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Subject: Re: [OMPI users] OpenMPI Segmentation fault (11)
From: Jack Bryan (dtustudy68_at_[hidden])
Date: 2010-07-26 02:55:30


Thanks
It can be installed on linux and work with gcc ?
If I have many processes, such as 30, I have to open 30 terminal windows ?
thanks
Jack

> Date: Mon, 26 Jul 2010 08:23:57 +0200
> From: jody.xha_at_[hidden]
> To: users_at_[hidden]
> Subject: Re: [OMPI users] OpenMPI Segmentation fault (11)
>
> Hi Jack
>
> Have you tried to run your aplication under valgrind?
> Even though applications generallay run slower under valgrind,
> it may detect memory errors before the actual crash happens.
>
> The best would be to start a terminal window for each of your processes
> so you can see valgrind's output for each process separately.
>
> Jody
>
> On Mon, Jul 26, 2010 at 4:08 AM, Jack Bryan <dtustudy68_at_[hidden]> wrote:
> > Dear All,
> > I run a 6 parallel processes on OpenMPI.
> > When the run-time of the program is short, it works well.
> > But, if the run-time is long, I got errors:
> > [n124:45521] *** Process received signal ***
> > [n124:45521] Signal: Segmentation fault (11)
> > [n124:45521] Signal code: Address not mapped (1)
> > [n124:45521] Failing at address: 0x44
> > [n124:45521] [ 0] /lib64/libpthread.so.0 [0x3c50e0e4c0]
> > [n124:45521] [ 1] /lib64/libc.so.6(strlen+0x10) [0x3c50278d60]
> > [n124:45521] [ 2] /lib64/libc.so.6(_IO_vfprintf+0x4479) [0x3c50246b19]
> > [n124:45521] [ 3] /lib64/libc.so.6(_IO_printf+0x9a) [0x3c5024d3aa]
> > [n124:45521] [ 4] /home/path/exec [0x40ec9a]
> > [n124:45521] [ 5] /lib64/libc.so.6(__libc_start_main+0xf4) [0x3c5021d974]
> > [n124:45521] [ 6] /home/path/exec [0x401139]
> > [n124:45521] *** End of error message ***
> > It seems that there may be some problems about memory management.
> > But, I cannot find the reason.
> > My program needs to write results to some files.
> > If I open the files too many without closing them, I may get the above
> > errors.
> > But, I have removed the writing files from my program.
> > The problem appears again when the program runs longer time.
> > Any help is appreciated.
> > Jack
> > July 25 2010
> >
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