[Nek5000-users] Nek5000-users Digest, Vol 35, Issue 10

nek5000-users at lists.mcs.anl.gov nek5000-users at lists.mcs.anl.gov
Thu Jan 12 15:40:57 CST 2012


Hi Katie;

The AMG scheme is working properly now. Thanks very much for your help.

Best regards
Azad


Quoting nek5000-users-request at lists.mcs.anl.gov:

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> Today's Topics:
>
>    1. Re: Nek5000-users Digest, Vol 35, Issue 9
>       (nek5000-users at lists.mcs.anl.gov)
>    2. Re: Nek5000-users Digest, Vol 35, Issue 9
>       (nek5000-users at lists.mcs.anl.gov)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 12 Jan 2012 21:34:35 +0100
> From: nek5000-users at lists.mcs.anl.gov
> Subject: Re: [Nek5000-users] Nek5000-users Digest, Vol 35, Issue 9
> To: nek5000-users at lists.mcs.anl.gov
> Message-ID: <20120112213435.25972q7ffsnuvb2z at www.mech.kth.se>
> Content-Type: text/plain;	charset=ISO-8859-1;	DelSp="Yes";
> 	format="flowed"
>
>
> Hi Katie;
>
> Thanks for updating the page. I did exactly the same as it's suggested
> in the updated page. After ./run of the script in amg_matlab I got
> this error:
>
> #########################################################
> Computing Lagrange multiplier governing matrix skeleton ... nnz = 25.
> Computing Lagrange multiplier governing matrix (C code) ... done.
> CG to obtain Lagrange multipliers ... 1 iterations.
> Computing interpolation weights (C code) ... done.
> Sparsifying R_f A P: compression = 0
> simple_sparsify: nnzs 4/4 (1)
> Level 6, dim(A) = 2
> Computing S = I - D^{-1/2} A D^{-1/2} ... done, nnz(S) = 2.
> Running coarsening heuristic ...
>    ratio = 0, n = 0, max Gershgorin radius = 1
>    ratio = 0.5, n = 1, max Gershgorin radius = 0
> connectivity = ??? Error using ==> fprintf
> Function is not defined for sparse inputs.
>
> Error in ==> coarse_par at 37
>          fprintf(1,'%g\n',max(lanczos(sparse(D*S*D))));
>
> Error in ==> amg_setup at 30
>                  [C F] = coarse_par(A,tolc);
>
> Error in ==> go at 20
> data = amg_setup(A, full(0*A(:,1)+1),ctol, tol, stol, wtol);
> ############################################################
>
> I tried it for turbChannel test case as well as some other simplified
> test cases. I have got the same errors.
>
>
> Regards
> Azad
>
>
>
> Quoting nek5000-users-request at lists.mcs.anl.gov:
>
>> Send Nek5000-users mailing list submissions to
>> 	nek5000-users at lists.mcs.anl.gov
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>> or, via email, send a message with subject or body 'help' to
>> 	nek5000-users-request at lists.mcs.anl.gov
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>> than "Re: Contents of Nek5000-users digest..."
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>> Today's Topics:
>>
>>    1. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.gov)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Thu, 12 Jan 2012 14:09:12 -0600
>> From: nek5000-users at lists.mcs.anl.gov
>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>> To: nek5000-users at lists.mcs.anl.gov
>> Message-ID:
>> 	<CAFTrYW+ctDhLYVdJCh8mOpA6bB7j361o=vn7WaATYkEDCifYsw at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Hi Azad,
>>
>> Earlier you had asked if a step was missing in the wiki with regards to the
>> amg files/scripts.  The has just been updated.
>>
>> Can you tell me exactly what you did to run the turbChannel test?  And what
>> output you had from the amg_matlab/run step?
>>
>> thanks,
>> Katie
>>
>> On Thu, Jan 12, 2012 at 1:38 PM, <nek5000-users at lists.mcs.anl.gov> wrote:
>>
>>> Hi Stefan;
>>>
>>> Unfortunately it does not work. first of all, ./run in amg_matlab does not
>>> produce anything (latest version). Using my version of the files (running
>>> turbChannel), the simulation crashed giving me this error:
>>>
>>> ##############################**#################
>>> AMG  level 8: 3 iterations with rho = 0.680429
>>> AMG  level 9: 2 iterations with rho = 0.560188
>>> AMG: 144540 rows
>>> AMG: reading through row 1200, pass 1/121
>>> ERROR (proc 0000,
>>> /scratch/azad/codes/late/nek5_**svn/trunk/nek/jl/amg.c:875):
>>> AMG: data
>>> has more rows than given problem
>>>
>>> call exitt: dying ...
>>> ##############################**#################
>>>
>>> Regards
>>> Azad
>>>
>>> Quoting
>>> nek5000-users-request at lists.**mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>> :
>>>
>>>  Send Nek5000-users mailing list submissions to
>>>>        nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>
>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>
>>>> https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>> or, via email, send a message with subject or body 'help' to
>>>>
>>>> nek5000-users-request at lists.**mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>>
>>>> You can reach the person managing the list at
>>>>
>>>> nek5000-users-owner at lists.mcs.**anl.gov<nek5000-users-owner at lists.mcs.anl.gov>
>>>>
>>>> When replying, please edit your Subject line so it is more specific
>>>> than "Re: Contents of Nek5000-users digest..."
>>>>
>>>>
>>>> Today's Topics:
>>>>
>>>>   1. Re: run-time hang up in gs_setup
>>>> (nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>> )
>>>>
>>>>
>>>> ------------------------------**------------------------------**
>>>> ----------
>>>>
>>>> Message: 1
>>>> Date: Thu, 12 Jan 2012 18:09:48 +0100
>>>>
>>>> From: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>> To: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>>> Message-ID:
>>>>        <CAGTrLsaGQkuowxvfpK3AxvCtgCEk**as9YBJkX024qF2Sh7RcmdA at mail.**
>>>> gmail.com<CAGTrLsaGQkuowxvfpK3AxvCtgCEkas9YBJkX024qF2Sh7RcmdA at mail.gmail.com>
>>>> >
>>>>
>>>> Content-Type: text/plain; charset=ISO-8859-1
>>>>
>>>> Hi Azad,
>>>>
>>>> can you try to run the turbChannel example using AMG and the latest
>>>> version of the repo. Let me know if this works for you.
>>>>
>>>> Stefan
>>>>
>>>> On 1/11/12,
>>>> nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>> <nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>>
>>>> wrote:
>>>>
>>>>> Dear Stefan and Aleks;
>>>>>
>>>>> Thanks for updating the wiki webpage regarding the AMG, although, I
>>>>> persume there must be another step also there exist, namely: copy the
>>>>> generated files from the amg_matlb to the running directory? (Or they
>>>>> should be remained there and one puts the generated .dat files after
>>>>> running the 3rd step?). By the way non of the versions I tried working
>>>>> (even 707!) despite the fact that I had a range of matlab versions
>>>>> tried. Hanging with the old version I had I compiled again and have
>>>>> got the four files which was rather fast (with the message at the end:
>>>>> Error contraction factor: 0.47...) I used them and every time during
>>>>> the run-time it crashed simply:
>>>>> ##############################**##############################**
>>>>> ###############
>>>>> AMG: reading through row 144540, pass 121/121
>>>>> AMG:   reading 0.071106 MB of W
>>>>> AMG:   reading 0.115601 MB of AfP
>>>>> AMG:   reading 0.132477 MB of Aff
>>>>> AMG level 1 F-vars: 440159
>>>>> AMG level 2 F-vars: 55146
>>>>> AMG level 3 F-vars: 28480
>>>>> AMG level 4 F-vars: 17051
>>>>> AMG level 5 F-vars: 7524
>>>>> AMG level 6 F-vars: 5711
>>>>> AMG level 7 F-vars: 5763
>>>>> AMG level 8 F-vars: 28583
>>>>> AMG level 9 F-vars: 5380
>>>>> AMG level 10 F-vars: 5737
>>>>> Application 731033 exit codes: 139
>>>>> Application 731033 exit signals: Killed
>>>>> Application 731033 resources: utime ~417s, stime ~3s
>>>>> ##############################**##############################**
>>>>> ##############
>>>>>
>>>>> Can you help me with that cause I believe this case still doable with
>>>>> correct AMG scheme.
>>>>>
>>>>> Many thanks
>>>>> Azad
>>>>>
>>>>>
>>>>>
>>>>>> Hi Azad,
>>>>>>
>>>>>> I believe old AMG files should work up to and including revision 707
>>>>>> in case >you want to check AMG quickly.
>>>>>>
>>>>>> Best.
>>>>>> Aleks
>>>>>>
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: nek5000-users at lists.mcs.anl.gov
>>>>>> To: nek5000-users at lists.mcs.anl.gov
>>>>>> Sent: Tuesday, January 10, 2012 10:58:47 AM
>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>>
>>>>>> Hi Azad,
>>>>>>
>>>>>> your choice of lx1=8 is fine (it's our preferred sweet spot). If you
>>>>>> have a large element count (say > 300'000) the factorization in the
>>>>>> XXt setup phase may take hours. I guess that's why it looks like it's
>>>>>> hanging. Again, there is a known bug which looks the same. So can't
>>>>>> tell exactly what's causing your problem.
>>>>>>
>>>>>> I just updated the Wiki: https://nek5000.mcs.anl.gov/**
>>>>>> index.php/Amg_matlab <https://nek5000.mcs.anl.gov/index.php/Amg_matlab>
>>>>>>
>>>>>> Can you verify that it still fails.
>>>>>>
>>>>>> -Stefan
>>>>>>
>>>>>> Quoting
>>>>>> nek5000-users-request at lists.**mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>>>> :
>>>>>>
>>>>>> Send Nek5000-users mailing list submissions to
>>>>>>         
>>>>>> nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>>
>>>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>>>
>>>>>> https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>> or, via email, send a message with subject or body 'help' to
>>>>>>
>>>>>> nek5000-users-request at lists.**mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>>>>
>>>>>> You can reach the person managing the list at
>>>>>>
>>>>>> nek5000-users-owner at lists.mcs.**anl.gov<nek5000-users-owner at lists.mcs.anl.gov>
>>>>>>
>>>>>> When replying, please edit your Subject line so it is more specific
>>>>>> than "Re: Contents of Nek5000-users digest..."
>>>>>>
>>>>>>
>>>>>> Today's Topics:
>>>>>>
>>>>>>   1. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.**
>>>>>> gov <nek5000-users at lists.mcs.anl.gov>)
>>>>>>   2. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.**
>>>>>> gov <nek5000-users at lists.mcs.anl.gov>)
>>>>>>   3. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.**
>>>>>> gov <nek5000-users at lists.mcs.anl.gov>)
>>>>>>
>>>>>>
>>>>>> ------------------------------**------------------------------**
>>>>>> ----------
>>>>>>
>>>>>> Message: 1
>>>>>> Date: Tue, 10 Jan 2012 06:01:29 -0600 (CST)
>>>>>> From: nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>> To: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>>>>> Message-ID:
>>>>>> <Pine.LNX.4.64.1201100557250.**6026 at v8.mcs.anl.gov<Pine.LNX.4.64.1201100557250.6026 at v8.mcs.anl.gov>
>>>>>> >
>>>>>> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>>>>>>
>>>>>>
>>>>>> Hi Azad,
>>>>>>
>>>>>> You are in record-setting territory for element counts! :)
>>>>>>
>>>>>> Are you using the amg-based coarse-grid solver?
>>>>>> It is certain that you will need to do this (and,
>>>>>> therefore, you will need matlab to process the AMG
>>>>>> operators).   There is some discussion of the steps
>>>>>> on the wiki page.  We can walk you through this process
>>>>>> if you have any questions.
>>>>>>
>>>>>> What value of lx1 are you using?
>>>>>>
>>>>>> I would recommend fewer elements and a higher value of lx1.
>>>>>> I think it will be easier to manage the data, etc.
>>>>>>
>>>>>> Paul
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Tue, 10 Jan 2012,
>>>>>> nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>wrote:
>>>>>>
>>>>>>  Dear NEKs;
>>>>>>>
>>>>>>> I am trying to run a simulation of a turbulent flow in a straight pipe
>>>>>>> in high Reynolds number (Re_tau = 1000). After generating the grid with
>>>>>>> PRENEK and extrude it using n2to3, the mesh ended up with 4,495,920
>>>>>>> elements. It compiled properly; however, trying to run it, hanged up in
>>>>>>> the last stage:
>>>>>>> ##############################**##############################**
>>>>>>> ############
>>>>>>>
>>>>>>> verify mesh topology
>>>>>>>  -1.000000000000000         1.000000000000000       Xrange
>>>>>>>  -1.000000000000000         1.000000000000000       Yrange
>>>>>>>   0.000000000000000         25.00000000000000       Zrange
>>>>>>> done :: verify mesh topology
>>>>>>>
>>>>>>>  E-solver strategy:  1 itr
>>>>>>> mg_nx:            1            3
>>>>>>> mg_ny:            1            3
>>>>>>> mg_nz:            1            3
>>>>>>> call usrsetvert
>>>>>>> done :: usrsetvert
>>>>>>>
>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>  pairwise times (avg, min, max): 0.000241442 0.00019722 0.000265908
>>>>>>>  crystal router                : 0.000458177 0.000445795 0.000471807
>>>>>>>  used all_to_all method: pairwise
>>>>>>>  setupds time 5.6048E-02 seconds   1  2     4565612     4495920
>>>>>>>  setvert3d:   4    86046564   122013924    86046564    86046564
>>>>>>> call usrsetvert
>>>>>>> done :: usrsetvert
>>>>>>>
>>>>>>> gs_setup: 8041169 unique labels shared
>>>>>>>  pairwise times (avg, min, max): 0.00050716 0.000427103 0.00056479
>>>>>>>  crystal router                : 0.0040165 0.00392921 0.00411811
>>>>>>>  used all_to_all method: pairwise
>>>>>>>  setupds time 1.0465E+00 seconds   2 4 86046564     4495920
>>>>>>> setup h1 coarse grid, nx_crs=            2
>>>>>>> call usrsetvert
>>>>>>> done :: usrsetvert
>>>>>>>
>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>  pairwise times (avg, min, max): 0.000233683 0.000197816 0.00024941
>>>>>>>  crystal router                : 0.000466869 0.00045588 0.000478101
>>>>>>>  used all_to_all method: pairwise
>>>>>>> ##############################**##############################**
>>>>>>> ############
>>>>>>>
>>>>>>>
>>>>>>> I was wondering if you could help me with that. I attached the run
>>>>>>> logfile and also genmap.out.
>>>>>>>
>>>>>>> Many thanks
>>>>>>> Azad
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> ------------------------------
>>>>>>
>>>>>> Message: 2
>>>>>> Date: Tue, 10 Jan 2012 13:35:22 +0100
>>>>>> From: nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>> To: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>>>>> Message-ID:
>>>>>>        <CAGTrLsaexkteQN1Y1NQ3FYz7Q2ab**b5YSLzOv+zeTwdvYXpD3Fw at mail.**
>>>>>> gmail.com<CAGTrLsaexkteQN1Y1NQ3FYz7Q2abb5YSLzOv%2BzeTwdvYXpD3Fw at mail.gmail.com>
>>>>>> >
>>>>>> Content-Type: text/plain; charset=ISO-8859-1
>>>>>>
>>>>>> Hi Azad,
>>>>>>
>>>>>> We have seen similar situations. I think this has to do with a known
>>>>>> bug. Unfortunately this bug is hard to reproduce and we haven't
>>>>>> managed to fix it yet.
>>>>>>
>>>>>> -Stefan
>>>>>>
>>>>>> On 1/10/12,
>>>>>> nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>> <nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>> wrote:
>>>>>>
>>>>>>>
>>>>>>> Hi Azad,
>>>>>>>
>>>>>>> You are in record-setting territory for element counts! :)
>>>>>>>
>>>>>>> Are you using the amg-based coarse-grid solver?
>>>>>>> It is certain that you will need to do this (and,
>>>>>>> therefore, you will need matlab to process the AMG
>>>>>>> operators).   There is some discussion of the steps
>>>>>>> on the wiki page.  We can walk you through this process
>>>>>>> if you have any questions.
>>>>>>>
>>>>>>> What value of lx1 are you using?
>>>>>>>
>>>>>>> I would recommend fewer elements and a higher value of lx1.
>>>>>>> I think it will be easier to manage the data, etc.
>>>>>>>
>>>>>>> Paul
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Tue, 10 Jan 2012,
>>>>>>> nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>wrote:
>>>>>>>
>>>>>>>  Dear NEKs;
>>>>>>>>
>>>>>>>> I am trying to run a simulation of a turbulent flow in a straight pipe
>>>>>>>> in high Reynolds number (Re_tau = 1000). After generating the grid
>>>>>>>> with
>>>>>>>> PRENEK and extrude it using n2to3, the mesh ended up with 4,495,920
>>>>>>>> elements. It compiled properly; however, trying to run it, hanged up
>>>>>>>> in
>>>>>>>> the last stage:
>>>>>>>> ##############################**##############################**
>>>>>>>> ############
>>>>>>>>
>>>>>>>> verify mesh topology
>>>>>>>>  -1.000000000000000         1.000000000000000       Xrange
>>>>>>>>  -1.000000000000000         1.000000000000000       Yrange
>>>>>>>>   0.000000000000000         25.00000000000000       Zrange
>>>>>>>> done :: verify mesh topology
>>>>>>>>
>>>>>>>>  E-solver strategy:  1 itr
>>>>>>>> mg_nx:            1            3
>>>>>>>> mg_ny:            1            3
>>>>>>>> mg_nz:            1            3
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.000241442 0.00019722 0.000265908
>>>>>>>>  crystal router                : 0.000458177 0.000445795 0.000471807
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>  setupds time 5.6048E-02 seconds   1  2     4565612     4495920
>>>>>>>>  setvert3d:   4    86046564   122013924    86046564    86046564
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 8041169 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.00050716 0.000427103 0.00056479
>>>>>>>>  crystal router                : 0.0040165 0.00392921 0.00411811
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>  setupds time 1.0465E+00 seconds   2 4 86046564     4495920
>>>>>>>> setup h1 coarse grid, nx_crs=            2
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.000233683 0.000197816 0.00024941
>>>>>>>>  crystal router                : 0.000466869 0.00045588 0.000478101
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>> ##############################**##############################**
>>>>>>>> ############
>>>>>>>>
>>>>>>>>
>>>>>>>> I was wondering if you could help me with that. I attached the run
>>>>>>>> logfile and also genmap.out.
>>>>>>>>
>>>>>>>> Many thanks
>>>>>>>> Azad
>>>>>>>>
>>>>>>>>  ______________________________**_________________
>>>>>>> Nek5000-users mailing list
>>>>>>> Nek5000-users at lists.mcs.anl.**gov <Nek5000-users at lists.mcs.anl.gov>
>>>>>>> https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> ------------------------------
>>>>>>
>>>>>> Message: 3
>>>>>> Date: Tue, 10 Jan 2012 17:58:47 +0100
>>>>>> From: nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>> To: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>>>>> Message-ID:
>>>>>> <1326214727.2600.282.camel@**damavand.mech.kth.se<1326214727.2600.282.camel at damavand.mech.kth.se>
>>>>>> >
>>>>>> Content-Type: text/plain; charset="UTF-8"
>>>>>>
>>>>>> Dear Paul and Stefan;
>>>>>>
>>>>>> Thanks very much for looking into it. I use polynomial order 7th
>>>>>> (lx1=8). For the coarse-grid solver I actually used XXt. I also tried to
>>>>>> use AMG, but unfortunately neither v619 nor the latest version could
>>>>>> have compiled its matlab files and always gives me this error (in
>>>>>> matlab/R2011a):
>>>>>> ##############################**################
>>>>>> ...
>>>>>> sparsification tolerance [1e-4]: stol = 0.0001
>>>>>>
>>>>>> ------------------------------**------------------------------**
>>>>>> ------------
>>>>>>       Segmentation violation detected at Tue Jan 10 15:56:46 2012
>>>>>> ------------------------------**------------------------------**
>>>>>> ------------
>>>>>> ....
>>>>>> Abnormal termination:
>>>>>> Segmentation violation
>>>>>> ....
>>>>>> ##############################**###############
>>>>>> I have been in the web page: "amg_matlab Matlab based tool to generate
>>>>>> AMG solver inputfiles" (http://nek5000.mcs.anl.gov/**
>>>>>> index.php/Amg_matlab <http://nek5000.mcs.anl.gov/index.php/Amg_matlab>)
>>>>>> which gives me an empty link.
>>>>>>
>>>>>> I had an old version of the .dat files needed to run AMG, which I tried
>>>>>> those as (amg_Aff.dat, amgdmp_i.dat, amg.dat, amg_AfP.dat, amgdmp_p.dat,
>>>>>> amgdmp_j.dat, amg_W.dat) and I have got this error:
>>>>>>
>>>>>> ##############################**##############
>>>>>> ...
>>>>>> AMG: reading through row 142800, pass 119/121
>>>>>> AMG: reading through row 144000, pass 120/121
>>>>>> AMG: reading through row 144540, pass 121/121
>>>>>> ERROR (proc
>>>>>> 0000,
>>>>>> /afs/pdc.kth.se/home/a/**anoorani/codes/latest_nek/**
>>>>>> nek5_svn/trunk/nek/jl/amg.c:**468<http://pdc.kth.se/home/a/anoorani/codes/latest_nek/nek5_svn/trunk/nek/jl/amg.c:468>
>>>>>> ):
>>>>>> AMG: missing data for some
>>>>>> rows
>>>>>>
>>>>>> call exitt: dying ...
>>>>>> ##############################**##############
>>>>>>
>>>>>> I think AMG could be a possibility to overcome this problem, though I
>>>>>> could not manage to get a run with that one. I look into the problem
>>>>>> with higher polynomial order to see if it reduces the number of elements
>>>>>> dramatically, or at least resolve this issue.
>>>>>>
>>>>>> Best regards
>>>>>> Azad
>>>>>>
>>>>>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%**%%%%%%%%%%%%%%%%%%%%%%%%%
>>>>>>
>>>>>>> Hi Azad,
>>>>>>>
>>>>>>> We have seen similar situations. I think this has to do with a known
>>>>>>> bug. Unfortunately this bug is hard to reproduce and we haven't
>>>>>>> managed to fix it yet.
>>>>>>>
>>>>>>> -Stefan
>>>>>>>
>>>>>>> On 1/10/12, nek5000-users at lists.mcs.anl.gov
>>>>>>> <nek5000-users at lists.mcs.anl.gov> wrote:
>>>>>>>
>>>>>>>
>>>>>>> Hi Azad,
>>>>>>>
>>>>>>> You are in record-setting territory for element counts! :)
>>>>>>>
>>>>>>> Are you using the amg-based coarse-grid solver?
>>>>>>> It is certain that you will need to do this (and,
>>>>>>> therefore, you will need matlab to process the AMG
>>>>>>> operators).   There is some discussion of the steps
>>>>>>> on the wiki page.  We can walk you through this process
>>>>>>> if you have any questions.
>>>>>>>
>>>>>>> What value of lx1 are you using?
>>>>>>>
>>>>>>> I would recommend fewer elements and a higher value of lx1.
>>>>>>> I think it will be easier to manage the data, etc.
>>>>>>>
>>>>>>> Paul
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Tue, 10 Jan 2012, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>
>>>>>>> Dear NEKs;
>>>>>>>
>>>>>>> I am trying to run a simulation of a turbulent flow in a straight pipe
>>>>>>> in high Reynolds number (Re_tau = 1000). After generating the grid with
>>>>>>> PRENEK and extrude it using n2to3, the mesh ended up with 4,495,920
>>>>>>> elements. It compiled properly; however, trying to run it, hanged up in
>>>>>>> the last stage:
>>>>>>> ##############################**##############################**
>>>>>>> ############
>>>>>>>
>>>>>>> verify mesh topology
>>>>>>>  -1.000000000000000         1.000000000000000       Xrange
>>>>>>>  -1.000000000000000         1.000000000000000       Yrange
>>>>>>>   0.000000000000000         25.00000000000000       Zrange
>>>>>>> done :: verify mesh topology
>>>>>>>
>>>>>>>  E-solver strategy:  1 itr
>>>>>>> mg_nx:            1            3
>>>>>>> mg_ny:            1            3
>>>>>>> mg_nz:            1            3
>>>>>>> call usrsetvert
>>>>>>> done :: usrsetvert
>>>>>>>
>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>  pairwise times (avg, min, max): 0.000241442 0.00019722 0.000265908
>>>>>>>  crystal router                : 0.000458177 0.000445795 0.000471807
>>>>>>>  used all_to_all method: pairwise
>>>>>>>  setupds time 5.6048E-02 seconds   1  2     4565612     4495920
>>>>>>>  setvert3d:   4    86046564   122013924    86046564    86046564
>>>>>>> call usrsetvert
>>>>>>> done :: usrsetvert
>>>>>>>
>>>>>>> gs_setup: 8041169 unique labels shared
>>>>>>>  pairwise times (avg, min, max): 0.00050716 0.000427103 0.00056479
>>>>>>>  crystal router                : 0.0040165 0.00392921 0.00411811
>>>>>>>  used all_to_all method: pairwise
>>>>>>>  setupds time 1.0465E+00 seconds   2 4 86046564     4495920
>>>>>>> setup h1 coarse grid, nx_crs=            2
>>>>>>> call usrsetvert
>>>>>>> done :: usrsetvert
>>>>>>>
>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>  pairwise times (avg, min, max): 0.000233683 0.000197816 0.00024941
>>>>>>>  crystal router                : 0.000466869 0.00045588 0.000478101
>>>>>>>  used all_to_all method: pairwise
>>>>>>> ##############################**##############################**
>>>>>>> ############
>>>>>>>
>>>>>>>
>>>>>>> I was wondering if you could help me with that. I attached the run
>>>>>>> logfile and also genmap.out.
>>>>>>>
>>>>>>> Many thanks
>>>>>>> Azad
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> ------------------------------
>>>>>>
>>>>>> ______________________________**_________________
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>>>>>> https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>>
>>>>>>
>>>>>> End of Nek5000-users Digest, Vol 35, Issue 5
>>>>>> **********************************************
>>>>>>
>>>>>>
>>>>>
>>>>>
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>>>>>
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>>>>
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> ------------------------------
>
> Message: 2
> Date: Thu, 12 Jan 2012 15:12:23 -0600
> From: nek5000-users at lists.mcs.anl.gov
> Subject: Re: [Nek5000-users] Nek5000-users Digest, Vol 35, Issue 9
> To: nek5000-users at lists.mcs.anl.gov
> Message-ID:
> 	<CAFTrYW+X0-OzBXRySZBViYG_FcWcm0neddJV1MJ9rbyxj+6GSA at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Azad,
>
> This error means that your version of matlab doesn't like the fprint() in
> coarse_par.f, line 37.
>
> Since this is just a print statement, you can comment this out by adding %
> in front of line 37.  So it should look like:
>
> %      fprintf(1,'%g\n',max(lanczos(sparse(D*S*D))));
>
> Then this should work, at least for turbChannel.
>
> good luck,
> Katie
>
> On Thu, Jan 12, 2012 at 2:34 PM, <nek5000-users at lists.mcs.anl.gov> wrote:
>
>>
>> Hi Katie;
>>
>> Thanks for updating the page. I did exactly the same as it's suggested in
>> the updated page. After ./run of the script in amg_matlab I got this error:
>>
>> ##############################**###########################
>> Computing Lagrange multiplier governing matrix skeleton ... nnz = 25.
>> Computing Lagrange multiplier governing matrix (C code) ... done.
>> CG to obtain Lagrange multipliers ... 1 iterations.
>> Computing interpolation weights (C code) ... done.
>> Sparsifying R_f A P: compression = 0
>> simple_sparsify: nnzs 4/4 (1)
>> Level 6, dim(A) = 2
>> Computing S = I - D^{-1/2} A D^{-1/2} ... done, nnz(S) = 2.
>> Running coarsening heuristic ...
>>  ratio = 0, n = 0, max Gershgorin radius = 1
>>  ratio = 0.5, n = 1, max Gershgorin radius = 0
>> connectivity = ??? Error using ==> fprintf
>> Function is not defined for sparse inputs.
>>
>> Error in ==> coarse_par at 37
>>         fprintf(1,'%g\n',max(lanczos(sparse(D*S*D))));
>>
>> Error in ==> amg_setup at 30
>>                [C F] = coarse_par(A,tolc);
>>
>> Error in ==> go at 20
>> data = amg_setup(A, full(0*A(:,1)+1),ctol, tol, stol, wtol);
>> ##############################**##############################
>>
>> I tried it for turbChannel test case as well as some other simplified test
>> cases. I have got the same errors.
>>
>>
>> Regards
>> Azad
>>
>>
>>
>> Quoting  
>> nek5000-users-request at lists.**mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>> :
>>
>>  Send Nek5000-users mailing list submissions to
>>>        nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>
>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>         
>>> https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>> or, via email, send a message with subject or body 'help' to
>>>         
>>> nek5000-users-request at lists.**mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>
>>> You can reach the person managing the list at
>>>         
>>> nek5000-users-owner at lists.mcs.**anl.gov<nek5000-users-owner at lists.mcs.anl.gov>
>>>
>>> When replying, please edit your Subject line so it is more specific
>>> than "Re: Contents of Nek5000-users digest..."
>>>
>>>
>>> Today's Topics:
>>>
>>>   1. Re: run-time hang up in gs_setup  
>>> (nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>> )
>>>
>>>
>>> ------------------------------**------------------------------**
>>> ----------
>>>
>>> Message: 1
>>> Date: Thu, 12 Jan 2012 14:09:12 -0600
>>> From: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>> To: nek5000-users at lists.mcs.anl.**gov <nek5000-users at lists.mcs.anl.gov>
>>> Message-ID:
>>>        <CAFTrYW+**ctDhLYVdJCh8mOpA6bB7j361o=vn7W**
>>> aATYkEDCifYsw at mail.gmail.com <vn7WaATYkEDCifYsw at mail.gmail.com>>
>>> Content-Type: text/plain; charset="iso-8859-1"
>>>
>>> Hi Azad,
>>>
>>> Earlier you had asked if a step was missing in the wiki with regards to
>>> the
>>> amg files/scripts.  The has just been updated.
>>>
>>> Can you tell me exactly what you did to run the turbChannel test?  And
>>> what
>>> output you had from the amg_matlab/run step?
>>>
>>> thanks,
>>> Katie
>>>
>>> On Thu, Jan 12, 2012 at 1:38 PM,  
>>> <nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>>
>>> wrote:
>>>
>>>  Hi Stefan;
>>>>
>>>> Unfortunately it does not work. first of all, ./run in amg_matlab does
>>>> not
>>>> produce anything (latest version). Using my version of the files (running
>>>> turbChannel), the simulation crashed giving me this error:
>>>>
>>>> ##############################****#################
>>>> AMG  level 8: 3 iterations with rho = 0.680429
>>>> AMG  level 9: 2 iterations with rho = 0.560188
>>>> AMG: 144540 rows
>>>> AMG: reading through row 1200, pass 1/121
>>>> ERROR (proc 0000, /scratch/azad/codes/late/nek5_**
>>>> **svn/trunk/nek/jl/amg.c:875):
>>>> AMG: data
>>>> has more rows than given problem
>>>>
>>>> call exitt: dying ...
>>>> ##############################****#################
>>>>
>>>> Regards
>>>> Azad
>>>>
>>>> Quoting nek5000-users-request at lists.****mcs.anl.gov <http://mcs.anl.gov>
>>>> <nek5000-users-**request at lists.mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>> >
>>>> :
>>>>
>>>>  Send Nek5000-users mailing list submissions to
>>>>
>>>>>       nek5000-users at lists.mcs.anl.****gov<nek5000-users at lists.mcs.**
>>>>> anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>
>>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>>        
>>>>> https://lists.mcs.anl.gov/****mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users>
>>>>> **<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>> **>
>>>>> or, via email, send a message with subject or body 'help' to
>>>>>       nek5000-users-request at lists.****mcs.anl.gov <http://mcs.anl.gov><
>>>>> nek5000-users-**request at lists.mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>>> >
>>>>>
>>>>> You can reach the person managing the list at
>>>>>       nek5000-users-owner at lists.mcs.****anl.gov<nek5000-users-owner@**
>>>>> lists.mcs.anl.gov <nek5000-users-owner at lists.mcs.anl.gov>>
>>>>>
>>>>> When replying, please edit your Subject line so it is more specific
>>>>> than "Re: Contents of Nek5000-users digest..."
>>>>>
>>>>>
>>>>> Today's Topics:
>>>>>
>>>>>  1. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.***
>>>>> *gov<nek5000-users at lists.mcs.**anl.gov<nek5000-users at lists.mcs.anl.gov>
>>>>> >
>>>>> )
>>>>>
>>>>>
>>>>> ------------------------------****----------------------------**--**
>>>>> ----------
>>>>>
>>>>> Message: 1
>>>>> Date: Thu, 12 Jan 2012 18:09:48 +0100
>>>>>
>>>>> From: nek5000-users at lists.mcs.anl.****gov <nek5000-users at lists.mcs.anl.
>>>>> **gov <nek5000-users at lists.mcs.anl.gov>>
>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>> To: nek5000-users at lists.mcs.anl.****gov <nek5000-users at lists.mcs.anl.**
>>>>> gov <nek5000-users at lists.mcs.anl.gov>>
>>>>> Message-ID:
>>>>>       <**CAGTrLsaGQkuowxvfpK3AxvCtgCEk****as9YBJkX024qF2Sh7RcmdA at mail.*
>>>>> ***
>>>>> gmail.com<CAGTrLsaGQkuowxvfpK3**AxvCtgCEkas9YBJkX024qF2Sh7Rcmd**
>>>>> A at mail.gmail.com<CAGTrLsaGQkuowxvfpK3AxvCtgCEkas9YBJkX024qF2Sh7RcmdA at mail.gmail.com>
>>>>> >
>>>>> >
>>>>>
>>>>> Content-Type: text/plain; charset=ISO-8859-1
>>>>>
>>>>> Hi Azad,
>>>>>
>>>>> can you try to run the turbChannel example using AMG and the latest
>>>>> version of the repo. Let me know if this works for you.
>>>>>
>>>>> Stefan
>>>>>
>>>>> On 1/11/12, nek5000-users at lists.mcs.anl.****gov<
>>>>> nek5000-users at lists.mcs.**anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>> <nek5000-users at lists.mcs.anl.****gov  
>>>>> <nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>> >>
>>>>> wrote:
>>>>>
>>>>>  Dear Stefan and Aleks;
>>>>>>
>>>>>> Thanks for updating the wiki webpage regarding the AMG, although, I
>>>>>> persume there must be another step also there exist, namely: copy the
>>>>>> generated files from the amg_matlb to the running directory? (Or they
>>>>>> should be remained there and one puts the generated .dat files after
>>>>>> running the 3rd step?). By the way non of the versions I tried working
>>>>>> (even 707!) despite the fact that I had a range of matlab versions
>>>>>> tried. Hanging with the old version I had I compiled again and have
>>>>>> got the four files which was rather fast (with the message at the end:
>>>>>> Error contraction factor: 0.47...) I used them and every time during
>>>>>> the run-time it crashed simply:
>>>>>> ##############################****############################**##**
>>>>>> ###############
>>>>>> AMG: reading through row 144540, pass 121/121
>>>>>> AMG:   reading 0.071106 MB of W
>>>>>> AMG:   reading 0.115601 MB of AfP
>>>>>> AMG:   reading 0.132477 MB of Aff
>>>>>> AMG level 1 F-vars: 440159
>>>>>> AMG level 2 F-vars: 55146
>>>>>> AMG level 3 F-vars: 28480
>>>>>> AMG level 4 F-vars: 17051
>>>>>> AMG level 5 F-vars: 7524
>>>>>> AMG level 6 F-vars: 5711
>>>>>> AMG level 7 F-vars: 5763
>>>>>> AMG level 8 F-vars: 28583
>>>>>> AMG level 9 F-vars: 5380
>>>>>> AMG level 10 F-vars: 5737
>>>>>> Application 731033 exit codes: 139
>>>>>> Application 731033 exit signals: Killed
>>>>>> Application 731033 resources: utime ~417s, stime ~3s
>>>>>> ##############################****############################**##**
>>>>>> ##############
>>>>>>
>>>>>> Can you help me with that cause I believe this case still doable with
>>>>>> correct AMG scheme.
>>>>>>
>>>>>> Many thanks
>>>>>> Azad
>>>>>>
>>>>>>
>>>>>>
>>>>>>  Hi Azad,
>>>>>>>
>>>>>>> I believe old AMG files should work up to and including revision 707
>>>>>>> in case >you want to check AMG quickly.
>>>>>>>
>>>>>>> Best.
>>>>>>> Aleks
>>>>>>>
>>>>>>>
>>>>>>> ----- Original Message -----
>>>>>>> From: nek5000-users at lists.mcs.anl.gov
>>>>>>> To: nek5000-users at lists.mcs.anl.gov
>>>>>>> Sent: Tuesday, January 10, 2012 10:58:47 AM
>>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>>>
>>>>>>> Hi Azad,
>>>>>>>
>>>>>>> your choice of lx1=8 is fine (it's our preferred sweet spot). If you
>>>>>>> have a large element count (say > 300'000) the factorization in the
>>>>>>> XXt setup phase may take hours. I guess that's why it looks like it's
>>>>>>> hanging. Again, there is a known bug which looks the same. So can't
>>>>>>> tell exactly what's causing your problem.
>>>>>>>
>>>>>>> I just updated the Wiki: https://nek5000.mcs.anl.gov/**
>>>>>>> index.php/Amg_matlab <https://nek5000.mcs.anl.gov/**
>>>>>>> index.php/Amg_matlab<https://nek5000.mcs.anl.gov/index.php/Amg_matlab>
>>>>>>> >
>>>>>>>
>>>>>>> Can you verify that it still fails.
>>>>>>>
>>>>>>> -Stefan
>>>>>>>
>>>>>>> Quoting nek5000-users-request at lists.****mcs.anl.gov<http://mcs.anl.gov>
>>>>>>> <nek5000-users-**request at lists.mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>>>>> >
>>>>>>> :
>>>>>>>
>>>>>>> Send Nek5000-users mailing list submissions to
>>>>>>>       nek5000-users at lists.mcs.anl.****gov<nek5000-users at lists.mcs.**
>>>>>>> anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>>
>>>>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>>>>        
>>>>>>> https://lists.mcs.anl.gov/****mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users>
>>>>>>> **<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>>> **>
>>>>>>> or, via email, send a message with subject or body 'help' to
>>>>>>>       nek5000-users-request at lists.****mcs.anl.gov<http://mcs.anl.gov>
>>>>>>> <nek5000-users-**request at lists.mcs.anl.gov<nek5000-users-request at lists.mcs.anl.gov>
>>>>>>> >
>>>>>>>
>>>>>>> You can reach the person managing the list at
>>>>>>>       nek5000-users-owner at lists.mcs.****anl.gov<nek5000-users-owner@*
>>>>>>> *lists.mcs.anl.gov <nek5000-users-owner at lists.mcs.anl.gov>>
>>>>>>>
>>>>>>> When replying, please edit your Subject line so it is more specific
>>>>>>> than "Re: Contents of Nek5000-users digest..."
>>>>>>>
>>>>>>>
>>>>>>> Today's Topics:
>>>>>>>
>>>>>>>  1. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.***
>>>>>>> *
>>>>>>> gov <nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>>> >)
>>>>>>>  2. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.***
>>>>>>> *
>>>>>>> gov <nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>>> >)
>>>>>>>  3. Re: run-time hang up in gs_setup (nek5000-users at lists.mcs.anl.***
>>>>>>> *
>>>>>>> gov <nek5000-users at lists.mcs.anl.**gov<nek5000-users at lists.mcs.anl.gov>
>>>>>>> >)
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------****----------------------------**--**
>>>>>>> ----------
>>>>>>>
>>>>>>> Message: 1
>>>>>>> Date: Tue, 10 Jan 2012 06:01:29 -0600 (CST)
>>>>>>> From: nek5000-users at lists.mcs.anl.****gov<nek5000-users at lists.mcs.**
>>>>>>> anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>>> To: nek5000-users at lists.mcs.anl.****gov <nek5000-users at lists.mcs.anl.
>>>>>>> **gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> Message-ID: <Pine.LNX.4.64.1201100557250.****6026 at v8.mcs.anl.gov<
>>>>>>> Pine.LNX.**4.64.1201100557250.6026 at v8.**mcs.anl.gov<Pine.LNX.4.64.1201100557250.6026 at v8.mcs.anl.gov>
>>>>>>> >
>>>>>>> >
>>>>>>> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>>>>>>>
>>>>>>>
>>>>>>> Hi Azad,
>>>>>>>
>>>>>>> You are in record-setting territory for element counts! :)
>>>>>>>
>>>>>>> Are you using the amg-based coarse-grid solver?
>>>>>>> It is certain that you will need to do this (and,
>>>>>>> therefore, you will need matlab to process the AMG
>>>>>>> operators).   There is some discussion of the steps
>>>>>>> on the wiki page.  We can walk you through this process
>>>>>>> if you have any questions.
>>>>>>>
>>>>>>> What value of lx1 are you using?
>>>>>>>
>>>>>>> I would recommend fewer elements and a higher value of lx1.
>>>>>>> I think it will be easier to manage the data, etc.
>>>>>>>
>>>>>>> Paul
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Tue, 10 Jan 2012, nek5000-users at lists.mcs.anl.****gov<
>>>>>>> nek5000-users at lists.mcs.**anl.gov <nek5000-users at lists.mcs.anl.gov>
>>>>>>> >wrote:
>>>>>>>
>>>>>>>  Dear NEKs;
>>>>>>>
>>>>>>>>
>>>>>>>> I am trying to run a simulation of a turbulent flow in a straight
>>>>>>>> pipe
>>>>>>>> in high Reynolds number (Re_tau = 1000). After generating the grid
>>>>>>>> with
>>>>>>>> PRENEK and extrude it using n2to3, the mesh ended up with 4,495,920
>>>>>>>> elements. It compiled properly; however, trying to run it, hanged up
>>>>>>>> in
>>>>>>>> the last stage:
>>>>>>>> ##############################****############################**##**
>>>>>>>> ############
>>>>>>>>
>>>>>>>> verify mesh topology
>>>>>>>>  -1.000000000000000         1.000000000000000       Xrange
>>>>>>>>  -1.000000000000000         1.000000000000000       Yrange
>>>>>>>>  0.000000000000000         25.00000000000000       Zrange
>>>>>>>> done :: verify mesh topology
>>>>>>>>
>>>>>>>>  E-solver strategy:  1 itr
>>>>>>>> mg_nx:            1            3
>>>>>>>> mg_ny:            1            3
>>>>>>>> mg_nz:            1            3
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.000241442 0.00019722 0.000265908
>>>>>>>>  crystal router                : 0.000458177 0.000445795 0.000471807
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>  setupds time 5.6048E-02 seconds   1  2     4565612     4495920
>>>>>>>>  setvert3d:   4    86046564   122013924    86046564    86046564
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 8041169 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.00050716 0.000427103 0.00056479
>>>>>>>>  crystal router                : 0.0040165 0.00392921 0.00411811
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>  setupds time 1.0465E+00 seconds   2 4 86046564     4495920
>>>>>>>> setup h1 coarse grid, nx_crs=            2
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.000233683 0.000197816 0.00024941
>>>>>>>>  crystal router                : 0.000466869 0.00045588 0.000478101
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>> ##############################****############################**##**
>>>>>>>> ############
>>>>>>>>
>>>>>>>>
>>>>>>>> I was wondering if you could help me with that. I attached the run
>>>>>>>> logfile and also genmap.out.
>>>>>>>>
>>>>>>>> Many thanks
>>>>>>>> Azad
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> ------------------------------
>>>>>>>
>>>>>>> Message: 2
>>>>>>> Date: Tue, 10 Jan 2012 13:35:22 +0100
>>>>>>> From: nek5000-users at lists.mcs.anl.****gov<nek5000-users at lists.mcs.**
>>>>>>> anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>>> To: nek5000-users at lists.mcs.anl.****gov <nek5000-users at lists.mcs.anl.
>>>>>>> **gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> Message-ID:
>>>>>>>       <**CAGTrLsaexkteQN1Y1NQ3FYz7Q2ab***
>>>>>>> *b5YSLzOv+zeTwdvYXpD3Fw at mail.****
>>>>>>> gmail.com<CAGTrLsaexkteQN1Y1NQ**3FYz7Q2abb5YSLzOv%**
>>>>>>> 2BzeTwdvYXpD3Fw at mail.gmail.com<CAGTrLsaexkteQN1Y1NQ3FYz7Q2abb5YSLzOv%252BzeTwdvYXpD3Fw at mail.gmail.com>
>>>>>>> **>
>>>>>>> >
>>>>>>> Content-Type: text/plain; charset=ISO-8859-1
>>>>>>>
>>>>>>> Hi Azad,
>>>>>>>
>>>>>>> We have seen similar situations. I think this has to do with a known
>>>>>>> bug. Unfortunately this bug is hard to reproduce and we haven't
>>>>>>> managed to fix it yet.
>>>>>>>
>>>>>>> -Stefan
>>>>>>>
>>>>>>> On 1/10/12, nek5000-users at lists.mcs.anl.****gov<
>>>>>>> nek5000-users at lists.mcs.**anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> <nek5000-users at lists.mcs.anl.****gov <nek5000-users at lists.mcs.anl.**
>>>>>>> gov <nek5000-users at lists.mcs.anl.gov>>>
>>>>>>> wrote:
>>>>>>>
>>>>>>>
>>>>>>>> Hi Azad,
>>>>>>>>
>>>>>>>> You are in record-setting territory for element counts! :)
>>>>>>>>
>>>>>>>> Are you using the amg-based coarse-grid solver?
>>>>>>>> It is certain that you will need to do this (and,
>>>>>>>> therefore, you will need matlab to process the AMG
>>>>>>>> operators).   There is some discussion of the steps
>>>>>>>> on the wiki page.  We can walk you through this process
>>>>>>>> if you have any questions.
>>>>>>>>
>>>>>>>> What value of lx1 are you using?
>>>>>>>>
>>>>>>>> I would recommend fewer elements and a higher value of lx1.
>>>>>>>> I think it will be easier to manage the data, etc.
>>>>>>>>
>>>>>>>> Paul
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Tue, 10 Jan 2012, nek5000-users at lists.mcs.anl.****gov<
>>>>>>>> nek5000-users at lists.mcs.**anl.gov <nek5000-users at lists.mcs.anl.gov>
>>>>>>>> >wrote:
>>>>>>>>
>>>>>>>>  Dear NEKs;
>>>>>>>>
>>>>>>>>>
>>>>>>>>> I am trying to run a simulation of a turbulent flow in a straight
>>>>>>>>> pipe
>>>>>>>>> in high Reynolds number (Re_tau = 1000). After generating the grid
>>>>>>>>> with
>>>>>>>>> PRENEK and extrude it using n2to3, the mesh ended up with 4,495,920
>>>>>>>>> elements. It compiled properly; however, trying to run it, hanged up
>>>>>>>>> in
>>>>>>>>> the last stage:
>>>>>>>>> ##############################****############################**
>>>>>>>>> ##**
>>>>>>>>> ############
>>>>>>>>>
>>>>>>>>> verify mesh topology
>>>>>>>>>  -1.000000000000000         1.000000000000000       Xrange
>>>>>>>>>  -1.000000000000000         1.000000000000000       Yrange
>>>>>>>>>  0.000000000000000         25.00000000000000       Zrange
>>>>>>>>> done :: verify mesh topology
>>>>>>>>>
>>>>>>>>>  E-solver strategy:  1 itr
>>>>>>>>> mg_nx:            1            3
>>>>>>>>> mg_ny:            1            3
>>>>>>>>> mg_nz:            1            3
>>>>>>>>> call usrsetvert
>>>>>>>>> done :: usrsetvert
>>>>>>>>>
>>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>>  pairwise times (avg, min, max): 0.000241442 0.00019722 0.000265908
>>>>>>>>>  crystal router                : 0.000458177 0.000445795 0.000471807
>>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>>  setupds time 5.6048E-02 seconds   1  2     4565612     4495920
>>>>>>>>>  setvert3d:   4    86046564   122013924    86046564    86046564
>>>>>>>>> call usrsetvert
>>>>>>>>> done :: usrsetvert
>>>>>>>>>
>>>>>>>>> gs_setup: 8041169 unique labels shared
>>>>>>>>>  pairwise times (avg, min, max): 0.00050716 0.000427103 0.00056479
>>>>>>>>>  crystal router                : 0.0040165 0.00392921 0.00411811
>>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>>  setupds time 1.0465E+00 seconds   2 4 86046564     4495920
>>>>>>>>> setup h1 coarse grid, nx_crs=            2
>>>>>>>>> call usrsetvert
>>>>>>>>> done :: usrsetvert
>>>>>>>>>
>>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>>  pairwise times (avg, min, max): 0.000233683 0.000197816 0.00024941
>>>>>>>>>  crystal router                : 0.000466869 0.00045588 0.000478101
>>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>> ##############################****############################**
>>>>>>>>> ##**
>>>>>>>>> ############
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I was wondering if you could help me with that. I attached the run
>>>>>>>>> logfile and also genmap.out.
>>>>>>>>>
>>>>>>>>> Many thanks
>>>>>>>>> Azad
>>>>>>>>>
>>>>>>>>>  ______________________________****_________________
>>>>>>>>>
>>>>>>>> Nek5000-users mailing list
>>>>>>>> Nek5000-users at lists.mcs.anl.****gov <Nek5000-users at lists.mcs.anl.**
>>>>>>>> gov <Nek5000-users at lists.mcs.anl.gov>>
>>>>>>>> https://lists.mcs.anl.gov/****mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users>
>>>>>>>> **<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>>>> **>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> ------------------------------
>>>>>>>
>>>>>>> Message: 3
>>>>>>> Date: Tue, 10 Jan 2012 17:58:47 +0100
>>>>>>> From: nek5000-users at lists.mcs.anl.****gov<nek5000-users at lists.mcs.**
>>>>>>> anl.gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> Subject: Re: [Nek5000-users] run-time hang up in gs_setup
>>>>>>> To: nek5000-users at lists.mcs.anl.****gov <nek5000-users at lists.mcs.anl.
>>>>>>> **gov <nek5000-users at lists.mcs.anl.gov>>
>>>>>>> Message-ID:  
>>>>>>> <1326214727.2600.282.camel@**d**amavand.mech.kth.se<http://damavand.mech.kth.se>
>>>>>>> <1326214727**.2600.282.camel at damavand.mech.**kth.se<1326214727.2600.282.camel at damavand.mech.kth.se>
>>>>>>> >
>>>>>>> >
>>>>>>> Content-Type: text/plain; charset="UTF-8"
>>>>>>>
>>>>>>> Dear Paul and Stefan;
>>>>>>>
>>>>>>> Thanks very much for looking into it. I use polynomial order 7th
>>>>>>> (lx1=8). For the coarse-grid solver I actually used XXt. I also tried
>>>>>>> to
>>>>>>> use AMG, but unfortunately neither v619 nor the latest version could
>>>>>>> have compiled its matlab files and always gives me this error (in
>>>>>>> matlab/R2011a):
>>>>>>> ##############################****################
>>>>>>> ...
>>>>>>> sparsification tolerance [1e-4]: stol = 0.0001
>>>>>>>
>>>>>>> ------------------------------****----------------------------**--**
>>>>>>> ------------
>>>>>>>      Segmentation violation detected at Tue Jan 10 15:56:46 2012
>>>>>>> ------------------------------****----------------------------**--**
>>>>>>> ------------
>>>>>>> ....
>>>>>>> Abnormal termination:
>>>>>>> Segmentation violation
>>>>>>> ....
>>>>>>> ##############################****###############
>>>>>>> I have been in the web page: "amg_matlab Matlab based tool to generate
>>>>>>> AMG solver inputfiles" (http://nek5000.mcs.anl.gov/**
>>>>>>> index.php/Amg_matlab <http://nek5000.mcs.anl.gov/**
>>>>>>> index.php/Amg_matlab<http://nek5000.mcs.anl.gov/index.php/Amg_matlab>
>>>>>>> >)
>>>>>>> which gives me an empty link.
>>>>>>>
>>>>>>> I had an old version of the .dat files needed to run AMG, which I
>>>>>>> tried
>>>>>>> those as (amg_Aff.dat, amgdmp_i.dat, amg.dat, amg_AfP.dat,
>>>>>>> amgdmp_p.dat,
>>>>>>> amgdmp_j.dat, amg_W.dat) and I have got this error:
>>>>>>>
>>>>>>> ##############################****##############
>>>>>>> ...
>>>>>>> AMG: reading through row 142800, pass 119/121
>>>>>>> AMG: reading through row 144000, pass 120/121
>>>>>>> AMG: reading through row 144540, pass 121/121
>>>>>>> ERROR (proc
>>>>>>> 0000,
>>>>>>> /afs/pdc.kth.se/home/a/****anoorani/codes/latest_nek/**<http://pdc.kth.se/home/a/**anoorani/codes/latest_nek/**>
>>>>>>> nek5_svn/trunk/nek/jl/amg.c:****468<http://pdc.kth.se/home/a/**
>>>>>>> anoorani/codes/latest_nek/**nek5_svn/trunk/nek/jl/amg.c:**468<http://pdc.kth.se/home/a/anoorani/codes/latest_nek/nek5_svn/trunk/nek/jl/amg.c:468>
>>>>>>> >
>>>>>>> ):
>>>>>>> AMG: missing data for some
>>>>>>> rows
>>>>>>>
>>>>>>> call exitt: dying ...
>>>>>>> ##############################****##############
>>>>>>>
>>>>>>> I think AMG could be a possibility to overcome this problem, though I
>>>>>>> could not manage to get a run with that one. I look into the problem
>>>>>>> with higher polynomial order to see if it reduces the number of
>>>>>>> elements
>>>>>>> dramatically, or at least resolve this issue.
>>>>>>>
>>>>>>> Best regards
>>>>>>> Azad
>>>>>>>
>>>>>>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%****%%%%%%%%%%%%%%%%%%%%%%%%%
>>>>>>>
>>>>>>>  Hi Azad,
>>>>>>>>
>>>>>>>> We have seen similar situations. I think this has to do with a known
>>>>>>>> bug. Unfortunately this bug is hard to reproduce and we haven't
>>>>>>>> managed to fix it yet.
>>>>>>>>
>>>>>>>> -Stefan
>>>>>>>>
>>>>>>>> On 1/10/12, nek5000-users at lists.mcs.anl.gov
>>>>>>>> <nek5000-users at lists.mcs.anl.gov> wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>> Hi Azad,
>>>>>>>>
>>>>>>>> You are in record-setting territory for element counts! :)
>>>>>>>>
>>>>>>>> Are you using the amg-based coarse-grid solver?
>>>>>>>> It is certain that you will need to do this (and,
>>>>>>>> therefore, you will need matlab to process the AMG
>>>>>>>> operators).   There is some discussion of the steps
>>>>>>>> on the wiki page.  We can walk you through this process
>>>>>>>> if you have any questions.
>>>>>>>>
>>>>>>>> What value of lx1 are you using?
>>>>>>>>
>>>>>>>> I would recommend fewer elements and a higher value of lx1.
>>>>>>>> I think it will be easier to manage the data, etc.
>>>>>>>>
>>>>>>>> Paul
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Tue, 10 Jan 2012, nek5000-users at lists.mcs.anl.gov wrote:
>>>>>>>>
>>>>>>>> Dear NEKs;
>>>>>>>>
>>>>>>>> I am trying to run a simulation of a turbulent flow in a straight
>>>>>>>> pipe
>>>>>>>> in high Reynolds number (Re_tau = 1000). After generating the grid
>>>>>>>> with
>>>>>>>> PRENEK and extrude it using n2to3, the mesh ended up with 4,495,920
>>>>>>>> elements. It compiled properly; however, trying to run it, hanged up
>>>>>>>> in
>>>>>>>> the last stage:
>>>>>>>> ##############################****############################**##**
>>>>>>>> ############
>>>>>>>>
>>>>>>>> verify mesh topology
>>>>>>>>  -1.000000000000000         1.000000000000000       Xrange
>>>>>>>>  -1.000000000000000         1.000000000000000       Yrange
>>>>>>>>  0.000000000000000         25.00000000000000       Zrange
>>>>>>>> done :: verify mesh topology
>>>>>>>>
>>>>>>>>  E-solver strategy:  1 itr
>>>>>>>> mg_nx:            1            3
>>>>>>>> mg_ny:            1            3
>>>>>>>> mg_nz:            1            3
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.000241442 0.00019722 0.000265908
>>>>>>>>  crystal router                : 0.000458177 0.000445795 0.000471807
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>  setupds time 5.6048E-02 seconds   1  2     4565612     4495920
>>>>>>>>  setvert3d:   4    86046564   122013924    86046564    86046564
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 8041169 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.00050716 0.000427103 0.00056479
>>>>>>>>  crystal router                : 0.0040165 0.00392921 0.00411811
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>>  setupds time 1.0465E+00 seconds   2 4 86046564     4495920
>>>>>>>> setup h1 coarse grid, nx_crs=            2
>>>>>>>> call usrsetvert
>>>>>>>> done :: usrsetvert
>>>>>>>>
>>>>>>>> gs_setup: 866937 unique labels shared
>>>>>>>>  pairwise times (avg, min, max): 0.000233683 0.000197816 0.00024941
>>>>>>>>  crystal router                : 0.000466869 0.00045588 0.000478101
>>>>>>>>  used all_to_all method: pairwise
>>>>>>>> ##############################****############################**##**
>>>>>>>> ############
>>>>>>>>
>>>>>>>>
>>>>>>>> I was wondering if you could help me with that. I attached the run
>>>>>>>> logfile and also genmap.out.
>>>>>>>>
>>>>>>>> Many thanks
>>>>>>>> Azad
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> ------------------------------
>>>>>>>
>>>>>>> ______________________________****_________________
>>>>>>> Nek5000-users mailing list
>>>>>>> Nek5000-users at lists.mcs.anl.****gov <Nek5000-users at lists.mcs.anl.**
>>>>>>> gov <Nek5000-users at lists.mcs.anl.gov>>
>>>>>>> https://lists.mcs.anl.gov/****mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users>
>>>>>>> **<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>>> **>
>>>>>>>
>>>>>>>
>>>>>>> End of Nek5000-users Digest, Vol 35, Issue 5
>>>>>>> ************************************************
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> ------------------------------****----------------------------**
>>>>>> --**----
>>>>>> This message was sent using IMP, the Internet Messaging Program.
>>>>>> ______________________________****_________________
>>>>>> Nek5000-users mailing list
>>>>>> Nek5000-users at lists.mcs.anl.****gov  
>>>>>> <Nek5000-users at lists.mcs.anl.**gov<Nek5000-users at lists.mcs.anl.gov>
>>>>>> >
>>>>>> https://lists.mcs.anl.gov/****mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users>
>>>>>> **<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>>> **>
>>>>>>
>>>>>>
>>>>>>
>>>>> ------------------------------
>>>>>
>>>>> ______________________________****_________________
>>>>> Nek5000-users mailing list
>>>>> Nek5000-users at lists.mcs.anl.****gov  
>>>>> <Nek5000-users at lists.mcs.anl.**gov<Nek5000-users at lists.mcs.anl.gov>
>>>>> >
>>>>> https://lists.mcs.anl.gov/****mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users>
>>>>> **<https://lists.mcs.anl.gov/**mailman/listinfo/nek5000-users<https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users>
>>>>> **>
>>>>>
>>>>>
>>>>> End of Nek5000-users Digest, Vol 35, Issue 7
>>>>> ************************************************
>>>>>
>>>>>
>>>>>
>>>>
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