[petsc-users] Eigenvalue problem in batch

[venkatesh g]

Hi,
I have access to Cray with many cores.
It takes about 100 secs to solve in a single core. If I require to solve it
sequentially, it will take a lot of time.
Ok I can ask the admins, but in case you have an idea, pls. let me know.

Best Regards,
Venkatesh

On Fri, Dec 18, 2015 at 2:32 PM, Timothée Nicolas <
timothee.nicolas at gmail.com> wrote:

> You need to be more specific, what kind of machine do you have ? If you
> have very few cores, it will not help much to launch them all at the same
> time, but at least you can make the thing automatic using the loop as I
> told you. Your computer will solve the first problem and then automatically
> go to the second etc etc. How much time does it take do perform your task
> on one set of matrices A and B ?
>
> If you are on a cluster with many many cores, then you can probably launch
> your task in parallel, but I don't know how to do this exactly. But if it's
> a cluster, you can ask the administrators.
>
> Best
>
> Timothee
>
>
>
> 2015-12-18 17:40 GMT+09:00 venkatesh g <venkateshgk.j at gmail.com>:
>
>> Hi Timothee,
>>
>> Yes I have A_0001.bin ... A_1000.bin and B_0001.bin... B1000.bin. Yes is
>> it possible to submit at same time ?
>>
>> Venkatesh
>>
>> On Fri, Dec 18, 2015 at 1:28 PM, Timothée Nicolas <
>> timothee.nicolas at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> Can you be a bit more specific ? You have 1000 different files for A and
>>> B ? Like, you have A_0001.bin, A_0002.bin, ... A_1000.bin and B_0001.bin,
>>> B_0002.bin, ... B_1000.bin ?
>>>
>>> In that case it's a bash problem and not a petsc problem, you just need
>>> to make a loop on an integer i, use something like
>>>
>>> printf -v i2 "%04d" ${i}
>>>
>>> so that i2 is written as 0001, 0002, ... 1000, and not as 1, 2, ... ,
>>> 1000, concatenate i2 with 'A_' or 'B_' and put that in your launch string.
>>> I expect it should work, you can put variables as petsc arguments.
>>>
>>> But what do you mean with multiple cores ? You want to do it in parallel
>>> at the same time ? Then I don't know how to do it.
>>>
>>> Best
>>>
>>> Timothee
>>>
>>>
>>>
>>> 2015-12-18 16:46 GMT+09:00 venkatesh g <venkateshgk.j at gmail.com>:
>>>
>>>> Hi all,
>>>> I am using Petsc and Slepc to solve my eigenvalue problem.
>>>>
>>>> I have 1000 A and B matrices saved as binary files. So I use in my
>>>> script :
>>>>
>>>> *aprun -n 1 -N 1 ./ex7 -f1 A -f2 B -st_type sinvert -eps_target 0.01 *
>>>>
>>>> This is for one A and one B. So, how to do it for each A and B in
>>>> multiple cores ?
>>>>
>>>> Pls. let me know.
>>>>
>>>> Thank you
>>>> Venkatesh
>>>>
>>>>
>>>>
>>>
>>>
>>
>
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