[petsc-users] error running parallel on cluster
Matthew Knepley
knepley at gmail.com
Mon Apr 16 20:44:43 CDT 2018
On Mon, Apr 16, 2018 at 9:39 PM, Sepideh Kavousi <skavou1 at lsu.edu> wrote:
> this is not used forghost points . my code is :
>
1) You are using ghost points, since you use i-1 as an index
2) I was wrong. X_t should also be ghosted.
Run under valgrind.
Thanks,
Matt
> for (j=info2->ys;j<info2->ys+info2->ym;j++){
> for (i=info2->xs;i<info2->xs+info2->xm;i++){
> if (i==0) {aF[j][i].U=aY[j][i+1].U-aY[j][i].U ;
> aF[j][i].p=aY[j][i+1].p-aY[j][i].p ;}
> else if (i==info2->mx-1) {aF[j][i].U=aY[j][i-1].U-aY[j][i].U
> ; aF[j][i].p=aY[j][i].p-aY[j][i-1].p ;}
> else if (j==0) {aF[j][i].U=aY[j+1][i].U-aY[j][i].U;
> aF[j][i].p=aY[j+1][i].p-aY[j][i].p ;}
> else if (j==info2->my-1) {aF[j][i].U=aY[j-1][i].U-aY[j][i].U
> ; aF[j][i].p=aY[j][i].p-aY[j-1][i].p ;}
> else {
> //derivatives of U and p
> Px=(aY[j][i+1].p-aY[j][i-1].p)/(2.0*user->hx);
> Py=(aY[j+1][i].p-aY[j-1][i].p)/(2.0*user->hy);
> Pxx=((aY[j][i+1].p+aY[j][i-1].p-2.0*aY[j][i].p)/(hx2));
> Pxy=((aY[j+1][i+1].p+aY[j-1][
> i-1].p-aY[j+1][i-1].p-aY[j-1][i+1].p)/(4.0*hxy));
> Pyy=((aY[j+1][i].p+aY[j-1][i].p-2.0*aY[j][i].p)/hy2);
> Pxt=(aYdot[j][i+1].p-aYdot[j][i-1].p)/(2.0*user->hx);
> Pyt=(aYdot[j+1][i].p-aYdot[j-1][i].p)/(2.0*user->hy);
>
>
> if (((Px*Px)+(Py*Py))>0.0 ) { //
> theta=PetscAtanReal(Py/Px);
> thetax=(Px*Pxy-Py*Pxx)/((Px*Px)+(Py*Py));
> thetay=(Px*Pyy-Py*Pxy)/((Px*Px)+(Py*Py));
> }
> else {
> theta=PETSC_PI*0.5;
> thetax=0.0;
> thetay=0.0;
> }
> e=(1.0+user->epsilon*cos(4.0*theta));;
> ep=-(4.0*user->epsilon*sin(4.0*theta));
> epp=-(4.0*user->epsilon*4.0*cos(4.0*theta));
>
>
>
> Ux=(aY[j][i+1].U-aY[j][i-1].U)/(2.0*user->hx);
> Uy=(aY[j+1][i].U-aY[j-1][i].U)/(2.0*user->hy);
> Uxx=((aY[j][i+1].U+aY[j][i-1].U-2.0*aY[j][i].U)/(hx2));
> Uyy=((aY[j+1][i].U+aY[j-1][i].U-2.0*aY[j][i].U)/hy2);
>
> U1=user->D*user->tau_0/(user->W*user->W);
> U2= ((Px*Px+Py*Py)>0.0) ? user->a_p/sqrt(Px*Px+Py*Py) :
> 0.0 ;
> //U2=0.0;
> P1= (user->W*user->hy*j-user->Vp*user->tau_0*t)/user->lT;
>
> aF[j][i].U=(U1*(-0.5*(Ux*Px+Uy*Py)+0.5*(1-aY[j][i].p)*(
> Uxx+Uyy))+U2*(1+(1-user->k)*aY[j][i].U)*(Pxt*Px+Pyt*Py+
> aYdot[j][i].p*(Pxx+Pyy))+U2*(1-user->k)*aYdot[j][i].p*(Ux*
> Px+Uy*Py)+0.5*(1+(1-user->k)*aY[j][i].U)*aYdot[j][i].p-0.5*
> (1+user->k-(1-user->k)*aY[j][i].p)*aYdot[j][i].U)*hx2;
>
> aF[j][i].p=( e*e*(Pxx+Pyy)+2.0*e*ep*(
> thetax*Px+thetay*Py)+(e*epp+ep*ep)*(thetay*Px-thetax*Py)+(
> aY[j][i].p-aY[j][i].p*aY[j][i].p*aY[j][i].p)-user->lambda*(
> aY[j][i].p*aY[j][i].p-1)*(aY[j][i].p*aY[j][i].p-1)*(aY[j][
> i].U+P1)-(1-(1-user->k)*P1)*(1.0+4.0*user->epsilon*cos(4.0*
> theta))*(1.0+4.0*user->epsilon*cos(4.0*theta))*aYdot[j][i].p )*hx2 ;
>
> }
> }
>
> Sepideh
> ------------------------------
> *From:* Matthew Knepley <knepley at gmail.com>
> *Sent:* Monday, April 16, 2018 8:36:37 PM
> *To:* Sepideh Kavousi
> *Cc:* petsc-users at mcs.anl.gov
> *Subject:* Re: [petsc-users] error running parallel on cluster
>
> On Mon, Apr 16, 2018 at 9:20 PM, Sepideh Kavousi <skavou1 at lsu.edu> wrote:
>
> Hello,
> I am solving a PDE where I have the spacial derivtive of the time
> derivative of a variable. In the DMDATSSetIFunctionLocal function I
> defined d(dY/dt)/dx as:
> (aYdot[j][i+1].p-aYdot[j][i-1].p)/(2.0*user->hx)
>
>
> I do not think that you get ghosted Ydot in that function.
>
> Matt
>
>
> on my workstation, it is working but on the cluster it gives an error. I
> can not run with debugger on the cluster but I have checked and the error
> is related to this part and I do not have any problem on cluster when
> running in series. Can you please help me about it.
>
> the error is:
> 0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
> probably memory access out of range
> [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> [0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/d
> ocumentation/faq.html#valgrind
> [0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS
> X to find memory corruption errors
> [0]PETSC ERROR: likely location of problem given in stack below
> [0]PETSC ERROR: --------------------- Stack Frames
> ------------------------------------
> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not
> available,
> [0]PETSC ERROR: INSTEAD the line number of the start of the function
> [0]PETSC ERROR: is given.
> [0]PETSC ERROR: [0] TSComputeIFunction_DMDA line 63
> /ddnB/work/skavou1/petsc/src/ts/utils/dmdats.c
> [0]PETSC ERROR: [0] TS user implicit function line 829
> /ddnB/work/skavou1/petsc/src/ts/interface/ts.c
> [0]PETSC ERROR: [0] TSComputeIFunction line 815
> /ddnB/work/skavou1/petsc/src/ts/interface/ts.c
> [0]PETSC ERROR: [0] SNESTSFormFunction_Theta line 640
> /ddnB/work/skavou1/petsc/src/ts/impls/implicit/theta/theta.c
> [0]PETSC ERROR: [0] SNESTSFormFunction line 4564
> /ddnB/work/skavou1/petsc/src/ts/interface/ts.c
> [0]PETSC ERROR: [0] SNES user function line 2202
> /ddnB/work/skavou1/petsc/src/snes/interface/snes.c
> [0]PETSC ERROR: [0] SNESComputeFunction line 2187
> /ddnB/work/skavou1/petsc/src/snes/interface/snes.c
> [0]PETSC ERROR: [0] SNESSolve_NEWTONTR line 90
> /ddnB/work/skavou1/petsc/src/snes/impls/tr/tr.c
> [0]PETSC ERROR: [0] SNESSolve line 4203 /ddnB/work/skavou1/petsc/src/s
> nes/interface/snes.c
> [0]PETSC ERROR: [0] TSTheta_SNESSolve line 175
> /ddnB/work/skavou1/petsc/src/ts/impls/implicit/theta/theta.c
> [0]PETSC ERROR: [0] TSStep_Theta line 191 /ddnB/work/skavou1/petsc/src/t
> s/impls/implicit/theta/theta.c
> [0]PETSC ERROR: [0] TSStep line 3526 /ddnB/work/skavou1/petsc/src/t
> s/interface/ts.c
> [0]PETSC ERROR: [0] TSSolve line 3668 /ddnB/work/skavou1/petsc/src/t
> s/interface/ts.c
> [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> [0]PETSC ERROR: Signal received
> [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html
> for trouble shooting.
> [0]PETSC ERROR: Petsc Release Version 3.9.0, unknown
> [0]PETSC ERROR: ./one.out on a debug named mike1 by skavou1 Mon Apr 16
> 20:11:44 2018
> [0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++
> --with-fc=gfortran --download-mpich --download-fblaslapack
> [0]PETSC ERROR: #1 User provided function() line 0 in unknown file
> application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
> ==29057==
> ==29057== HEAP SUMMARY:
> ==29057== in use at exit: 560,151 bytes in 383 blocks
> ==29057== total heap usage: 8,734 allocs, 8,351 frees, 4,449,350 bytes
> allocated
> ==29057==
> ==29057== LEAK SUMMARY:
> ==29057== definitely lost: 0 bytes in 0 blocks
> ==29057== indirectly lost: 0 bytes in 0 blocks
> ==29057== possibly lost: 0 bytes in 0 blocks
> ==29057== still reachable: 560,151 bytes in 383 blocks
> ==29057== suppressed: 0 bytes in 0 blocks
> ==29057== Rerun with --leak-check=full to see details of leaked memory
> ==29057==
> ==29057== For counts of detected and suppressed errors, rerun with: -v
> ==29057== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 8 from 6)
>
>
>
>
> Thanks,
> Sepideh
>
>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
> https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/~mk51/>
>
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/~mk51/>
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