Buffer could replace the queue in the design of producer/consumer model

Similar Questions

• Should I use the design of producer/consumer model (Instead of Globals)?

  Hello everyone.

  I have a request including several loops in it. A loop reading data series and he analyses for use in the other loops, another loop acquires via DAQmx data and performs calculations on it for use in other loops, the other formats the data from two loops and poster and one last test data. I was wondering if this is a good candidate for the design of producer/consumer model.

  For now, I use global variables to send data from the series and DAQmx loops to other loops. I use motors of the action for the different parts of the program that should be used everywhere, as the serial port. The test loop needs than the most recent data to run his test.

  Thanks for your suggestions!

  The short answer is Yes. If nothing else using queues to pass data will allow your various loops inactive if no data is present. By using globals your curls must continuously survey to see if the data has changed. You always are beter off if you can make your request, driven by events rather than to use the polling stations.

• Data types in the design for the producer consumer model

  Is it possible for me to use any type of data in a model of design producer consumer, without specifying specific data type?

  what I mean is if there is a way to connect to a data type with which I can use any other type of data, not to mention that one that I have connected, and if not, how can I specify the data type for a number or any other data type, for use in a design of producer-consumer model?

  You can make a part of your cluster of data a Variant.  It will take any type of data.  A common architecture for the producer/consumer is a cluster which is an enum and a Variant.  The enum contains all possible "orders", you might want to send.  The variant contains data that could be of any type.

  Ungroup you in the consumer and get the enum and Variant.  Attach the enum to a case structure.  In the specific case, convert the variant type in a data type of regular LabVIEW and with it as you please.

• How to replace the mouse to produce a demonstration for a computer touchscreen or tablet...

  Hello!

  To replace the mouse with a pointing finger, a helping hand, how could I do?

  The normal size of a cursor is too small. I would like to insert a Big finger - to be reallistic...

  Do you have a solution?

  Thank you very much

  Nicoolfly

  Thank you!

  I did a test with a png - 200 x 200 pixel image - I changed the extension: .cur instead of .png, and... it works!

  Captivate recognizes my cursor file! And I have a big hand to simulate on the demonstration of touchscreen!

• What is the fastest method producer consumer. Queue, RT-FIFO, event

  Hi all

  Another question completed for the pro:

  I recently inherited the labview code that uses RT-FIFO for the transfer mechanism in the architecture of the producer consumer.

  The code was first written in 3-4 years and is currently in LV8.6. It is possible that the reasons for the architectural decision no longer exists.

  I am qualified using a producer consumer queued architecture,

  I understand the RT-FIFO Architecture.

  I started using an architecture based on events from the user.

  (I have attached samples of each)

  I also see the existence of a priority queue

  Each method has its own capabilities and gaps, that hand, nobody knows the relative performance of each method.

  (Assuming that the only process)

  I would expect RT-FIFO to be faster, there seems to be a version of low characteristic of a standard queue.

  What is the perfornace hit to use a coding user-friendly queue more

  RT-FIFO description talks about commications between the time-critical and lower priority threads.

  Until today, I thought that the queues had the same capacity.

  

  I've included an event method that I commonly use for review by peers and help from other users...

  It allows to:

  1. several producers with different types of data

  2. process 37 production order.

  3 allows asynchronous verification of functional notifiers such as stop, start and abort.

  4. in a system not real-time, it can include interactions of façade.

  What I do not understand on this subject, that's what are overhead or thread priority changes that may occur using this architecture (it solves a lot of problems for me).

  Thanks in advance,

  Hi Timmar,

  Here's a KB article on some frequently asked questions about the RT FIFO: http://digital.ni.com/public.nsf/allkb/7AE7075AF1B2C58486256AED006A029F?OpenDocument

  The more relevant question is #4, I posted below.

  What is the difference between RT FIFO and queues? 
  Functionally, RT FIFO and LabVIEW queues are two pads of first in, first out. However, here are the main differences between them:

  • RT FIFOs run deterministically in LabVIEW and evanescent code queues are not. This comes from the fact that queues use block calls during read/write to the resource shared, while RT FIFOs use non-blocking calls.
  • RT FIFO are fixed size while queues develop when items are added to them.
  • RT FIFOs will execute the code, even if there are input errors. They can (and will) produce new errors and spread the existing errors.
  • Queues work with any type of data, while the data types that can be used with RT FIFOs are limited. Generally any type of data involving allocations of extra memory can be used with RT FIFOs to preserve determinism.

  Let us know if you have persistent questions!

  Ryan

• In a wreath of two screens Thunderbolt, I could replace the first display with a (for example) 2012 iMac and use target Display Mode to power the two?

  My Thunderbolt screens have the possibility to be connected in Garland and get their signal on a single cable Thunderbolt, an iMac in target Display Mode should not also have this capability? Is an iMac in target Display Mode capable of simulating a Thunderbolt Display not only to get a video for himself but also for a Thunderbolt Display is connected?

  I've heard tell that some people used their iMac screen target with the target Display Mode while the iMac has been connected to another monitor (not a Thunderbolt Display).

  The result was that internal display of the iMac switched on the target Display Mode, but doesn't have the monitor connected.

  I haven't found someone who has tried this and published his experience with a Thunderbolt Display connected to the iMac.

  Unfortunately, a little more research would have responded and answered my question.

  Yes, I can replace one of the Thunderbolt screens in the chain with an iMac. Replaced screen should be one that is not directly connected to the mac of the source.

• ? Replaces the missing effect of a model? CS6

  Hi all

  For some time I have been using AE... I wanted to use a model that hive, I downloaded and it asks me to replace an effect. How can I do this please?

  Thank you for any step by steps, again, it has been a few months since I was in version AE CS6

  

  Optical flares is a third-party plugin commercial. You have to buy.

  Mylenium

• Update the controls on the front panel producer consumer

  Hello

  I wanted to ask you a few tips.

  Usually, when I implemented a consumer producer I use producer to create items from queue whose state of the enum and pack all the necessary data in the process of the event in a Variant.

  Then the consumer does all the work.

  There are two areas where I feel that I could not be using the best approaches...

  (1) when I need to update a control on front panel I Pack a reference to this control on front panel in the variant in order to access the property nodes in the consumer and to update.

  I have attached photos with an example. It's simplified code where the user must perform a task of data acquisition in the analysis of certain parameters. The code increases the setting of a fixed amount to each race to help the user in its sweep.

  Is there a best way to do this?

  (2) when events require the same control to be plugged into the variant for the handling of the loop of consumer I create local variables or references to this control to other events. Would it be better to have a registry change that crosses the loop producer which gets updated values of façade at each time the loop iteration?

  Thank you.

  Because you use a loop of events such as the producer, I would use user events to update your controls.  This way you are not circulate references just to set/update a control.  You can make a user event and handle this event with the structure of your event.  Your client sends just the event with all the necessary data.  I found this configuration really useful since it retains all the GUI code centralized in a single loop.

• Replace the chip AMD A8 with an AMD A10

  HI, I was wondering if anyone had any suggestions on this.  I have a HP: 500-054 with an AMD A8 chip, I want to upgrade an A10.  Power and watts on socket are very good A10 uses the same power and is located in the path of upgrade for the Council of Eric on the 054.

  My problem is that it looks like the factory used a thermal GLUE, instead of a paste.  When I opened the hood and went to remove the fan screws were already in bulk.  Unscrew more just to be sure and tried to remove the fan so I could replace the chip. I checked and recheck and nothing else is holds the fan.

  So any suggestions on getting the fan assemble the CPU socket without damaging the motherboard?  He is stuck in solid and hoped that someone here would have a suggestion.

  I'm not particularly intelligent or gifted. I'm just very, very curious.
  Albert Einstein

  Thanks for the reply, I was upgrade the system to pull the max memory and put it into the higher A-series chip. A problem with the fan by pulling even after be unscrewed it wasn't pulling up if I could have access to the chip.

  Regardless of the factory used as a thermal paste should be defined as super glue.  Shouldn't not concerned by the old A8 chip I replaced it anyway, so I unplugged the fan and run the PC for 15 minutes on a game with the unscrewed and disconnected fan.  Not something that I would normally do, but this has worked to build-up of heat allowed me to wiggle the fan a little and she appeared off the coast.

  Thanks for your reply, the problem is resolved and the new chip Assembly and fan of the A10 is installed and works very well.  Note the A8 chip works well so I tested it on another PC so overheating does no damage.

• HP Pavilion Slimline s5-1204: replace the front serial bus

  OK, so all first off I am new to the fourms to HP. Suffice to say. But 2 days ago or so I got up from my office to watch TV and I was still wearing my helmet and they were always connected. So when I got up I almost tore the helmet on the plug and now the front plug on the usb hub is heavily damaged. I was wondering if there was a way I could replace the front serial bus.

  Try here get spare parts:

  http://support.HP.com/us-en/document/c00372736

• Re: Satellite P200-178 - how to replace the HARD drive?

  Is it really possible to replace the HARD drive on this model? I have another satellite & which was 2 screws & pulling on one leg, job done.

  The P200 has an opening apparently get actually on the HARD drive but it gets you on the underside of the car, so I think that you will have to pass the upper part by means of the keyboard.

  Can anyone help? I lost 70 pounds on a HARD disk that cannot be mounted?

  Thanks in advance

  Hello

  As far as I know on all models, it of possible to swap the HARD drive.

  According to the user manual on the underside of the laptop it is a case of HDD for HDD1 and HDD2. This coverage is provided by one or two screws, I think that should be deleted. After that, you are able to exchange the HARD drive.

  Take a look on the underside. HARD drive swap is not complicated and can be done in a few minutes. :)

• How to replace the hard drive with an SSD on a model of end 2011 MacBook Pro 15 inch, A1286

  Hello

  I would like to replace the hard drive on my model of end 2011 MacBook Pro 15 inch, A1286 with a disk solid state drive (SSD). First of all, I would like to know if this is possible. Second, what is the best way to do it? I'm under the Yosemite OS if that makes a difference.

  Here are some technical details of my current system:

  -MacBook Pro 15 inch, late 2011 model A1286

  -OS yosemite

  -16 GB of memory/RAM

  -Currently using stock HD

  All instructions step by step would be helpful with what software should I use to make backups of my current operating system (e.g., SuperDuper). I would also like to know what tools or material I need like type of screwdriver, cables to transfer data to the SSD, etc.. My goal is to not have to reinstall each app one by one on the SSD, but if that's the only way to do it then it's okay.

  Thanks in advance for any help.

  You can see instructions OWC here. Tools are mentioned in the discussion (I used a plastic knife picnic with the stronger edge somewhat blunt for nylon pry tool). I suggest you invest in one of these external fences. Install the SSD in who and clone internally externally with CarbonCopyCloner or SuperDuper. Then move the external drive of the internal drive after the start of the SSD in the external to confirm the operation.

• Programmatically change the number of producers in an architecture of producer/consumer

  Hi all

  I've got 3 momo SoMat I am streaming of data to 10 Hz. I plan on 3 producer loops and loop a consumer to treat.

  I am pretty sure when I show my customer that they want to increase the number of devices. This scuppers then the producer/consumer model unless I change by programming the number of producers and the rest of the architecture associated.

  Is there a way to do this or a better architecture?

  Phil

  As long as there is an ID any in your command of the queue, I do not see why your consumer cannot handle the producers as much as you need.  I would turn the producer code in a Subvi.  Make sure reentrant Subvi.  Then, you can call dynamically that VI as many times as you need, one for each instrument.

• Instead of using the structure of the event with the producer consumer?

  I used the architecture of producer-consumer in the past to control a state machine with the structures of the event.  I'm working now with the basic version of LV that does not include the structure of the event.  Can anyone recommend alternatives to the use of the same architecture in this case?  Thank you, David

  Before the introduction of the structure of the event, the only option was the election.  Control terminals are in a time loop (the producer) with shift registers and a wait, usually about 100ms.  At each iteration of the loop, the control's current value is compared to the previous value.  If it has changed, and then take appropriate action.  Andrey suggested, queues are a good way to pass information between the loops.

  It works for the equivalent of the value change events.  Things like mouse to top or filter events were much more difficult or not possible.

  Lynn

• Using the producer/consumer with GPIB/VISA model

  Hi all

  So I have a .VI I learned to communicate with my camera, I joined. I tried strip down as much as possible, just to understand the concept. It basically just takes a resource VISA name, use this open VISA, then uses the same resource VISA to write a command that reads the data from my machine (xall?) and then bed in 500 bytes and which prints. If it works, and it's good.

  I try to use producer/consumer model for doing essentially exactly what this guy. I have a RLC, I want to press a button that starts my measure, I want him to taste several times per second, save the data in a text file or .csv and then stop when I press the stop button. Thus, he will be given indefinitely potentially.

  I would like to have the data in a format something like:

  Time C R

  0 5.0 4.3

  ... etc.

  I read the link of model p/c above, but my LabView knowledge is still low. Currently, my plan is to take the part of read/write of my attached VI, which are a sub - VI and then put that in the pink box in the VI for the producer/consumer above page that is labeled "produce data to be placed in the queue":

  

  What prevents me to do this, it's that I can't get the piece of read/write to work properly as a standalone Subvi.

  What is the right way to go about this?

  Thank you!

  I put if you actually found data of your instrument.  Your instrument is not made to take new measures or just send you the last reading, she did.

  Insofar as the file IO, I recommend that you learn to use the palette for the file IO functions.  You need to create your file before your loop, write in a text file inside and then close after the loop.  I don't do the thing the comment on the express VI entry will do what you want.