[Trilinos-Users] [EXTERNAL] Re: Tpetra and threads

[Bruno Turcksin]

There is a problem with the ssl certificate. Personally, I just disable 
SSL when I need to clone Trilinos (it's not safe though). Try:

  env GIT_SSL_NO_VERIFY=true git clone 
https:://software.sandia.gov/trilinos/repositories/publicTrilinos

Best,

Bruno


On 04/13/2015 04:47 PM, Zheng Da wrote:
> Is the git repo available for everyone?
>
> $ git clone https://software.sandia.gov/trilinos/repositories/publicTrilinos
> Cloning into 'publicTrilinos'...
> fatal: unable to access
> 'https://software.sandia.gov/trilinos/repositories/publicTrilinos/':
> server certificate verification failed. CAfile:
> /etc/ssl/certs/ca-certificates.crt CRLfile: none
>
> On Mon, Apr 13, 2015 at 5:37 PM, Hoemmen, Mark <mhoemme at sandia.gov> wrote:
>> public git repo (see trilinos.org)
>>
>> On 4/13/15, 3:26 PM, "Zheng Da" <zhengda1936 at gmail.com> wrote:
>>
>>> Hello Mark,
>>>
>>> Tpetra Lesson 07 doesn't exist in tpetra/core/example of v11.14.1.
>>> Which version of Trilinos should I look at?
>>>
>>> Thanks,
>>> Da
>>>
>>> On Mon, Apr 13, 2015 at 4:30 PM, Hoemmen, Mark <mhoemme at sandia.gov> wrote:
>>>>
>>>> On 4/13/15, 12:00 PM, "trilinos-users-request at software.sandia.gov"
>>>> <trilinos-users-request at software.sandia.gov> wrote:
>>>>> Message: 1
>>>>> Date: Mon, 13 Apr 2015 15:49:21 +0200
>>>>> From: Martin Vymazal <martin.vymazal at vki.ac.be>
>>>>> To: trilinos-users at software.sandia.gov
>>>>> Subject: [Trilinos-Users] Tpetra and threads
>>>>> Message-ID: <2697171.BCGQzWlqIO at tinlaptop>
>>>>> Content-Type: text/plain; charset="us-ascii"
>>>>>
>>>>> Hello,
>>>>>
>>>>> I have a toy FE problem, for which I use Tpetra map, and Tpetra CRS
>>>>> matrix to
>>>>> store and solve the linear system. Everything works fine when I run the
>>>>> code in
>>>>> serial, but when I try assembly with 2 threads (using std::thread from
>>>>> C++11),
>>>>> I get memory crashes.
>>>>>
>>>>> What I'm trying to do is this:
>>>>> 1) Initialize system matrix (in serial)
>>>>> 2) Run assembly with multiple threads (that I launched outside of
>>>>> Trilinos)
>>>>> 3) When assembly is finished and threads join, solve the linear system
>>>>> (in
>>>>> serial again)
>>>>>
>>>>> I understand that this is not the best/most optimal way, but all I
>>>>> wanted
>>>>> to
>>>>> try is a simple test and it would really help me if I could ask
>>>>> Tpetra/Kokkos
>>>>> not to get in my way. From the output it seems that Kokkos starts
>>>>> automatically its own thread and it probably does not like the fact that
>>>>> later
>>>>> on, different number of threads accumulate in the system matrix.
>>>>>
>>>>> I get the following:
>>>>>
>>>>> Kokkos::HostSpace::decrement( 0x168c180 ) ERROR :  memory not being
>>>>> tracked
>>>>>
>>>>> I searched for examples how to set the Tpetra map parameters in order to
>>>>> control the number of threads, but they all only show how (not) to use
>>>>> MPI,
>>>>> nothing said about multithreading ... Is what I'm trying to do possible?
>>>>> Can I
>>>>> tell Trilinos 'not to worry' about my threads?
>>>>>
>>>>> Thank you for your help,
>>>>>
>>>>> Martin Vymazal
>>>> Hi Martin,
>>>>
>>>> Please see Tpetra Lesson 07 (in tpetra/core/example) for a demonstration
>>>> of thread-parallel sparse matrix construction and fill.  The interface
>>>> of
>>>> Tpetra::CrsMatrix does not promise thread safety; we have a lower-level
>>>> interface (which the example uses) that does.
>>>>
>>>> mfh
>>>>
>>>> _______________________________________________
>>>> Trilinos-Users mailing list
>>>> Trilinos-Users at software.sandia.gov
>>>> https://software.sandia.gov/mailman/listinfo/trilinos-users
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