How to calculate the execution time of a loop?

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  Hello

  Can someone guide me that how to calculate the execution time of a SCTL for an iteration in the FPGA VI?

  Thank you and best regards,

  Rashid

  Hello r,.

  A SCTL will always run in a beat the clock it has been linked to.  So, if you use a 40 MHz clock, this loop will run in 25 ns.  If the code cannot complete in that, or if it requires two graduations of the watch to do the calculation, your code does not compile, then you have the guarantee that this will always be how long it takes this piece of code to run.

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  How to shorten the execution time of the NXT brick?

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  Hi 40123157,

  You use the module in an appropriate manner, and there is no simple way to improve the time of loop iteration beyond what you've done. Here are my suggestions:

  (1) the i2c commands take a long time. In your application, it may speed up if you run only move the engine only when the engine speed has changed.

  (2) for this particular example, you do not use the release of the report engine. If this VI does not need to run it can be removed.

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  (4) drawing on the screen can be slow you down here.

  

• How to measure the execution time of a specific to a VI process?

  Hello! My VI has two processes: compression and edge detection image and I'm trying to measure the execution time for the process of detection of edge of my VI, but I don't know how to do. Please give me some ideas on how to do it. Thank you!

  There are several ways that you can do.

  -L' one is using the number of cycles before and after your vi to get time like here: http://digital.ni.com/public.nsf/allkb/6F6B9F4E149C80578625652800784764

  - or use the profiling: https://zone.ni.com/reference/en-XX/help/371361H-01/lvhowto/profiling_vis/

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  -You have not to load the image inside the loop instead, make him outside of the loop.

  - And I see of many IMAQ buffers are not removed properly. You can have everything at once by Images (No) by logging in to Boolean TRUE: http://zone.ni.com/reference/en-XX/help/370281P-01/imaqvision/imaq_dispose/

• How to know the execution time

  Hello
  
  I'm using Oracle 11 g. I want to know the execution time of a query.
  
  Can someone help me please how to find it.
  
  And. y at - it a tool that compares the performance of the 2 queries?

  user13044793 wrote:
  Hello

  I'm using Oracle 11 g. I want to know the execution time of a query.

  Can someone help me please how to find it.

  In SQL * more:

  SET TIMING ON

  And. y at - it a tool that compares the performance of the 2 queries?

  In SQL * more:

  SET AUTOTRACE ON

  URS

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  Select * view where usr_id = "abcd";
  
  
  If the result is 300 lines it scrolls up until all the rows are retrieved and finally gives me the run time in 40 seconds, or 1 minute... (it is after all records scrolls)
  
  but when I run it in Toad he gives 350 milli seconds...
  
  I want to see the execution time in sql how to proceed
  
  client and database server 11g is g 10
  
  concerning
  REDA

  In sqlplus you can do set autotrace traces to suppress the display of the selected lines.

  John

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  And how to calculate the cost of time on the loading process? Can it be verified using db_stat?
  
  Thank you very much

  Hello.

  There is a discussion on how proceed (preload the cache) in this thread:
  Re: a question about read file or cache

  Ben Schmeckpeper

• How to calculate the load time, max - min date query

    CREATE TABLE TEST ( GID VARCHAR2(100 BYTE), SGID VARCHAR2(100 BYTE), PID VARCHAR2(100 BYTE), DATES TIMESTAMP (6) );
  
  REM INSERTING into TEST
  SET DEFINE OFF;
  Insert into TEST (GID,SGID,PID,DATES) values ('1','1000','ABC',to_timestamp('24-AUG-13 12.00.00.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('1','1001','BCD',to_timestamp('24-AUG-13 05.21.46.491000000 PM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('1','1002','CDE',to_timestamp('24-AUG-13 12.00.00.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('2','1004','EDF',to_timestamp('23-AUG-13 05.22.20.000000000 PM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('2','1003','FEG',to_timestamp('24-AUG-13 12.00.00.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('2','1001','GHI',to_timestamp('24-AUG-13 12.00.00.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('2','1006','JKL',to_timestamp('24-AUG-13 12.00.00.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
  Insert into TEST (GID,SGID,PID,DATES) values ('3','1007','LMN',to_timestamp('24-AUG-13 12.00.00.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
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  Hello

  I need a sql query which gives me the time taken to load the records ie., Max date less date min. I ran a query that gives me the result "0 23:59:26.491" below.

  select (max(DATES) - min(DATES)) from test;
  

  When I apply the same logic in Peoplesoft enterprise manager, it generates the sub query and throw me the "ORA-01722: invalid number" error.

  select max(TO_CHAR(cast((DATES) as timestamp),'YYYY-MM-DD-HH24.MI.SS.FF'))
  -min(TO_CHAR(cast((DATES) as timestamp),'YYYY-MM-DD-HH24.MI.SS.FF'))
  from test; 
  

  Can you please modify the above query?

  user11872870 wrote:

  1. CREATE TABLE TEST (VARCHAR2(100 BYTE), VARCHAR2(100 BYTE), PID VARCHAR2 (100 BYTE) SGID GID, DATES TIMESTAMP (6));
  2. INSERTION of REM in TEST
  3. TOGETHER TO DEFINE
  4. Insert into TEST (GID, SGID, PID, DATES) values ('1 ', ' 1000', 'ABC', to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  5. Insert into TEST (GID, SGID, PID, DATES) values ('1 ', ' 1001', "BCD", to_timestamp (24 August 13 05.21.46.491000000 PM ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  6. Insert into TEST (GID, SGID, PID, DATES) values ('1 ', ' 1002', "COE", to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  7. Insert into TEST (GID, SGID, PID, DATES) values ('2 ', ' 1004', "EDF", to_timestamp (05.22.20.000000000 PM Aug 23, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  8. Insert into TEST (GID, SGID, PID, DATES) values ('2 ', ' 1003', "FEG", to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  9. Insert into TEST (GID, SGID, PID, DATES) values ('2 ', ' 1001', 'GHI', to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  10. Insert into TEST (GID, SGID, PID, DATES) values ('2 ', ' 1006', 'JKL', to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  11. Insert into TEST (GID, SGID, PID, DATES) values ('3 ', ' 1007', "LMN", to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));
  12. Insert into TEST (GID, SGID, PID, DATES) values ('3 ', ' 1001', "Professions", to_timestamp (12.00.00.000000000 AM Aug 24, 13 ',' DD-MON-RR HH.MI.)) SS. AM FF '));

  Hello

  I need a sql query which gives me the time taken to load the records ie., Max date less date min. I ran a query that gives me the result "0 23:59:26.491" below.

  1. Select (max (DATES) - min (DATES)) of the test;

  When I apply the same logic in Peoplesoft enterprise manager, it generates the sub query and throw me the "ORA-01722: invalid number" error.

  1. Select max (TO_CHAR (cast ((DATES) as timestamp),'YYYY-MM-DD - HH24.MI.)) SS. FF'))
  2. -min (to_char (Cast ((dates) as timestamp),'YYYY-MM-DD - HH24.MI.)) SS. FF'))
  3. of the test;

  Can you please modify the above query?

  1. SELECT max (cast (DATE) as date)-mIN (cast (DATE) as date) test;

• How can I calculate the total time in java?

  Hello!
  
  I need to calculate the total time!
  
  For example I start time:
  Format formatter1;
  Date date1 = new Date();
  formatter1 = new SimpleDateFormat("hh:mm:ss");
  Dim startTime = formatter1.format (date1);
  startTime = "14:20:40.
  
  And I have finishing time:
  Format formatter2;
  Date2 date = new Date();
  formatter2 = new SimpleDateFormat("hh:mm:ss");
  String finishTime = formatter2.format (date2);
  finishTime = '08:30:55;
  
  
  
  Also, having calculated manually, I get the total time: '18:10:15.
  
  How can I calculate the total time in java? (Using formatter1 and formatter2 I guess)
  
  What I need is to print 'total 18:10:15 '.
  
  Thank you!

  800512 wrote:
  I did the following, but I think something's wrong here:

  I've defined before: Date date1 = new Date(); Date2 date = new Date();
  And it should be exactly 5 seconds between them.

  I found the delta between date1 and date2:

  Format formatter = new SimpleDateFormat("HH:mm:ss");
  timeInMilliFromStart long = date1.getTime () - date2.getTime ();
  Date date3 = new Date (timeInMilliFromStart);
  String timeInSecFromStart = formatter.format (date3);

  and I still get
  timeInSecFromStart = 02:00:05

  But it should be exactly 00:00:05.

  What is a problem?

  Because, as I said, a Date to measure a moment in time, not a period. So when you have 5000 ms, and you that transform a Date, this means that 5 seconds after the time, which equals 00:00:05.000 01/01/1970 GMT.

  As I said, if you are not currently in GMT, then you must set the DateFormat GMT TZ. Right now, it's to show you the time in your TZ. If you have included the date in your SimpleDateFormat, you would see the 01/01/1970 or 31/12/1969, function that TZ you find.

  Bottom line: you try to use these classes in a sense they are not intended for, and while you can get the results you want for a limited set of entries if you understand how these classes and how to work with it, it is a fragile approach and comes with all sorts of warnings warning.

• How to calculate the time to SELECT

  I want to know how to calculate the time taken by the SELECT query.
  
  For example: I run a select statement in TOAD (oracle version 9i) who takes 40 seconds to run, but in the output window, it displays few records. It says "list 1 of 500 records, more records exist". This table has total 20 million records.
  
  Now my question is: have you my SELECT query took 40 seconds? or it took 40 seconds to SELECT 500 records.
  
  If it took 40 seconds to SELECT 500 records then how to calculate the total amount?
  
  Any help would be much appreciated.

  To avoid the exit which is probably not really need you can make

  begin
    for c in (select * from xy /*your query */)
    loop
      null;
    end loop;
  end;
  /
  

  This gives an estimate of the time to recover all the lines.

• How to find the last time that the execution of the procedure and by whom?

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  Can be found as the last run and the procedure by which the user in the dictionary of data or something else?

  Thanks in advance.

  At least that audit you, you can probably not.

  If the goal is a particular stored procedure, you can maintain a work table so he can follow the execution time, audit owner etc.

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• To build the waveform.vi function how to calculate the value of dt

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  Please guide me How to calculate the value of dt according to waveform.vi of construction

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  Kind regards

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  It's all simple arithmetic. The inverse of the sampling frequency power of samples is then the dt or the time between samples the number of samples is not relevant.

• Why the execution time increases with a while loop, but not with "run continuously?

  Hi all

  I have a problem of severe weather that I don't know how to fix it because I don't know exactly where it comes from.

  I order two RF switches via a data acquisition card (NI USB-6008). One job at the same time can be selected on each switch. Basically, the VI created for this feature (by a colleague) resets all the outputs of acquisition data and active then those desired. It has three entrances, two chain simp0le controls and a cluster table, that contains the list of all the outputs and some practical information to know what is connected (specific to my application).

  I use this VI in a complex application, and I have some problems with the execution time, which increased whenever I said the VI, so I did a test VI (TimeTesting.vi) to determine where the problem came. In this special VI I record the execution time in a csv file to analyze then with excel.

  After several tries, I found that if I run this criterion VI with the while loop, execution on every cycle time increases, but if I remove the while loop and use the funtionnality "Continuous run", the execution time remains the same. In my high level application, I have while loops and events, and so the runtime increases too.

  I someone could explain to me why execution time increases and how can we avoid this? I have attached my VI test and the necessary subVIs, as well as an image of a graph that shows the execution time with a while loop and «run permanently»

  Thanks a lot for your help!

  Your SetReset_DO VI creates a channel whenever it is called.  And that you never delete a task.

  When running continuously, that it's as if it only runs once and LabVIEW has internal mechanisms to close references that will not be used again.  When a VI is used as a Subvi, LV does not know if she will be called again, and lacks these things until the first level VI stops. You have a memory leak.

  Just as you open and close your file outside the loop for, create your channel out of the loop.

  Lynn

• How to calculate the length of the video format (seconds)

  Hello
  
  I use the ActionScript 3.0 CookBook book and it shows how to calculate the length of a video (and also playing the video in progress) in seconds using the property at the time of the NetStream class.
  
  So, for example, the length of my video is 1070 seconds.
  
  But I want to be able to convert a format such as ' 00 (hours): 00 (mins): 00 (dry) ", '1070 seconds' how can I get this?
  
  Any help is appreciated!
  
  TA :)
  
  Kind regards
  M.

  Hi, thanks for the reply :) you have helped me understand the following code which I just found (and that seemed to work the way I needed it).

  Quote:

  If (_duration > 0 & _stream.time > 0)
  {
  _playbackTime.text = generateTime (_stream.time);
  }

  function generateTime(nCurrentTime:Number):String
  {
  var nMinutes:String = (Math.floor(nCurrentTime / 60)< 10="" "0"="" :="" "")="" +="" math.floor(ncurrenttime="">
  var nSeconds:String = (Math.floor (nCurrentTime % 60)< 10="" "0"="" :="" "")="" +="" math.floor(ncurrenttime="" %="">

  Result set
  var sResult:String = nMinutes + ":" + nSecondes;

  Return value
  return sResultat;
  }

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  Hello
  I use 11.1.0.7 database. Can someone guide me how can I create a resource group resource consumers plan and assign them to my user "dev" so that any query that is run by this user shouldn't take more than 10 minutes for execution and must be abandoned if the execution time exceeds 10 minutes.
  
  Thank you
  
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  BEGIN
  dbms_resource_manager.clear_pending_area();
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      cpu_p5 => NULL, cpu_p6 => NULL, cpu_p7 => NULL, cpu_p8 => NULL,
      parallel_degree_limit_p1 => NULL,
      active_sess_pool_p1 => NULL,
      queueing_p1 => NULL,
      switch_group => 'KILL_SESSION',
      switch_time => 600,
      switch_estimate => false,
      max_est_exec_time => NULL,
      undo_pool => NULL,
      max_idle_time => NULL,
      max_idle_blocker_time => NULL,
      switch_time_in_call => NULL
  );
  dbms_resource_manager.create_plan_directive(
      plan => 'MYTEST_PLAN',
      group_or_subplan => 'OTHER_GROUPS',
      comment => '',
      cpu_p1 => NULL, cpu_p2 => NULL, cpu_p3 => NULL, cpu_p4 => NULL,
      cpu_p5 => NULL, cpu_p6 => NULL, cpu_p7 => NULL, cpu_p8 => NULL,
      parallel_degree_limit_p1 => NULL,
      active_sess_pool_p1 => NULL,
      queueing_p1 => NULL,
      switch_group => NULL,
      switch_time => NULL,
      switch_estimate => false,
      max_est_exec_time => NULL,
      undo_pool => NULL,
      max_idle_time => NULL,
      max_idle_blocker_time => NULL,
      switch_time_in_call => NULL
  );
  dbms_resource_manager.submit_pending_area();
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  BEGIN
  dbms_resource_manager.clear_pending_area();
  dbms_resource_manager.create_pending_area();
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      dbms_resource_manager.oracle_user,
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  );
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  END;