August 2013 - discuss - mailman3.cels.anl.gov

Re: [mpich-discuss] Single slow mpi process
by Reuti 26 Aug '13

26 Aug '13

Am 26.08.2013 um 12:29 schrieb Bob Ilgner: > Dear all, > > When adding #include "mpi.h" and building a single process with mpi, I find that the single process mpi job runs very much slower than a single thread process built with gcc. i.e. 150 to 200% slower, and run as a standalone executable. > > That is, for example > > gcc mycode.c -o mycode.exe > ./mycode > > > will run in 100 seconds. > > > Adding #include "mpi.h" to mycode.c > > mpicc mycode.c -o mycode.exe `mpicc -showme ...` will show the options (and used compiler). Maybe the optimization options are set differently How fast is the application in case you start the Open MPI compilation without `mpirun` but just execute it in the usual way? -- Reuti > mpirun -n 1 mycode.exe > > > will take 180 to 400 seconds to run. > > This varies from system to system on intel, Sparc or IBM based systems. > > Can anyone explain this offhand ? Has anyone else experienced this ? > > > > _______________________________________________ > discuss mailing list discuss(a)mpich.org > To manage subscription options or unsubscribe: > https://lists.mpich.org/mailman/listinfo/discuss

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Single slow mpi process
by Bob Ilgner 26 Aug '13

26 Aug '13

Dear all, When adding #include "mpi.h" and building a single process with mpi, I find that the single process mpi job runs very much slower than a single thread process built with gcc. i.e. 150 to 200% slower, and run as a standalone executable. That is, for example gcc mycode.c -o mycode.exe ./mycode will run in 100 seconds. Adding #include "mpi.h" to mycode.c mpicc mycode.c -o mycode.exe mpirun -n 1 mycode.exe will take 180 to 400 seconds to run. This varies from system to system on intel, Sparc or IBM based systems. Can anyone explain this offhand ? Has anyone else experienced this ?

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Re: [mpich-discuss] regarding parallel proramming error
by Wesley Bland 23 Aug '13

23 Aug '13

Re-adding MPICH-discuss. Please don't remove the mailing list from the CC. I'm not sure what the exact problem is. It's not a problem with your code, so it seems to be a problem with the setup. It could be that you have multiple MPI installations on your machine. When you do `which mpirun`, is it the same installation as `which mpicc` or `which mpiexec`? Do you have the same versions of MPI installed on your remote machines? On Fri, Aug 23, 2013 at 9:16 AM, urmila pol <urmilec(a)gmail.com> wrote: > hello sir, > > I use mpich-3.0.4 version. What is the exact problem. I want > to know . > > With regards, > > Dr.Urmila R. Pol > Assistant Professor, > Department of computer Science, > Shivaji University, Kolhapur. > > > On Fri, Aug 23, 2013 at 5:56 AM, Wesley Bland <wbland(a)mcs.anl.gov> wrote: > >> You code looks pretty much fine to me. The only issue I see is that you >> should pass argc and argv to MPI_Init, not NULL. That probably isn't >> causing the issue though. >> >> Which version of MPICH are you using (mpicc -v)? >> >> >> >> On Fri, Aug 23, 2013 at 1:35 AM, urmila pol <urmilec(a)gmail.com> wrote: >> >>> Dear sir, >>> >>> I have attached all the files and my errors into errorfile please >>> guide me what happen >>> in that case. program is not working for multiple host. >>> my host file is mfile. code is hello2.c >>> waitibg for ur reply. >>> >>> On 8/22/13, Wesley Bland <wbland(a)mcs.anl.gov> wrote: >>> > Edit: >>> > >>> > Can you attach you machine file and the *smallest amount of code that >>> will >>> > reproduce the error*. It's tough to dig through huge amounts of someone >>> > else's code to find the error and while you're trying to reduce the >>> amount >>> > of code, you often find the issue. >>> > >>> > Thanks, >>> > Wesley >>> > >>> > >>> > On Thu, Aug 22, 2013 at 3:46 AM, Mahesh Doijade >>> > <maheshdoijade(a)gmail.com>wrote: >>> > >>> >> Can you attached your machinefile, your code and detailed error >>> output. >>> >> >>> >> >>> >> On Tue, Aug 20, 2013 at 4:11 PM, urmila pol <urmilec(a)gmail.com> >>> wrote: >>> >> >>> >>> Dear sir, >>> >>> >>> >>> I was given following command it will give floating point error . >>> >>> #mpirun -f mfile -np 2 hello4 >>> >>> Floating point exception >>> >>> >>> >>> if I give following it will execute for single node >>> >>> >>> >>> [root@masternode ~]# mpirun -np 2 hello4 >>> >>> Hello world from processor masternode.csd.com, rank 0 out of 2 >>> >>> processors >>> >>> Hello world from processor masternode.csd.com, rank 1 out of 2 >>> >>> processors >>> >>> [root@masternode ~]# >>> >>> >>> >>> Please guide me for above error .waiting for ur reply. >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> On 8/20/13, urmila pol <urmilec(a)gmail.com> wrote: >>> >>> > I do everything now i have one error flaoting point exception i am >>> >>> > running my program now >>> >>> > waiting for ur reply >>> >>> >>> >>> > >>> >>> > With regards, >>> >>> > >>> >>> > Dr.Urmila R. Pol >>> >>> > Assistant Professor, >>> >>> > Department of computer Science, >>> >>> > Shivaji University, Kolhapur. >>> >>> > >>> >>> > >>> >>> > On Tue, Aug 20, 2013 at 10:44 AM, Mahesh Doijade >>> >>> > <maheshdoijade(a)gmail.com>wrote: >>> >>> >>> >>> > >>> >>> >> >>> >>> >> The issue seems to be that you have probably not created a >>> >>> >> machinefile which consists of node name to number of processes >>> >>> >> mapping >>> >>> >> and >>> >>> >> this file should be present in the same dir. of the other nodes on >>> >>> which >>> >>> >> you are launching other MPI processes, this is required in case >>> you >>> >>> want >>> >>> >> to >>> >>> >> run the MPI program across the two or more nodes, you can find >>> more >>> >>> >> details >>> >>> >> of the format in which this information has to be in the >>> machinefile >>> >>> and >>> >>> >> the other requisite steps need for running your MPI program across >>> >>> >> multiple >>> >>> >> nodes from this link >>> >>> >> >>> http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager >>> >>> >> Also, in order to launch the processes across multiple >>> nodes >>> >>> >> you >>> >>> >> need to do ssh passwordless login among those nodes, in case you >>> are >>> >>> >> using >>> >>> >> ssh as the connection mechanism, you can find more details about >>> the >>> >>> >> procedure for ssh passwordless login over here >>> >>> >> http://www.techlitic.com/ssh-passwordless-login.html >>> >>> >> >>> >>> >> >>> >>> >> Regards, >>> >>> >> Mahesh Doijade, >>> >>> >> http://www.techdarting.com/ >>> >>> >> >>> >>> >> >>> >>> >> On Tue, Aug 20, 2013 at 8:34 AM, Pavan Balaji <balaji(a)mcs.anl.gov >>> > >>> >>> wrote: >>> >>> >> >>> >>> >>> >>> >>> >>> I'm pasting the error inline, for others' information. >>> >>> >>> >>> >>> >>> FYI, the error is "unable to open host file: machinefile". >>> >>> >>> >>> >>> >>> ----8<---- >>> >>> >>> mpirun -f machinefile -n 2 /home/urp/mpich-install/hello >>> >>> >>> [mpiexec(a)masternode.csd.com] HYDU_parse_hostfile >>> >>> >>> (./utils/args/args.c:323): unable to open host file: machinefile >>> >>> >>> [mpiexec(a)masternode.csd.com] mfile_fn (./ui/mpich/utils.c:341): >>> >>> >>> error >>> >>> >>> parsing hostfile >>> >>> >>> [mpiexec(a)masternode.csd.com] match_arg >>> (./utils/args/args.c:153): >>> >>> match >>> >>> >>> handler returned error >>> >>> >>> [mpiexec(a)masternode.csd.com] HYDU_parse_array >>> >>> (./utils/args/args.c:175): >>> >>> >>> argument matching returned error >>> >>> >>> [mpiexec(a)masternode.csd.com] parse_args >>> (./ui/mpich/utils.c:1609): >>> >>> error >>> >>> >>> parsing input array >>> >>> >>> [mpiexec(a)masternode.csd.com] HYD_uii_mpx_get_parameters >>> >>> >>> (./ui/mpich/utils.c:1660): unable to parse user arguments >>> >>> >>> [mpiexec(a)masternode.csd.com] main (./ui/mpich/mpiexec.c:153): >>> error >>> >>> >>> parsing parameters >>> >>> >>> [root@masternode ~]# >>> >>> >>> ----8<---- >>> >>> >>> >>> >>> >>> On 08/19/2013 01:27 AM, urmila pol wrote: >>> >>> >>> >>> >>> >>>> Dear sir, >>> >>> >>>> >>> >>> >>>> I have attaching the screenshots of my errors please guide me >>> >>> .waiting >>> >>> >>>> for reply. >>> >>> >>>> >>> >>> >>>> >>> >>> >>>> With regards, >>> >>> >>>> >>> >>> >>>> Dr.Urmila R. Pol >>> >>> >>>> Assistant Professor, >>> >>> >>>> Department of computer Science, >>> >>> >>>> Shivaji University, Kolhapur. >>> >>> >>>> >>> >>> >>>> >>> >>> >>> -- >>> >>> >>> Pavan Balaji >>> >>> >>> http://www.mcs.anl.gov/~balaji >>> >>> >>> ______________________________**_________________ >>> >>> >>> >>> >>> discuss mailing list discuss(a)mpich.org >>> >>> >>> To manage subscription options or unsubscribe: >>> >>> >>> https://lists.mpich.org/**mailman/listinfo/discuss< >>> >>> https://lists.mpich.org/mailman/listinfo/discuss> >>> >>> >>> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> > >>> >>> >>> >>> >>> >>> -- >>> >>> >>> >>> With regards, >>> >>> >>> >>> Dr.Urmila R. Pol >>> >>> Assistant Professor, >>> >>> Department of computer Science, >>> >>> Shivaji University, Kolhapur. >>> >>> >>> >> >>> >> >>> >> >>> >> -- >>> >> >>> >> Regards, >>> >> -- Mahesh Doijade >>> >> >>> >> >>> >> >>> >> >>> >> >>> >> _______________________________________________ >>> >> discuss mailing list discuss(a)mpich.org >>> >> To manage subscription options or unsubscribe: >>> >> https://lists.mpich.org/mailman/listinfo/discuss >>> >> >>> > >>> >>> >>> -- >>> With regards, >>> >>> Dr.Urmila R. Pol >>> Assistant Professor, >>> Department of computer Science, >>> Shivaji University, Kolhapur. >>> >> >> >

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Re: [mpich-discuss] regarding parallel proramming error
by Wesley Bland 23 Aug '13

23 Aug '13

You code looks pretty much fine to me. The only issue I see is that you should pass argc and argv to MPI_Init, not NULL. That probably isn't causing the issue though. Which version of MPICH are you using (mpicc -v)? On Fri, Aug 23, 2013 at 1:35 AM, urmila pol <urmilec(a)gmail.com> wrote: > Dear sir, > > I have attached all the files and my errors into errorfile please > guide me what happen > in that case. program is not working for multiple host. > my host file is mfile. code is hello2.c > waitibg for ur reply. > > On 8/22/13, Wesley Bland <wbland(a)mcs.anl.gov> wrote: > > Edit: > > > > Can you attach you machine file and the *smallest amount of code that > will > > reproduce the error*. It's tough to dig through huge amounts of someone > > else's code to find the error and while you're trying to reduce the > amount > > of code, you often find the issue. > > > > Thanks, > > Wesley > > > > > > On Thu, Aug 22, 2013 at 3:46 AM, Mahesh Doijade > > <maheshdoijade(a)gmail.com>wrote: > > > >> Can you attached your machinefile, your code and detailed error output. > >> > >> > >> On Tue, Aug 20, 2013 at 4:11 PM, urmila pol <urmilec(a)gmail.com> wrote: > >> > >>> Dear sir, > >>> > >>> I was given following command it will give floating point error . > >>> #mpirun -f mfile -np 2 hello4 > >>> Floating point exception > >>> > >>> if I give following it will execute for single node > >>> > >>> [root@masternode ~]# mpirun -np 2 hello4 > >>> Hello world from processor masternode.csd.com, rank 0 out of 2 > >>> processors > >>> Hello world from processor masternode.csd.com, rank 1 out of 2 > >>> processors > >>> [root@masternode ~]# > >>> > >>> Please guide me for above error .waiting for ur reply. > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> On 8/20/13, urmila pol <urmilec(a)gmail.com> wrote: > >>> > I do everything now i have one error flaoting point exception i am > >>> > running my program now > >>> > waiting for ur reply > >>> > >>> > > >>> > With regards, > >>> > > >>> > Dr.Urmila R. Pol > >>> > Assistant Professor, > >>> > Department of computer Science, > >>> > Shivaji University, Kolhapur. > >>> > > >>> > > >>> > On Tue, Aug 20, 2013 at 10:44 AM, Mahesh Doijade > >>> > <maheshdoijade(a)gmail.com>wrote: > >>> > >>> > > >>> >> > >>> >> The issue seems to be that you have probably not created a > >>> >> machinefile which consists of node name to number of processes > >>> >> mapping > >>> >> and > >>> >> this file should be present in the same dir. of the other nodes on > >>> which > >>> >> you are launching other MPI processes, this is required in case you > >>> want > >>> >> to > >>> >> run the MPI program across the two or more nodes, you can find more > >>> >> details > >>> >> of the format in which this information has to be in the machinefile > >>> and > >>> >> the other requisite steps need for running your MPI program across > >>> >> multiple > >>> >> nodes from this link > >>> >> > http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager > >>> >> Also, in order to launch the processes across multiple nodes > >>> >> you > >>> >> need to do ssh passwordless login among those nodes, in case you are > >>> >> using > >>> >> ssh as the connection mechanism, you can find more details about the > >>> >> procedure for ssh passwordless login over here > >>> >> http://www.techlitic.com/ssh-passwordless-login.html > >>> >> > >>> >> > >>> >> Regards, > >>> >> Mahesh Doijade, > >>> >> http://www.techdarting.com/ > >>> >> > >>> >> > >>> >> On Tue, Aug 20, 2013 at 8:34 AM, Pavan Balaji <balaji(a)mcs.anl.gov> > >>> wrote: > >>> >> > >>> >>> > >>> >>> I'm pasting the error inline, for others' information. > >>> >>> > >>> >>> FYI, the error is "unable to open host file: machinefile". > >>> >>> > >>> >>> ----8<---- > >>> >>> mpirun -f machinefile -n 2 /home/urp/mpich-install/hello > >>> >>> [mpiexec(a)masternode.csd.com] HYDU_parse_hostfile > >>> >>> (./utils/args/args.c:323): unable to open host file: machinefile > >>> >>> [mpiexec(a)masternode.csd.com] mfile_fn (./ui/mpich/utils.c:341): > >>> >>> error > >>> >>> parsing hostfile > >>> >>> [mpiexec(a)masternode.csd.com] match_arg (./utils/args/args.c:153): > >>> match > >>> >>> handler returned error > >>> >>> [mpiexec(a)masternode.csd.com] HYDU_parse_array > >>> (./utils/args/args.c:175): > >>> >>> argument matching returned error > >>> >>> [mpiexec(a)masternode.csd.com] parse_args (./ui/mpich/utils.c:1609): > >>> error > >>> >>> parsing input array > >>> >>> [mpiexec(a)masternode.csd.com] HYD_uii_mpx_get_parameters > >>> >>> (./ui/mpich/utils.c:1660): unable to parse user arguments > >>> >>> [mpiexec(a)masternode.csd.com] main (./ui/mpich/mpiexec.c:153): > error > >>> >>> parsing parameters > >>> >>> [root@masternode ~]# > >>> >>> ----8<---- > >>> >>> > >>> >>> On 08/19/2013 01:27 AM, urmila pol wrote: > >>> >>> > >>> >>>> Dear sir, > >>> >>>> > >>> >>>> I have attaching the screenshots of my errors please guide me > >>> .waiting > >>> >>>> for reply. > >>> >>>> > >>> >>>> > >>> >>>> With regards, > >>> >>>> > >>> >>>> Dr.Urmila R. Pol > >>> >>>> Assistant Professor, > >>> >>>> Department of computer Science, > >>> >>>> Shivaji University, Kolhapur. > >>> >>>> > >>> >>>> > >>> >>> -- > >>> >>> Pavan Balaji > >>> >>> http://www.mcs.anl.gov/~balaji > >>> >>> ______________________________**_________________ > >>> > >>> >>> discuss mailing list discuss(a)mpich.org > >>> >>> To manage subscription options or unsubscribe: > >>> >>> https://lists.mpich.org/**mailman/listinfo/discuss< > >>> https://lists.mpich.org/mailman/listinfo/discuss> > >>> >>> > >>> >> > >>> >> > >>> >> > >>> >> > >>> >> > >>> >> > >>> >> > >>> >> > >>> > > >>> > >>> > >>> -- > >>> > >>> With regards, > >>> > >>> Dr.Urmila R. Pol > >>> Assistant Professor, > >>> Department of computer Science, > >>> Shivaji University, Kolhapur. > >>> > >> > >> > >> > >> -- > >> > >> Regards, > >> -- Mahesh Doijade > >> > >> > >> > >> > >> > >> _______________________________________________ > >> discuss mailing list discuss(a)mpich.org > >> To manage subscription options or unsubscribe: > >> https://lists.mpich.org/mailman/listinfo/discuss > >> > > > > > -- > With regards, > > Dr.Urmila R. Pol > Assistant Professor, > Department of computer Science, > Shivaji University, Kolhapur. >

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Re: [mpich-discuss] MPD problem
by hamideh jabalameli 23 Aug '13

23 Aug '13

I solve this problem. I write this solution that other friends can use. I change hostname to localhost.localdomain (127.0.0.1) with the following command: hostnamectl set-hostname 127.0.0.1 I didnt received the previous error. but : configuration file /Users/fangohr/.mpd.conf not found A file named .mpd.conf file must be present in the user's home directory (/etc/mpd.conf if root) with read and write access only for the user, and must contain at least a line with: MPD_SECRETWORD=<secretword> One way to safely create this file is to do the following: cd $HOME touch .mpd.conf chmod 600 .mpd.conf and then use an editor to insert a line like MPD_SECRETWORD=mr45-j9z into the file therefore, I do once these steps. and I can run mpd and mpd -d. :) On Thu, Aug 22, 2013 at 9:32 PM, hamideh jabalameli < hamideh.jabalameli(a)gmail.com> wrote: > Hi dear friends > I'm trying to run my mpi programs. I should run (mpd -d) in my terminal > commands. but i got only this: > > mpd failed: gethostbyname_ex failed for linux-ut6d.site > > {linux-ut6d.site is my Hostname.Domainname} > > Any idea? > > please help me immediately... > > -- > *Best Regards* > * > > Hamideh Jabalameli* > > M.Sc Candidate, > School of Electrical and Computer Engineering, > College of Engineering, > Electronici Shahid Beheshti Tehran University > h.jabal(a)Mail.sbu.ac.ir > hamideh.jabalameli(a)gmail.com > -- *Best Regards* * Hamideh Jabalameli* M.Sc Candidate, School of Electrical and Computer Engineering, College of Engineering, Electronici Shahid Beheshti Tehran University h.jabal(a)Mail.sbu.ac.ir hamideh.jabalameli(a)gmail.com

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Re: [mpich-discuss] MPD problem
by Wesley Bland 22 Aug '13

22 Aug '13

Hamideh, Which version of MPICH are you using? My guess is that it's very old as MPD has not been the default process manager since version 1.3. You can check out the wiki page here ( http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_My_MPD_…) for pointers about using MPD, but in general the suggestion here would be to update to a much more recent version of MPICH. The current stable version is 3.0.4. Thanks, Wesley On Thu, Aug 22, 2013 at 12:02 PM, hamideh jabalameli < hamideh.jabalameli(a)gmail.com> wrote: > Hi dear friends > I'm trying to run my mpi programs. I should run (mpd -d) in my terminal > commands. but i got only this: > > mpd failed: gethostbyname_ex failed for linux-ut6d.site > > {linux-ut6d.site is my Hostname.Domainname} > > Any idea? > > please help me immediately... > > -- > *Best Regards* > * > > Hamideh Jabalameli* > > M.Sc Candidate, > School of Electrical and Computer Engineering, > College of Engineering, > Electronici Shahid Beheshti Tehran University > h.jabal(a)Mail.sbu.ac.ir > hamideh.jabalameli(a)gmail.com > > _______________________________________________ > discuss mailing list discuss(a)mpich.org > To manage subscription options or unsubscribe: > https://lists.mpich.org/mailman/listinfo/discuss >

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MPD problem
by hamideh jabalameli 22 Aug '13

22 Aug '13

Hi dear friends I'm trying to run my mpi programs. I should run (mpd -d) in my terminal commands. but i got only this: mpd failed: gethostbyname_ex failed for linux-ut6d.site {linux-ut6d.site is my Hostname.Domainname} Any idea? please help me immediately... -- *Best Regards* * Hamideh Jabalameli* M.Sc Candidate, School of Electrical and Computer Engineering, College of Engineering, Electronici Shahid Beheshti Tehran University h.jabal(a)Mail.sbu.ac.ir hamideh.jabalameli(a)gmail.com

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Re: [mpich-discuss] regarding parallel proramming error
by Wesley Bland 22 Aug '13

22 Aug '13

Edit: Can you attach you machine file and the *smallest amount of code that will reproduce the error*. It's tough to dig through huge amounts of someone else's code to find the error and while you're trying to reduce the amount of code, you often find the issue. Thanks, Wesley On Thu, Aug 22, 2013 at 3:46 AM, Mahesh Doijade <maheshdoijade(a)gmail.com>wrote: > Can you attached your machinefile, your code and detailed error output. > > > On Tue, Aug 20, 2013 at 4:11 PM, urmila pol <urmilec(a)gmail.com> wrote: > >> Dear sir, >> >> I was given following command it will give floating point error . >> #mpirun -f mfile -np 2 hello4 >> Floating point exception >> >> if I give following it will execute for single node >> >> [root@masternode ~]# mpirun -np 2 hello4 >> Hello world from processor masternode.csd.com, rank 0 out of 2 processors >> Hello world from processor masternode.csd.com, rank 1 out of 2 processors >> [root@masternode ~]# >> >> Please guide me for above error .waiting for ur reply. >> >> >> >> >> >> >> >> On 8/20/13, urmila pol <urmilec(a)gmail.com> wrote: >> > I do everything now i have one error flaoting point exception i am >> > running my program now >> > waiting for ur reply >> >> > >> > With regards, >> > >> > Dr.Urmila R. Pol >> > Assistant Professor, >> > Department of computer Science, >> > Shivaji University, Kolhapur. >> > >> > >> > On Tue, Aug 20, 2013 at 10:44 AM, Mahesh Doijade >> > <maheshdoijade(a)gmail.com>wrote: >> >> > >> >> >> >> The issue seems to be that you have probably not created a >> >> machinefile which consists of node name to number of processes mapping >> >> and >> >> this file should be present in the same dir. of the other nodes on >> which >> >> you are launching other MPI processes, this is required in case you >> want >> >> to >> >> run the MPI program across the two or more nodes, you can find more >> >> details >> >> of the format in which this information has to be in the machinefile >> and >> >> the other requisite steps need for running your MPI program across >> >> multiple >> >> nodes from this link >> >> http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager >> >> Also, in order to launch the processes across multiple nodes you >> >> need to do ssh passwordless login among those nodes, in case you are >> >> using >> >> ssh as the connection mechanism, you can find more details about the >> >> procedure for ssh passwordless login over here >> >> http://www.techlitic.com/ssh-passwordless-login.html >> >> >> >> >> >> Regards, >> >> Mahesh Doijade, >> >> http://www.techdarting.com/ >> >> >> >> >> >> On Tue, Aug 20, 2013 at 8:34 AM, Pavan Balaji <balaji(a)mcs.anl.gov> >> wrote: >> >> >> >>> >> >>> I'm pasting the error inline, for others' information. >> >>> >> >>> FYI, the error is "unable to open host file: machinefile". >> >>> >> >>> ----8<---- >> >>> mpirun -f machinefile -n 2 /home/urp/mpich-install/hello >> >>> [mpiexec(a)masternode.csd.com] HYDU_parse_hostfile >> >>> (./utils/args/args.c:323): unable to open host file: machinefile >> >>> [mpiexec(a)masternode.csd.com] mfile_fn (./ui/mpich/utils.c:341): error >> >>> parsing hostfile >> >>> [mpiexec(a)masternode.csd.com] match_arg (./utils/args/args.c:153): >> match >> >>> handler returned error >> >>> [mpiexec(a)masternode.csd.com] HYDU_parse_array >> (./utils/args/args.c:175): >> >>> argument matching returned error >> >>> [mpiexec(a)masternode.csd.com] parse_args (./ui/mpich/utils.c:1609): >> error >> >>> parsing input array >> >>> [mpiexec(a)masternode.csd.com] HYD_uii_mpx_get_parameters >> >>> (./ui/mpich/utils.c:1660): unable to parse user arguments >> >>> [mpiexec(a)masternode.csd.com] main (./ui/mpich/mpiexec.c:153): error >> >>> parsing parameters >> >>> [root@masternode ~]# >> >>> ----8<---- >> >>> >> >>> On 08/19/2013 01:27 AM, urmila pol wrote: >> >>> >> >>>> Dear sir, >> >>>> >> >>>> I have attaching the screenshots of my errors please guide me >> .waiting >> >>>> for reply. >> >>>> >> >>>> >> >>>> With regards, >> >>>> >> >>>> Dr.Urmila R. Pol >> >>>> Assistant Professor, >> >>>> Department of computer Science, >> >>>> Shivaji University, Kolhapur. >> >>>> >> >>>> >> >>> -- >> >>> Pavan Balaji >> >>> http://www.mcs.anl.gov/~balaji >> >>> ______________________________**_________________ >> >> >>> discuss mailing list discuss(a)mpich.org >> >>> To manage subscription options or unsubscribe: >> >>> https://lists.mpich.org/**mailman/listinfo/discuss< >> https://lists.mpich.org/mailman/listinfo/discuss> >> >>> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> > >> >> >> -- >> >> With regards, >> >> Dr.Urmila R. Pol >> Assistant Professor, >> Department of computer Science, >> Shivaji University, Kolhapur. >> > > > > -- > > Regards, > -- Mahesh Doijade > > > > > > _______________________________________________ > discuss mailing list discuss(a)mpich.org > To manage subscription options or unsubscribe: > https://lists.mpich.org/mailman/listinfo/discuss >

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Re: [mpich-discuss] regarding parallel proramming error
by Mahesh Doijade 22 Aug '13

22 Aug '13

Can you attached your machinefile, your code and detailed error output. On Tue, Aug 20, 2013 at 4:11 PM, urmila pol <urmilec(a)gmail.com> wrote: > Dear sir, > > I was given following command it will give floating point error . > #mpirun -f mfile -np 2 hello4 > Floating point exception > > if I give following it will execute for single node > > [root@masternode ~]# mpirun -np 2 hello4 > Hello world from processor masternode.csd.com, rank 0 out of 2 processors > Hello world from processor masternode.csd.com, rank 1 out of 2 processors > [root@masternode ~]# > > Please guide me for above error .waiting for ur reply. > > > > > > > > On 8/20/13, urmila pol <urmilec(a)gmail.com> wrote: > > I do everything now i have one error flaoting point exception i am > > running my program now > > waiting for ur reply > > > > With regards, > > > > Dr.Urmila R. Pol > > Assistant Professor, > > Department of computer Science, > > Shivaji University, Kolhapur. > > > > > > On Tue, Aug 20, 2013 at 10:44 AM, Mahesh Doijade > > <maheshdoijade(a)gmail.com>wrote: > > > >> > >> The issue seems to be that you have probably not created a > >> machinefile which consists of node name to number of processes mapping > >> and > >> this file should be present in the same dir. of the other nodes on which > >> you are launching other MPI processes, this is required in case you want > >> to > >> run the MPI program across the two or more nodes, you can find more > >> details > >> of the format in which this information has to be in the machinefile and > >> the other requisite steps need for running your MPI program across > >> multiple > >> nodes from this link > >> http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager > >> Also, in order to launch the processes across multiple nodes you > >> need to do ssh passwordless login among those nodes, in case you are > >> using > >> ssh as the connection mechanism, you can find more details about the > >> procedure for ssh passwordless login over here > >> http://www.techlitic.com/ssh-passwordless-login.html > >> > >> > >> Regards, > >> Mahesh Doijade, > >> http://www.techdarting.com/ > >> > >> > >> On Tue, Aug 20, 2013 at 8:34 AM, Pavan Balaji <balaji(a)mcs.anl.gov> > wrote: > >> > >>> > >>> I'm pasting the error inline, for others' information. > >>> > >>> FYI, the error is "unable to open host file: machinefile". > >>> > >>> ----8<---- > >>> mpirun -f machinefile -n 2 /home/urp/mpich-install/hello > >>> [mpiexec(a)masternode.csd.com] HYDU_parse_hostfile > >>> (./utils/args/args.c:323): unable to open host file: machinefile > >>> [mpiexec(a)masternode.csd.com] mfile_fn (./ui/mpich/utils.c:341): error > >>> parsing hostfile > >>> [mpiexec(a)masternode.csd.com] match_arg (./utils/args/args.c:153): > match > >>> handler returned error > >>> [mpiexec(a)masternode.csd.com] HYDU_parse_array > (./utils/args/args.c:175): > >>> argument matching returned error > >>> [mpiexec(a)masternode.csd.com] parse_args (./ui/mpich/utils.c:1609): > error > >>> parsing input array > >>> [mpiexec(a)masternode.csd.com] HYD_uii_mpx_get_parameters > >>> (./ui/mpich/utils.c:1660): unable to parse user arguments > >>> [mpiexec(a)masternode.csd.com] main (./ui/mpich/mpiexec.c:153): error > >>> parsing parameters > >>> [root@masternode ~]# > >>> ----8<---- > >>> > >>> On 08/19/2013 01:27 AM, urmila pol wrote: > >>> > >>>> Dear sir, > >>>> > >>>> I have attaching the screenshots of my errors please guide me .waiting > >>>> for reply. > >>>> > >>>> > >>>> With regards, > >>>> > >>>> Dr.Urmila R. Pol > >>>> Assistant Professor, > >>>> Department of computer Science, > >>>> Shivaji University, Kolhapur. > >>>> > >>>> > >>> -- > >>> Pavan Balaji > >>> http://www.mcs.anl.gov/~balaji > >>> ______________________________**_________________ > >>> discuss mailing list discuss(a)mpich.org > >>> To manage subscription options or unsubscribe: > >>> https://lists.mpich.org/**mailman/listinfo/discuss< > https://lists.mpich.org/mailman/listinfo/discuss> > >>> > >> > >> > >> > >> > >> > >> > >> > >> > > > > > -- > With regards, > > Dr.Urmila R. Pol > Assistant Professor, > Department of computer Science, > Shivaji University, Kolhapur. > -- Regards, -- Mahesh Doijade

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Re: [mpich-discuss] regarding parallel proramming error
by Mahesh Doijade 20 Aug '13

20 Aug '13

The issue seems to be that you have probably not created a machinefile which consists of node name to number of processes mapping and this file should be present in the same dir. of the other nodes on which you are launching other MPI processes, this is required in case you want to run the MPI program across the two or more nodes, you can find more details of the format in which this information has to be in the machinefile and the other requisite steps need for running your MPI program across multiple nodes from this link http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager Also, in order to launch the processes across multiple nodes you need to do ssh passwordless login among those nodes, in case you are using ssh as the connection mechanism, you can find more details about the procedure for ssh passwordless login over here http://www.techlitic.com/ssh-passwordless-login.html Regards, Mahesh Doijade, http://www.techdarting.com/ On Tue, Aug 20, 2013 at 8:34 AM, Pavan Balaji <balaji(a)mcs.anl.gov> wrote: > > I'm pasting the error inline, for others' information. > > FYI, the error is "unable to open host file: machinefile". > > ----8<---- > mpirun -f machinefile -n 2 /home/urp/mpich-install/hello > [mpiexec(a)masternode.csd.com] HYDU_parse_hostfile > (./utils/args/args.c:323): unable to open host file: machinefile > [mpiexec(a)masternode.csd.com] mfile_fn (./ui/mpich/utils.c:341): error > parsing hostfile > [mpiexec(a)masternode.csd.com] match_arg (./utils/args/args.c:153): match > handler returned error > [mpiexec(a)masternode.csd.com] HYDU_parse_array (./utils/args/args.c:175): > argument matching returned error > [mpiexec(a)masternode.csd.com] parse_args (./ui/mpich/utils.c:1609): error > parsing input array > [mpiexec(a)masternode.csd.com] HYD_uii_mpx_get_parameters > (./ui/mpich/utils.c:1660): unable to parse user arguments > [mpiexec(a)masternode.csd.com] main (./ui/mpich/mpiexec.c:153): error > parsing parameters > [root@masternode ~]# > ----8<---- > > On 08/19/2013 01:27 AM, urmila pol wrote: > >> Dear sir, >> >> I have attaching the screenshots of my errors please guide me .waiting >> for reply. >> >> >> With regards, >> >> Dr.Urmila R. Pol >> Assistant Professor, >> Department of computer Science, >> Shivaji University, Kolhapur. >> >> > -- > Pavan Balaji > http://www.mcs.anl.gov/~balaji > ______________________________**_________________ > discuss mailing list discuss(a)mpich.org > To manage subscription options or unsubscribe: > https://lists.mpich.org/**mailman/listinfo/discuss<https://lists.mpich.org/mailman/listinfo/discuss> >

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