Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

Subject: [OMPI users] SIGSEGV on MPI_Test
From: devendra rai (dev641_at_[hidden])
Date: 2012-01-12 11:05:31

Hello Community: I am running into a strange problem. I get a SIGSEGV when I try to execute MPI_Test: ==21076== Process terminating with default action of signal 11 (SIGSEGV) ==21076==  Bad permissions for mapped region at address 0x43AEE1 ==21076==    at 0x509B957: ompi_request_default_test (req_test.c:68) ==21076==    by 0x50EDEBB: PMPI_Test (ptest.c:59) ==21076==    by 0x44210D: InterProcessorTransmit::StartTransmission() (InterProcessorTransmit.cpp:111) Here is the relevant piece of code:        for ( this->dbIterator = localdb.begin( ) ; this->dbIterator != localdb.end( ); this->dbIterator++)         {             this->TransmissionDetails = (this->dbIterator)->second;             SendComplete = 0;             UniqueIDtoSendto = std::get<0>(this->TransmissionDetails);             RecepientNode = (this->dbIterator)->first;               Isend_request = MPI::COMM_WORLD.Issend(this->transmitbuffer, this->transmissionsize, MPI_BYTE, (this->dbIterator)->first, std::get<0>(this->TransmissionDetails)); /*This is line 111 */MPI_Test(&(this->Isend_request), &(this->SendComplete), &(this->ISend_status));               while(!this->SendComplete)                 {                     /* Test whether the transmission was okay*/                     MPI_Test(&(this->Isend_request), &(this->SendComplete), &(this->ISend_status));                     /**** see if we need to pause or stop ****/                     {                                /* The mutex is released after exiting this block */                                std::unique_lock<std::mutex> pr_dblock(this->mutexforPauseResume);                                while(this->pause==1)                                  {                                    /* pause till resume signal is received */                                    this->WaitingforResume.wait(pr_dblock);                                  }                                if(this->stop == 1)                                  {                                    /* stop this transmission */                                    return(0);                                  }                                /* mutex is released here */                     }                     /**** End of pause/ stop check ****/ Am I missing something here? The piece of code shown here runs in a thread. Thanks a lot for any pointers. Best Devendra