In PVM, why PvmTaskDefault behave different than 0?












0















In a very simple C program, I configured 2 machines:





  • Machine A: Which acts as Master and Slave


  • Machine B: Which acts as Slave only


I am trying to make them both work as slaves as you can see, but I found a problem in the following line...



pvm_spawn("slaveTask", (char**)0, PvmTaskDefault, "", 2, tid);

//                                ^ notice this


If I place the line like that, only the Machine B works as intended, but the Machine A for some reason do not want to work as slave.



BUT, if I change that line with the following...



pvm_spawn("slaveTask", (char**)0, 0, "", 2, tid);

//                                ^ notice this


Then both Machines A and B work as slaves, and A also as master.



I checked in websites like this and this that state that both are the same, when they are clearly not.



Could I have some explanation?



Thanks in advance.






c pvm







share|improve this question



























    0















    In a very simple C program, I configured 2 machines:





    • Machine A: Which acts as Master and Slave


    • Machine B: Which acts as Slave only


    I am trying to make them both work as slaves as you can see, but I found a problem in the following line...



    pvm_spawn("slaveTask", (char**)0, PvmTaskDefault, "", 2, tid);
    
//                                ^ notice this


    If I place the line like that, only the Machine B works as intended, but the Machine A for some reason do not want to work as slave.



    BUT, if I change that line with the following...



    pvm_spawn("slaveTask", (char**)0, 0, "", 2, tid);
    
//                                ^ notice this


    Then both Machines A and B work as slaves, and A also as master.



    I checked in websites like this and this that state that both are the same, when they are clearly not.



    Could I have some explanation?



    Thanks in advance.






    c pvm







    share|improve this question

























      0












      0








      0








      In a very simple C program, I configured 2 machines:





      • Machine A: Which acts as Master and Slave


      • Machine B: Which acts as Slave only


      I am trying to make them both work as slaves as you can see, but I found a problem in the following line...



      pvm_spawn("slaveTask", (char**)0, PvmTaskDefault, "", 2, tid);
      
//                                ^ notice this


      If I place the line like that, only the Machine B works as intended, but the Machine A for some reason do not want to work as slave.



      BUT, if I change that line with the following...



      pvm_spawn("slaveTask", (char**)0, 0, "", 2, tid);
      
//                                ^ notice this


      Then both Machines A and B work as slaves, and A also as master.



      I checked in websites like this and this that state that both are the same, when they are clearly not.



      Could I have some explanation?



      Thanks in advance.






      c pvm







      share|improve this question














      In a very simple C program, I configured 2 machines:





      • Machine A: Which acts as Master and Slave


      • Machine B: Which acts as Slave only


      I am trying to make them both work as slaves as you can see, but I found a problem in the following line...



      pvm_spawn("slaveTask", (char**)0, PvmTaskDefault, "", 2, tid);
      
//                                ^ notice this


      If I place the line like that, only the Machine B works as intended, but the Machine A for some reason do not want to work as slave.



      BUT, if I change that line with the following...



      pvm_spawn("slaveTask", (char**)0, 0, "", 2, tid);
      
//                                ^ notice this


      Then both Machines A and B work as slaves, and A also as master.



      I checked in websites like this and this that state that both are the same, when they are clearly not.



      Could I have some explanation?



      Thanks in advance.






      c pvm




      c pvm






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 16 '18 at 22:57









      David Tabernero M.David Tabernero M.

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