources-how-fix

  https://support.Mozilla.org/en-us/KB/Firefox-hangs-or-not-responding

• My Safari is using too much memory

  I use Safari 9.1.1 on my iMac (OS X 10.9.5)...) Last week, Safari uses too much memory causing my computer to slow down and own memory has automatically free up space.  I use the same sites in multiple windows.  But it will bring my RAM available to a dangerous level of 2 MB...

  Memory will make things worse. The amount of RAM is installed?

• Firefox using too much memory

  Hello

  I had this problem a weakness there, I made any suggestion that this link said and it did not help:

  https://support.mozilla.org/ar/kb/firefox-uses-too-much-memory-ram#w_disabling-memory-consuming-plugins
  

  I have no many taps oppened taps only 47.
  My firefox now usiing 2 GB ram, can someone help me how to fix it?
  Thank you

  I tried 'back of ram' add and activate acceleration on my GPU and it worked, it did not use more than 200 MB with the same number of notches before

  Thank you very much

• AVG says using too much memory because multiple firefox is open, but I only see one.

  AVG regularly analyzes in the background. Lately he has demonstrated a popup window that says multiple applications of Firefox are running and using too much memory, so I should close some. But I can only see 1. Tried CTRL ALT DEL to see if I could find the answer, but only showed 1 firefox, and that he used more than 28 000. So I think that AVG is correct, but does not know how to see what who or where they are. They DO NOT display in the lower menu on the main screen, so I guess they are in the background. Do not have the virus, and Firefox, regularly updates itself. What should I do to fix?

  Hi cmich80220.
  It is true, that you should only be able to run only one instance of Firefox at the same time. I searched but could not find someone else with a similar problem. If the problem comes back to Firefox running slowly, you can consult this article for troubleshooting:

  [Firefox is slow]]

  Hope that helps.

• Question about the use of the memory modules

  I have a dilemma between the use of a new 1 GB memory (what I intend to buy) with more speed
  and by using the 1 GB + my old 256 with less speed
  which option will contribute more?

  Hello

  The fact is that if you use 2 different memory modules with different properties (of lower performance) so the laptop can run with lower performance. This means that the 256 memory module slows down you memory. The best way is to use the same modules having the same properties.

• ITunes is downloading all items purchased from my iPhone, including tv shows and movies, using all the memory and batteries

  ITunes is downloading all items purchased from my iPhone, including tv shows and movies, using all the memory and batteries, does anyone know how to stop this?

  Hi anthony248,

  If you don't want the automatic downloads enabled on your iPhone, follow the steps outlined in the article below, except that you will turn off the switch rather than turn them on.  I'll also include a link about the storage capacity of your iPhone and how to delete items that you don't want.

  Turn on automatic downloads

  Check your storage space on your iPhone, iPad and iPod touch

  Take care

• VI by using too much memory

  Hi all

  I am trying to write a code for pic Pic 2 dimensional on a large enough data file (about 1000 x 72000 points). The results of this should be integer values where each peak has been reduced to its maximum point for later statistical analysis (see attached code). The problem is when this code is executed, the VI quickly eat through all of the available memory and crashes. I'm under a system with 3 processors and 4 GB of ram, and the program has crashed every time after using approximately 3.5 GB, so I need to find a way to reduce the use of the memory of this VI. My VI and an example of data file is attached. Thank you.

  <><>

  First of all, read 1000x72000x8bytes = ~ 600 MB for one copy in memory is pushing it. Then you have additional copies in the two graphs.

  All your values seem to be small integers, so a U8 2D table would work just as well using 8 times less memory space.

  Then you send these massive arrays of two graphs of intensity. The number of pixels in your chart is a small part of the picture, so you will have to reduce the data to display. Graphical representation of the 72000 columns on a less than 1000 pixels wide screen is ridiculous.

• Acquisition of images with 3 USB cameras causing too many uses of the memory/cpu

  Dear experts,

  I'm trying to capture images with 3 cameras USB, located in 3 different positions. I have to initialize each cameras using USB list vi camera when switching between cameras. I realize that, by making this method causing too many uses of the memory/cpu and can cause CPU hang up. If I stop the program, the memory/cpu counter are down.

  Do you know how to reduce this problem.

  Thank you

  Hart