Re: [Boost-users] Boost Interprocess condition variables

Subject: Re: [Boost-users] Boost Interprocess condition variables
From: Russell L. Carter (rcarter_at_[hidden])
Date: 2009-01-10 11:02:34

I generally handle this by having another thread keep "references"
to all the condvars and one part of that thread's reconfigure()/terminate()
job is to signal all the condvars.  Those threads that were waiting
on the condvars then notice that a reconfigure_/terminate_ bool is
set and proceed accordingly...

Zeljko Vrba wrote:
> On Sat, Jan 10, 2009 at 11:45:03AM +0100, Federico Golfrè Andreasi wrote:
>> Infact process 2 is executed from process 1 using an MPI routine
>> called MPI_Comm_spawn.
>>
> Unless MPI_Comm_spawn is doing something out of the ordinary, then process 2 is
> a direct child of process 1.  You can verify whether this is the case by
> executing "ps axl" and comparing PID and PPID (parent process) for the two
> processes.  If the signal is not delivered, then the MPI library has probably
> arranged that it be blocked / ignored.
> 
> Try the following: right after calling MPI_Init in the parent, use 
> sigprocmask() to explicitly unblock SIGCHLD signal and use sigaction()
> to install the signal handler.
> 
> Otherwise, try finding a supported way of doing this, e.g., by asking on
> a mailing list dedicated to your MPI implementation.
> 
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