Solved

Thread scheduling

Posted on 2004-10-08
12
231 Views
Last Modified: 2008-03-06
how can i control execution of multiple threads in a sequence?
  thread1 > thread2 > thread3 > thread1 ......

  i thought about writing a schedular but when i wrote it i had problems about switching because the threads scheduled can also have their own sleep or wait conditions.

  is there any robust solution for this kind of things?
0
Comment
Question by:sunny012097
  • 4
  • 3
  • 2
  • +3
12 Comments
 
LVL 5

Accepted Solution

by:
Naeemg earned 500 total points
ID: 12256612
0
 
LVL 92

Expert Comment

by:objects
ID: 12256617
if u want them to run consecutely then why run them in seperate threads, just call them consecutively from the one thread.

if they are seperate threads, then either don't start the next thread until the previous is finished, or call join() on the previous at the start of each thread to wait until it completes.
0
 
LVL 5

Expert Comment

by:Naeemg
ID: 12256619
0
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 15

Expert Comment

by:babuno5
ID: 12256942
Hello
well u can try setting the priority of each thread which might just help you out

Thread.setPriority(int );
Thread.MIN_PRIORITY;
Thread.NORM_PRIORITY;
Thread.MAX_PRIORITY;

or u could also try synchronizing the threads.
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12258301
Don't fumble with priorities! Follow objects' advise thats the perfect answer!

;JOOP!
0
 
LVL 2

Expert Comment

by:ThummalaRaghuveer
ID: 12261895
Some thing funny...

Have an instance of a class(WhoNext) which here contains a whoNext boolean array....
If Thread 1 is using then make WhoNext.whoNext[1] = 1(my turn) and rest all to 0.

If Thread 1 is done and Thread 2 should be executed..... say
WhoNext.whoNext[1] = 0(Not My turn)
WhoNext.whoNext[2] = 1(My Turn)

Say For Example Thread 1 is supposed to run but do not get CPU time then as its not other turn to run their job they should just say
Thread.yield();

:-)
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12265314
No, just call:

      thread1.run();
      thread2.run();
.....
;JOOP!
0
 
LVL 2

Expert Comment

by:ThummalaRaghuveer
ID: 12266653
Then you are not using the concept of Threads all you are doing is making some function calls.....

which would be executing sequentially........
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12266857
That's exactly right: threads in a sequence ARE NOT THREADS ANYMORE!

;JOOP!
0
 

Author Comment

by:sunny012097
ID: 12267088
i am talking about squentially runing threads like;

              thread 1
              thread 2
              thread 3
              thread 1
              thread 2
              ...
0
 
LVL 24

Expert Comment

by:sciuriware
ID: 12267108
Threads are subprocesses that run concurrently.
If you want it like you describe, you don't need a single thread, unless you want to run them
concurrently to your main.
Then you only need ONE thread that calls these 3 procedures in sequence.
;JOOP!
0
 
LVL 2

Expert Comment

by:ThummalaRaghuveer
ID: 12267461
yaaa JOOP you were right
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question