On Wed, 9 Feb 2005, McCalla, Mac wrote:
> Hi,
> What is file descriptor 3 (referenced by the write) pointing at
> for this process?
> a NFS mounted file perhaps?
It is writing to the fd of the socket which socketcall() opened. Opening
an NFS mounted file appears no different than opening a locally mounted
file.
>
> -----Original Message-----
> From: lam-bounces_at_[hidden] [mailto:lam-bounces_at_[hidden]] On Behalf
> Of Michael Arndt
> Sent: Tuesday, February 08, 2005 3:57 PM
> To: General LAM/MPI mailing list
> Subject: Re: LAM: Problem connecting lamd on Opteron / RH ES 3.0
>
>
> Hello Anthony,
>
> thanks for your Answer, you are completely right
> about the lamnodes issue.
> My mail was somewhat misleading.
>
>
> my "commercial application" is just stopping any output and
> the job "hangs" forever.
>
> and here is a strace i did inside a shellwrapper from within
> the mpirun command:
>
> uname({sys="Linux", node="cae1", ...}) = 0
> stat64(0x40ed8c00, 0xffffc104) = 0
> getuid32() = 1000
> getcwd("/scratch/lsf.micha.422", 2048) = 23
> chdir("/scratch/lsf.micha.422/lam-micha_at_cae1-lsf-422-0") = 0
> socketcall(0x1, 0xffffc208) = 3
> socketcall(0x3, 0xffffc208) = 0
> chdir("/scratch/lsf.micha.422") = 0
> socketcall(0xf, 0xffffc278) = 0
> socketcall(0xf, 0xffffc278) = 0
> getppid() = 9238
> rt_sigaction(SIGUSR2, {0x1400000040ecc488, [], SA_NOMASK|0x555eb8},
> {SIG_DFL}, 4294950972) = 0
> rt_sigprocmask(SIG_BLOCK, [USR2], [], 4294951176) = 0
> write(3, "\5\0\0\0\377\377\377\377\27$\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
> 96) = 96
>
> can anone make out where / why this "hangs" ?
>
> I am irritated since *exactly* the same config runs
> prefectly well on another cluster ...
>
> TIA
> Micha
>
> _______________________________________________
> This list is archived at http://www.lam-mpi.org/MailArchives/lam/
>
>
>
>
------------------------------------------------------------
Anthony Ciani (aciani1_at_[hidden])
Computational Condensed Matter Physics
Department of Physics, University of Illinois, Chicago
http://ciani.phy.uic.edu/~tony
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