number of items in the queue

Similar Questions

• Number of items in the target to host DMA FIFO

  Hello world

  I would like to transfer a set of datapoints of an FPGA to a RT-host controller using a fifo DMA. If I use the 'Get number of items to write' function on the FPGA target, can I get the total number of items in the two buffers, or just one on the FPGA target?

  (see http://zone.ni.com/reference/en-XX/help/371599H-01/lvfpgaconcepts/fpga_dma_how_it_works/)

  

  markus_a wrote:

  If I use the 'Get number of items to write' function on the FPGA target, can I get the total number of items in the two buffers, or just one on the FPGA target?

  The FPGA will have no idea how big the DMA is on the side of the host.  He can't see his own DMA buffer.

  Get the number of items to write just tells you how many items are not used by the DMA (ie the number of items that currently write to the DMA without waiting for items to be offered by the host reading).

• HP envy 4501: unable to delete the item in the queue

  I am trying to delete an item in the queue of the printer, but it will not erase. I am not able to print anything else, until this item is deleted. The article shows that it is deleting, but has been like this for 2 days. Can someone help me with this problem?

  Hello

  I think you need to delete the queue. For Windows, try it please:

  Hold down the Windows key and press R.
  from the run window, type services.msc and press to enter.
  If the computer asks you to Admin, you have to accept that,
  regarder watch down to the print spooler service, right-click and select Properties
  Click the Stop button,
  Go to C:\Windows\System32\Spool\printers
  delete the job inside this folder
  restart the machine.

  Kind regards.

• How can move items in the queue of 1 printer to another

  the title is the question... There are 2 printers put in place, just one, the disposable items in the queue and I want to move them.

  Jobs that are already in the queue are files that were produced by the printer driver and therefore include the printer controls that are specific to this printer.  Directing to the queue print on a second printer will only work if the second printer can correctly interpret the commands to the printer to be the first printer.

  If the second printer is of the same type as the first, the simplest method is to temporarily redirect the port assigned to the second printer.

  1. Go to printers and faxes
  2. Right-click on the icon for the 'good' printer and select Properties, then click the Ports tab
  3. Scroll the list of ports and make a note of the port to which the 'good' printer is made (one with a check) click on Cancel to close the Properties dialog box
  4. Right-click on the "disposable" printer icon, select Properties, and then click the Ports tab
  5. Make a note of the port which is checked, uncheck it and check the port that you noted in step 3.
  6. Click OK

  If the printers are not identical models, but at least the same type (laser, inkjet, matrix), it can work.  The closest to the printers are, it is likely that the print job prints correctly.

• Dell V305W printer unable to print and remove items from the queue

  Original title: Dell V305W printer

  Cannot get my printer to work.  the queue contains 2 documents.  I can remove all but one.  under status it says delete but it does not delete when I try to cancel it.  all of the suggestions.  Thank you.

  I solved the problem.  I turned off the computer and the printer and when I rebooted, I was able to delete the item in the queue.  Thanks for your reply Zhang.

• Display the number of items in the Favorites/Wishlist?

  Is there a way to display a number of items in the Favorites/wishes? Support of BC said it might be possible with liquid markup, but I don't know how to do this.

  I would like to have a link to my page of favorites in my head that would show a total of points inside.

  My Favorites (3) | Close the session

  Can someone help me?

  Hey Evan,

  Check this how-to to learn more about this point - developers

  It is perhaps not exactly what you are looking for, however, is how you should speak and with some improvements in the code, you should be able to implement what you are looking for.

  - Abhishek Maurya

• How to remove the number of items in the history, bookmarks...

  How to quickly remove the number of elements in the bookmarks, history...
  also how to cut, copy, paste items on web pages.
  . Is there a program like Snagit as eorks on samsung Tablet?

  Go to the menu then settings and find "clear privΘes.

• Change the number of items in the drop-down list box when running

  I'm trying to change the number of items in one of my boxes of comobo.

  I have been through the help and this forum and have the values to within the drop-down list box change very well, but in a scenario, I want to go to three options for 2. And according to other choices to 3.

  I guess I have to use a property node but I can't understand that one.

  You can use the method to reset to zero (using an invoke node) before setting the [Strings] (after setting the value by default an empty array) or create an Xcontrol (you can see examples of LabVIEW for xcontrol).

  Ben64

• How get the number of items in the ListView inside QML?

  QML/JavaScript newbe question here please.

  Suppose I have .qml

  import bb.cascades 1.0
  
  NavigationPane {
      id: navigationPane
      Page {
  ...
          Container {
  ...
                ListView {
                      id: listviewPlayers
  ...
  

  and I want to do something if ListView does contain all of the elements

      onCreationCompleted: {
          // this slot is called when declarative scene is created
          if (listviewPlayers.AllItems.count() == 0){
              // do something;
          }
  

  but when I run the present I get complain AllItems is not defined in this line:

   if (listviewPlayers.AllItems.count() == 0){
  

  What I doing wron? I can do the same thing in C++ without any problem.

  Thank you.

  Oh, this thing AllItems seems to be a 'Sentinel' or a magic value used in special cases, unrelated to this.

  I think that ListView manages all this, but defers everything to do with the pieces of data to the model, you don't have to go to the model for the data. ListView knows how VisualNodes (the components list item) he created at the time of the display on the screen, but also have to tell you the total number of elements in the model would simply duplicate work. (The reasoning behind this interpretant.)

• Number of items in the pipe delimited string by the

  Hello

  Is it possible to count the number of items produced by LISTAGG?

  For example, if product LISTAGG:

  Jan, Feb, Mar: output should be 3

  Jan, Mar, Apr, Dec: output must be 4

  Hello

  I see it; LISTAGG has nothing to do with this problem.

  REGEXP_COUNT can tell you how many times a particular pattern occurs in a string:

  SELECT REGEXP_COUNT (delim_str, "[^ |]") +') AS num_of_months

  delim_str

  OF tmp_table

  ;

  Output of your sample data:

  NUM_OF_MONTHS DELIM_STR

  ------------- ----------------------------------------

  4 jan | Feb | Mar | Apr

  5 jan | Feb | Mar | Apr | May

  6 jan | Feb | Mar | Apr | Can | June

  7 jan | Feb | Mar | Apr | Can | June | July

• Why do I see a large number of entries in the queue of my printer

  
  

  I'm sorry you have a problem with the list of documents in the print queue.

  In this same window 'see what's printing', click on the printer (on top left). Choose DELETE or CLEAR queue.

  See if that helps. Otherwise, you can stop and restart the printer spooler. Do you know how?

• Number of item in the dynamic Table Quirk

  I am a new user of LC, ramping up the speed on this package, thanks to all for the useful information here and elsewhere.

  By using the tips and info here,

  http://www.assuredynamics.com/wp-content/uploads/2010/11/assure-Dynamics-building-dynamic-tables.PDF

  I added a dynamic array of a form, I've worked on that.  Mostly, everything works, except the legend on the number of line/article.  So I yanked on the subform with the table top to create a single copy of the form to post here.  Get this... it works on the simple form.  So there is something to do in my not so simple form which prevents my line/workstation number.

  I hope if I post here the two forms, can someone help me solve this thing.

  It's the form that works:

  http://inthequeue.com/adobeLC/Template_excerpt.PDF

  It's the shape that doesn't work:

  http://inthequeue.com/adobeLC/Template_std.PDF

  Thanks in advance

  John Q.

  Hi John,.

  Try to change the code in the layout event: ready to go;

  This.Caption.Value.Text = (this.parent.index + 1) m:System.NET.SocketAddress.ToString ();

  TO;

  This.Caption.Value.Text.Value = (this.parent.index + 1) m:System.NET.SocketAddress.ToString ();

  It's adding another "value".

  Your form that works target Reader 8.0 or later and who only targets Reader 9.0 or later, I guess that's the difference.

  Concerning

  Bruce

• Writing in the spreadsheet with the queue

  Hello

  I am a beginner with queues and I have a few questions.  I have attached a simple example of code that I wrote to better implement a consumer who can queue data and write on a worksheet after running the code.

  First of all, I noticed that the queue still has residual remaining after the code ends.  It then writes this element to the file to run the vi.  I can't figure how to get rid of this element.

  Second, anyone have any suggestions to improve this code?  I've been playing with it for quite some time and I finally got to work like that, but it is certainly configured differently from the other examples I've seen.

  Thirdly, I am reading the number of items in the queue, but the two in the loop of the producer and the consumer, told me that there is no element.  How can this be?  My output file seems to work and I certainly put items in the queue.

  Finally, in the future I'll use data from the queue in two places.  Here I've implemented a notifier to do the job.  This is the best method?

  Thanks for your help!

  Jason

  The reason why you do not get the last element of the queue (at least not until you restart the VI) is that you have your automatic indexation tunnel that collects all the data to send to the writing on file SS service cable for moving to register.  So this last piece of data from the queue to get into the shift register, but it is not getting into the 2-D chart by the tunnel of automatic indexing up to the next iteration of the loop.  When you rerun the VI, as the shift register is not initialized, it is already there and became the first point of your next data execution.

  Why did you put the register shift in?  Just remove and just use the tunnel of automatic indexation.

  I don't know what you really want to do with the 2nd loop to say if the Notifier is correct or not.  But if you do not want to lose data in the other loop, then you need to use a second queue and have your producer loop enqueue data in the two queues, a queue for each consumer loop.

  With regard to the elements draws in the queue, seeing how your code is configured, the queue will almost always empty because the dequeue function will be ready to pull out the element immediately after the enqueue function puts in.  Unless you have your loop producer much faster than your consumer loop running, you will not see a build up of the elements.  (Try putting an expectation of more of 100 msec in your loop of consumer.  Then you will see elements accumulate in the queue.)

  I don't know why you put the spreadsheet feature writing after the loop.  Normal use for queues in an architecture of producer/consumer must transmit the data to a separate loop that contains the functions write file.  This way he can work at his own pace, but write the data and make sure that you do not lose it.  As you have now, if your code runs a long time, you may run out of memory when at the tunnel of automatic indexing table becomes too large.  And if your application crashes before you complete it with your stop button, then all data are lost because you did not it writes the file.

• Probe provides incorrect information on the status of the queue

  In LabVIEW 2009, the probe provides incorrect information on the status of the queue. I got and queue without name, did a Flush queue and queue 5 times zero double precision values. Function Get queue status display 5 items in the queue, but a probe placed on the queue outside (queue Refnum) wire displays:

  "queue [11] out without name - 0 items from queue - 0xbd600008"

  I can't get a probe to correctly display the number of items in the queue when I place it on one of the queues of the son.

  Why the probe displays a number of items in the queue?

  dbaechtel wrote:

  Why the probe displays a number of items in the queue?

  It's a bug.  I was able to reproduce the results of dbaechtel.  I tried to fathom in several places and got "0 queue" in all places.  Name of the queue does not affect the outcome of the probe.  It must be a bug.  However, the elements # in the output queue of the waiting state is correct.

  

• Sequential simultaneous writing of the queue

  Hello everyone, nice day.

  I have what should be a very simple matter.

  I'm currently implemented a producer consumer-consumption-consumer architecture. (Loop acquisition > write disk acquisition > read data from disk data > display of the user based on the data.) In plain language, I have a created the data loop, a loop of these data, a loop of disc storage and a loop displays a user interface. (This isn't supposed to be a real-time application, and I am aware of the charge created by the writing and the reading of the disc). Just stick with me on this one.

  So my problem occurs concerning the second loop. This loop is responsible to write the data be queued (produced in the loop 'Acquisition') on the disk. The problem is also, feeds on a queue to the loop of "reading disc". This configuration causes a few obstacles. The main obstacle arising from the nature of queues of LabVIEW. The loop "write to disk" writes only a part of the queue of the 'Acquisition' at the same time. This general is not really a problem, until you consider that this loop also determines the execution of the loop of "reading disc", with the use of queues. As a result, this loop determines the rate of the next loop and was therefore likely to slow demand and leave a large number of items in the queue. In addition, you must keep in mind, I'm only queueing about 7 MB of data per element, and my HARD drive has a write speed average of 60 MB with a 64 MB cache. Therefore, my installation I can only write one item at a time, therefore making me use only 7 / 60MB of bandwidth from my drive.

  My question is; It be possible to have the loop "write to disk" write several items in the queue at the same time. I hope that I can write simultaneously enough items that I can use my bandwidth 60MO together writing and speed up execution of any sub routines that depend on data written to disk.

  I know there is probably best architecture for this application, but for the moment, I am limited to this architecture. If you have any suggestions for other architectures, I'm more willing to listen to, but coming back I am looking for a way to improvise simultaneous tail reads and then write them to disk with my current structure.

  Thank you all, thank you for the help.
  Taylor S. Amarel
  Learning is alive.

  You can put your element Dequeue function in a loop For and set N to a number so that you get several items from the queue at a given time.  Turn on indexing and you will have a table of data.  Write the table in its entirety on the disc.  This should speed things up a bit.  Don't forget to use shift registers for the sons of the error and the reference to the queue in the loop For and also put a little delay in the loop to stop 100 percent CPU usage.