In summary execution time

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• How to shorten the execution time of the NXT (TETRIX & MATRIX toolkit) brick

  Hello

  How to shorten the execution time of the NXT brick?

  (TETRIX & MATRIX toolkit, running time)

  The software is 2012 LabVIEW for LEGO MINDSTORMS

  Thank you.

  

  

  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.

  (3) If you need to speed up execution other than that, as a user advanced LabVIEW, you can create a copy of the VI of engines to move and change it as you choose. All you have to to the "DC motors' entry is use cluster to array on the cluster, as shown below. I think you can speed it up by running all the settings before the loop (type sensor and fixed connection configuration), and removing the value of power if you send only the values between-100 and 100.

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

  

• How to calculate the execution time of a SCTL in FPGA VI?

  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.

• 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/

  Edit: If you're open to suggestions:

  -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 calculate the execution time of a loop?

  Hello

  Can someone guide me that how to calculate the execution time of a loop to iterate?

  Thank you and best regards,

  Rashid

  I hope I have your question! See attached screenshot

• too low execution time

  I tried to measure the execution time. The rate is 1KS/s through to read 100 per channel in a loop of 10 and samples. The time should be about 1000 ms, but it is only 500-600 ms. And when I changed the rate/number of samples, the run time does not change... How could it happen?

  Well,.

  The task inside the loop compensation is something of a problem.  (The error handler must jump on the second iteration)

• 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

• Execution time of the XML CVI functions increase when loop

  I wrote several functions with CVI who read XML files. I confirmed in the utility of monitoring resources I have cleaned all my lists, items, documents, etc. I found that when I loop one of the functions I created, the execution time increases. The increase is small, but it is sensitive and does not affect the performance of my.

  Are there other sources of memory I need to release? It seems that there is a leak memory somewhere, but I can't see where this increase.

  I am running LabWIndows/CVI 2009 on Windows 2008 Server. I closed my functions using TestStand 4.2.1. Any help would be appreciated!

  Thanks in advance,

  Kyle

  Hi Daniel,.

  After some playing around, it turns out that the source of my problem was due to running my program as a Debug version, rather than a Release. As soon as I build in a configuration of output, the function remains coherent and quick time loop.

  Thank you for the research on this problem for me.

  Kyle

• SQL execution time

  Hello

  I was wondering if anyone could advise on the best way to capture the following in an 11g database.

  Say that we have;

  -a piece of SQL execution by up to 50 times per minute.

  -unique execution times vary.

  Aside from dba_hist_sqlstat and generate a sort of average over a period of 30 min.

  What would be the best way to get the execution time of this piece of SQL in real-time.

  say I want the individual execution time of this last of 100 executions.

  Any help would be appreciated

  Thank you

  Draw the session (with events of waiting if you want) that executes SQL and tkprof the trc file.

  ORACLE-BASE - Oracle Trace and TKPROF

  Oracle related things: basic SQL statement diagnostic performance - HOW TO, step-by-step instructions

• Oracle NoSQL YCSB - continuous increase in execution time

  Greetings,

  I'm testing with YCSB nosql databases. I'm new to this type of databases, but I already tried few of them. I use the VM with 2 GB of RAM and hosted on Win 7. Although it is not recommended, because I work in the environment of capacity now, I use KVlite. But my problem is confusing and I can not find the reason. So, I have successfully loaded data and tested NoSQL Oracle using different workloads. However, each time, I get the higher execution time. For example, if 1 performance I get 20 seconds, if I stopped database and next day run even workload once again, I get 35 second run time and so on.

  Do you have an idea of what may be the cause of that? As I said, I did research on some nosql databases, but I've never had that strange results.

  Kind regards.

  I can't say with certainty why you see the results you have described, probably is just that with every race on the same data store, more data is getting integrated into the KVlite.

  It is not a good idea to use KVlite for a test YCSB.

  KVlite links to your application instance and does not provide the kind of partitioning of a key space that is normally essential to YCSB workload.

  The idea of YCSB is to provide a random workload on a large number of keys and then to make things as expand data store while the operations are happening and see the impact.

  These kinds of operations on random data access workloads cannot be expected to scale on a single data store instance that distributes keys.

  I suggest that you use an appropriate version of kvstore to run these tests.

  Hope this helps,

  -Robert

• Calculation actual and average execution time

  Hi guru,.

  I have a scenario where I connect my moment of execution in a Table, and my batch

  
  

  Batch_id Scenario_Name

  1 Scen1

  1 Scen2

  1 Scen3

  2 Scen1

  2 Scen2

  2 Scen3

  3 Scen1

  3 Scen2

  3 Scen3

  Now my question is I want to calculate the duration of actual execution and the execution time of the Avg, while Avg running time calculation, I current Batch_ID to exclusion of

  Select scenario_name, count (scenario_name).

  sum (MOD (FLOOR ((END_DATE-START_DATE) * 24 * 60 * 60), 60)) Total.

  sum (MOD (FLOOR ((date_fin-START_DATE) * 24 * 60 * 60), 60)) count (scenario_name) Avg

  of Execution_Log

  -where batch_id = 1

  Scenario_name group

  This query will give me the result, but it's also including current Batch_Id

  OK, try this query. I dropped the group by clause as the avg is the only present aggregation, and who is now handled through the analytical counterpart (with more partition by clause).

  SELECT

  A.BATCH_ID,

  A.SCENARIO_NO,

  A.SCENARIO_NAME,

  C.TGT_TABLE_NAME,

  A.START_DATE,

  A.END_DATE,

  A.EXECUTION_STATUS,

  Decode(A.EXECUTION_STATUS,'COMPLETED','No Error','FAILED',A.ERROR_MESSAGE,null) ERROR_MESSAGE

  MOD (G ((A.END_DATE-A.)) START_DATE) * 24 * 60 * 60), 60) TEMPS_REEL.

  AVG (MOD (FLOOR ((A.END_DATE-A.START_DATE) * 24 * 60 * 60), 60)) on (A.scenario_name partition) AVG_TIME

  To exec_log1 A

  INNER JOIN exec_log2 B

  ON A.BATCH_ID = B.BATCH_ID

  AND A.BATCH_ID = 2

  INNER exec_log3 C

  ON A.SCENARIO_NO = C.SCENARIO_NO

  AND A.SCENARIO_NAME = C.SCENARIO_NAME

  ORDER BY A.SCENARIO_NAME ASC

  I hope this helps.

• Query execution time

  Hello

  Maybe a stupid question, but I would like to know if it is possible to calculate the execution time of a query.

  I know ' set timing on ', but I can't use it, because I don't have any environment for the needs of the school project.

  I have to select all the orders for a line in a table with more than 1,000,000 records (easy ^^) and there are 100 users simultaneously connected.

  How long is the execution time and the impact of 100 users (Oracle 11 g)?

  Of course, it also depends on the server, the table index, etc., but this should be ignored.

  Maybe somebody has a tip or a white paper?

  Thank you

  It depends on the code that you are proposing.

  If you are using bind variables and/or analyze only once, your application is scalable and the number of users is not serious.

  As part of the memory is to be locked during analysis, analysis each time or do not use do not bind variable, your application allows serialize access to the database, and the amount of resources will be directly dependent on the number of users. In doing so, your app is impassable.

  The number of users will now be certainly serious.

  ----------

  Sybrand Bakker

  Senior Oracle DBA

• Help please - issue of calculation of execution time

  Hello
  
  Version of DB: database Oracle 11 g Enterprise Edition Release 11.2.0.3.0
  Previous thread (RE: help please - issue of calculation of execution time) mode lock, therefore open new thread.
  
  Karthick_Arp thanks for your great help with the merge code.
  
  I modified my code with Merge statement instead of loops and internal loops.
  
  PFB code and output. But still I am negitive values over time of execution because end_time < start_time is coming. Please suggest me how to solve this problem.
  
  1 CREATE OR REPLACE PROCEDURE my_proc
  2 EAST
  3 sql_string VARCHAR2 (4000);
  4 v_start_time TIMESTAMP;
  5 v_end_time TIMESTAMP;
  6 v_rowcnt NUMBER;
  7. START
  8 FOR c1 IN (SELECT ROWNUM tab_no, tablename, TYPE
  9 FROM stored_ddl_policies by tablename) / * mourning tablename order * /.
  10 LOOP
  11 sql_string: = q']
  12 merge into #tablename # b
  13 using (select empkey, id, dt
  14de emp_base) on (a.empkey = b.empkey)
  15when matched then update set b.id = a.id, b.dt = a.dt] ";
  16 sql_string: = REPLACE (sql_string, "#tablename #", c1.tablename);
  17 v_start_time: = SYSTIMESTAMP;
  18
  19 sql_string EXECUTE IMMEDIATE.
  20
  21 v_end_time: = SYSTIMESTAMP;
  22 v_rowcnt: = SQL % ROWCOUNT;
  23 DBMS_OUTPUT.put_line (c1.tablename); / * added for display * /.
  24 DBMS_OUTPUT.put_line (v_start_time);
  25 DBMS_OUTPUT.put_line (v_end_time);
  26 INSERT INTO exec_time (TABLE_NAME, START_TIME, END_TIME, EXCUTION_TIME, NO_OF_RECORDS_PROCESSED)
  27 VALUES (c1.tab_no |) ' ' || C1. TableName, v_start_time, v_end_time, v_end_time - v_start_time, v_rowcnt);
  28 END LOOP;
  29
  30 COMMIT;
  31EXCEPTION
  32 THEN THAN OTHERS
  33 THEN
  34 DBMS_OUTPUT.put_line (SQLERRM);
  35END;
  16 m
  
  OUTPUT:
  

  select * from exec_time by start_time desc

  TABLE_NAME START_TIME, END_TIME EXCUTION_TIME NO_OF_RECORDS_PROCESSED
  
  6 TAB6 31/05/2013 3:07:00.282065 AM 31/05/2013 3:06:47.103731 AM - 00 33 00:00:13.178334
  23 TAB23 31/05/2013 3:06:56.159271 AM 31/05/2013 3:06:56.342313 AM + 00 00:00:00.183042 1013
  20 TAB20 31/05/2013 3:06:47.104115 AM 31/05/2013 AM + 00 00:00:09.054770 158169 3:06:56.158885
  13 TAB13 31/05/2013 3:06:41.668578 AM 31/05/2013 3:06:31.690199 AM - 00 28 00:00:09.978379
  7 TAB7 31/05/2013 3:06:41.624134 AM 31/05/2013 3:06:41.668468 AM + 00 00:00:00.044334 0
  12 TAB12 31/05/2013 3:06:31.690582 AM 31/05/2013 3:07:00.281522 AM + 00 00:00:28.590940 240715
  3 TAB 3 31/05/2013 3:06:24.669461 AM 31/05/2013 3:06:41.623421 AM + 00 00:00:16.953960 47426
  2 TAB2 31/05/2013 3:06:24.182326 AM 31/05/2013 AM + 00 00:00:00.486723 5242 3:06:24.669049
  8 RAB8 31/05/2013 3:06:21.416823 AM 31/05/2013 3:06:24.181956 AM + 00 00:00:02.765133 28636
  1 TAB1 31/05/2013 3:06:16.320679 AM 31/05/2013 AM + 00 00:00:05.095731 132633 3:06:21.416410
  16 TAB16 31/05/2013 3:06:07.446056 AM 31/05/2013 AM + 00 00:00:08.874227 421215 3:06:16.320283
  11 TAB11 31/05/2013 3:06:07.442987 AM 31/05/2013 3:05:55.361263 AM - 00:00:12.081724-00 60273
  19 TAB19 31/05/2013 3:06:03.683463 AM 31/05/2013 3:06:07.445630 AM + 00 00:00:03.762167 77549
  15 TAB15 31/05/2013 3:06:00.291696 AM 31/05/2013 3:06:03.683017 AM + 00 00:00:03.391321 77117
  10 TAB10 31/05/2013 3:05:57.787733 AM 31/05/2013 AM + 00 00:00:09.654601 517960 3:06:07.442334
  18 TAB18 31/05/2013 3:05:56.742873 AM 31/05/2013 3:06:00.291274 AM + 00 00:00:03.548401 105630
  24 TAB24 31/05/2013 3:05:55.361707 AM 31/05/2013 3:05:56.742506 AM + 00 00:00:01.380799 15115
  4 TAB4 31/05/2013 3:05:18.873303 AM 31/05/2013 3:05:06.966972 AM - 00:00:11.906331-00 49078
  21 TAB21 31/05/2013 3:05:13.609759 AM 31/05/2013 3:05:18.872878 AM + 00 00:00:05.263119 56525
  22 TAB22 31/05/2013 3:05:09.070048 AM 31/05/2013 AM + 00 00:00:48.717139 451439 3:05:57.787187
  5 TAB5 31/05/2013 3:05:06.967411 AM 31/05/2013 3:05:09.069642 AM + 00 00:00:02.102231 773
  25 TAB25 31/05/2013 3:05:05.198282 AM 31/05/2013 AM + 00 00:00:08.410911 308670 3:05:13.609193
  14 TAB14 31/05/2013 3:04:59.575951 AM 31/05/2013 3:05:05.197701 AM + 00 00:00:05.621750 12118
  17 TAB17 31/05/2013 3:04:43.740910 AM 31/05/2013 3:04:59.575503 AM + 00 00:00:15.834593 529
  9 TAB9 31/05/2013 3:04:38.286041 AM 31/05/2013 3:04:59.011404 AM + 00 00:00:20.725363 65921
  
  Thanks in advance.
  
  Published by: 1008545 on May 31, 2013 01:40
  

• How to get the query execution time without running...?

  Hello
  
  I had one condition... as follows...
  I had 3 sql statements. I need to run only sql what runtime is very less.
  
  Can someone help me, how to get the time query and run this query without using explain plan... ?
  
  Thank you
  Rajesh

  I can't think in any way at all to get the query execution time without running the query.

  You might get an estimate ( approximation ) If you are using explain plan.

  But you have governed to explain plan for a reason, so I can't help you.
  Why you do not want to use don't explain plan?

• Business rule execution time to evolution

  Hello
  I'm working on EPMA 11.1.1.3 when I run BR on dataform after that while the dataform will open in a new window.when, I'm looking in the newspapers, it shows that
  BR, launching execution time exceeded now BR is running in the background.
  gurus can you tell me where I can change the runtime by default BR...
  -------
  Thanks in advance
  
  Published by: kailash Sep 14, 2011 16:15

  Have a read of - http://download.oracle.com/docs/cd/E12825_01/epm.111/hp_admin/ch02s07s06.html

  See you soon

  John
  http://John-Goodwin.blogspot.com/