[mpich-discuss] discuss Digest, Vol 8, Issue 39
Sufeng Niu
sniu at hawk.iit.edu
Mon Jun 24 11:41:44 CDT 2013
Hi, Antonio
Thanks a lot! Now I make sense. Let's say if I am running MPI and
multithreads program. If I called MPI_Barrier in each threads
what gonna happen? Will threads be synced by MPI_Barrier? or I should use
thread level sync?
Thank you!
Sufeng
On Sun, Jun 23, 2013 at 6:54 PM, <discuss-request at mpich.org> wrote:
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> Today's Topics:
>
> 1. Re: Error with MPI_Spawn (Jeff Hammond)
> 2. Re: discuss Digest, Vol 8, Issue 37 (Antonio J. Pe?a)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 23 Jun 2013 17:03:09 -0500
> From: Jeff Hammond <jeff.science at gmail.com>
> To: "discuss at mpich.org" <discuss at mpich.org>
> Subject: Re: [mpich-discuss] Error with MPI_Spawn
> Message-ID: <-1578386667793986954 at unknownmsgid>
> Content-Type: text/plain; charset=ISO-8859-1
>
> This is the wrong way to use PETSc and to parallelize a code with a
> parallel library in general.
>
> Write the PETSc user list and they will explain to you how to
> parallelize your code properly with PETSc.
>
> Jeff
>
> Sent from my iPhone
>
> On Jun 23, 2013, at 4:59 PM, Nitel Muhtaroglu <muhtaroglu.n at gmail.com>
> wrote:
>
> > Hello,
> >
> > I am trying to integrate PETSc library to a serial program. The idea is
> that the serial program creates a linear equation system and then calls
> PETSc solver by MPI_Spawn and then solves this system in parallel. But when
> I execute MPI_Spawn the following error message occurs and the solver is
> not called. I couldn't find a solution to this error. Does anyone have an
> idea about it?
> >
> > Kind Regards,
> > --
> > Nitel
> >
> > **********************************************************
> > Assertion failed in file socksm.c at line 590: hdr.pkt_type ==
> MPIDI_NEM_TCP_SOCKSM_PKT_ID_INFO || hdr.pkt_type ==
> MPIDI_NEM_TCP_SOCKSM_PKT_TMPVC_INFO
> > internal ABORT - process 0
> > INTERNAL ERROR: Invalid error class (66) encountered while returning from
> > MPI_Init. Please file a bug report.
> > Fatal error in MPI_Init: Unknown error. Please file a bug report.,
> error stack:
> > (unknown)(): connection failure
> > [cli_0]: aborting job:
> > Fatal error in MPI_Init: Unknown error. Please file a bug report.,
> error stack:
> > (unknown)(): connection failure
> > **********************************************************
> > _______________________________________________
> > discuss mailing list discuss at mpich.org
> > To manage subscription options or unsubscribe:
> > https://lists.mpich.org/mailman/listinfo/discuss
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 23 Jun 2013 18:54:38 -0500
> From: Antonio J. Pe?a <apenya at mcs.anl.gov>
> To: discuss at mpich.org
> Subject: Re: [mpich-discuss] discuss Digest, Vol 8, Issue 37
> Message-ID: <8872211.IGCl89YM8r at localhost.localdomain>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Sufeng,
>
> The correct way is to use the MPI_Init_thread function with
> MPI_THREAD_MULTIPLE. This will tell the MPI implementation to be thread
> safe. It supports OpenMP and Posix Threads (OpenMP primitives in most
> systems are likely to be implemented on top of PThreads).
>
> Antonio
>
>
> On Sunday, June 23, 2013 11:13:31 AM Sufeng Niu wrote:
>
>
> Hi, Antonio
>
>
> Thanks a lot for your reply, I just figure out that is the firewall issue.
> after I
> set the firewall. it works now. Thanks again.
>
>
> But I still got a few questions on MPI and multithreads mixed programming.
> Currently, I try to run each process on each server, and each process
> using thread pool to run multiple threads (pthread lib). I am not sure
> whether it is the correct way or not. I wrote it as:
>
>
> MPI_Init()
> ....
> ...
> /* create thread pool and initial */
> ......
> /* fetch job into thread pool */
> ......
>
>
> MPI_Finalize();
>
>
> When I check the book and notes, I found people use
>
>
> MPI_Init_thread() with MPI_THREAD_MULTIPLE
>
>
> but the some docs said it supported OpenMP, is that possible to use it
> with pthread library?
> I am new guy to this hybrid programming. I am not sure which is the proper
> way to do it. Any suggestions are appreciate. Thank you!
>
>
> Sufeng
>
>
>
>
> On Sat, Jun 22, 2013 at 12:12 PM, <discuss-request at mpich.org[1]> wrote:
>
>
> Send discuss mailing list submissions to discuss at mpich.org[2]
> https://lists.mpich.org/mailman/listinfo/discuss[3]
> discuss-request at mpich.org[1]
> discuss-owner at mpich.org[4]
> sniu at hawk.iit.edu[5]>To: discuss at mpich.org[2]
> CAFNNHkwpqdGfZXctL0Uz3hpeL25mZZMtB93qGXjc_+tjnV4csA at mail.gmail.c
> om[6]>Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
> Sorry to bother you guys on this stupid question. last time I re-install
> OSfor
> all blades to keep them the same version. after I mount, set keylessssh,
> the terimnal gives the error below:
>
> [proxy:0:1 at iocfccd3.aps.anl.gov[7]]
> HYDU_sock_connect(./utils/sock/sock.c:174): unable to connect from
> "iocfccd3.aps.anl.gov[8]" to"iocfccd1.aps.anl.gov[9]" (No route to host)
> [proxy:0:1 at iocfccd3.aps.anl.gov[7]] main (./pm/pmiserv/pmip.c:189):
> unable toconnect to server iocfccd1.aps.anl.gov[9] at port 38242 (check
> for firewalls!)
>
> I can ssh from iocfccd1 to iocfccd3 without password. Should I shut downall
> firewalls on each server? I cannot find out where is the problem. Thankyou
>
> --Best Regards,Sufeng NiuECASP lab, ECE department, Illinois Institute of
> TechnologyTel: 312-731-7219[10]
> http://lists.mpich.org/pipermail/discuss/attachments/20130621/5503b1bc/a
> ttachment-0001.html[11]>
>
> ------------------------------
>
> Message: 2Date: Fri, 21 Jun 2013 10:58:26 -0500From: Antonio J. Pe?a
> <apenya at mcs.anl.gov[12]>To: discuss at mpich.org[2]
> iocfccd1.aps.anl.gov[9]" from iocfccd3?[1]
>
> Antonio
>
>
> On Friday, June 21, 2013 10:51:50 AM Sufeng Niu wrote:
>
>
> Hi,
>
>
> Sorry to bother you guys on this stupid question. last time I re-install OS
> forall blades to keep them the same version. after I mount, set keyless
> ssh,the terimnal gives the error below:
>
>
> proxy:0:1 at iocfccd3.aps.anl.gov[7][2]]
> HYDU_sock_connect(./utils/sock/sock.c:174): unable to connect from
> "iocfccd3.aps.anl.gov[8][3]"to "iocfccd1.aps.anl.gov[9][1]" (No route to
> host)[proxy:0:1 at iocfccd3.aps.anl.gov[7][2]] main
> (./pm/pmiserv/pmip.c:189):unable to connect to server
> iocfccd1.aps.anl.gov[9][1] at port 38242 (checkfor firewalls!)
>
>
>
> I can ssh from iocfccd1 to iocfccd3 without password. Should I shut downall
> firewalls on each server? I cannot find out where is the problem. Thankyou
>
>
>
>
> -- Best Regards,Sufeng NiuECASP lab, ECE department, Illinois Institute of
> TechnologyTel: 312-731-7219[4]
>
>
> --------[1] _http://iocfccd1.aps.anl.gov_
> proxy%3A0%3A1 at iocfccd3.aps.anl.gov[13]
> http://iocfccd3.aps.anl.gov[8]
> 312-731-7219[10]
> http://lists.mpich.org/pipermail/discuss/attachments/20130621/01b37902/
> attachment-0001.html[14]>
>
> ------------------------------
>
> Message: 3Date: Sat, 22 Jun 2013 12:49:10 -0400From: Jiri Simsa
> <jsimsa at cs.cmu.edu[15]>To: discuss at mpich.org[2]
> CAHs9ut-_6W6SOHTJ_rD+shQ76bo4cTCuFVAy1f9x-
> J0gioakHg at mail.gmail.com[16]>Content-Type: text/plain;
> charset="iso-8859-1"
>
> Hi,
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> End of discuss Digest, Vol 8, Issue 39
> **************************************
>
--
Best Regards,
Sufeng Niu
ECASP lab, ECE department, Illinois Institute of Technology
Tel: 312-731-7219
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