Hi Christer,
If you're using gcc to compile your code, you may be able to compile with the -mlittle-endian option. That will make the gadget executable do the conversion automatically.
If that doesn't work I can regenerate those initial conditions files in big-endian format. Let me know if you're still having trouble and I will put the files on my website later today.
Best
Nathan Goldbaum
On Jan 17, 2012, at 9:14 AM, Christer Eriksson <agkbill_at_gmail.com> wrote:
>
> Ok, so that is the reason why I get "incorrect header format" the bit order is not correct.
>
> Is there any easy way to convert the input file? I have not made any input files myself, only used the one in the SIC example.
>
> /Christer
>
>
>
> On Tue, Jan 17, 2012 at 6:04 PM, Jay Jay Billings <jayjaybillings_at_gmail.com> wrote:
> The V440 is a 64-bit big-endian chip. Christer, you will have to convert your input file or run on a little-endian system.
>
> Jay
>
>
> On Tue, Jan 17, 2012 at 11:57 AM, Christer Eriksson <agkbill_at_gmail.com> wrote:
>
> I found that Sun Fire SPARC platforms use the big-endian format to store and operate on their data.
>
>
>
>
>
> On Tue, Jan 17, 2012 at 5:52 PM, christer eriksson <agkbill_at_gmail.com> wrote:
>
> Hi Max,
>
> I am unfortunately not familiar with big-endian and little-endian.
> How do I find out? Will google and se what I can find on V440.
>
> /Christer
>
>
>
>
>
>
>
> On 01/17/2012 05:47 PM, max kondel wrote:
>>
>> Hi Christer,
>>
>> Is V440 big-endian and your IC file little-endian?
>>
>> -Max
>>
>> On Tue, Jan 17, 2012 at 11:35 AM, Christer Eriksson <agkbill_at_gmail.com> wrote:
>>
>>
>>
>> Dear GADGET2 users,
>>
>> I have been following a guide at "http://astrobites.com/2011/06/11/running-your-first-sph-simulation/" as well as instructions at "http://www.mpa-garching.mpg.de/gadget/".
>>
>> I never managed to get Linux up and running OK on the server, tried with Gentoo but it was always something that did not work. FreeBSD and OpenBSD on the outher hand was very easy to get up and running.
>>
>> I have managed to install and build GADGET2 but have problems.
>>
>> When I start a simulation on my SunFire V440 it looks like this:
>>
>> ------------------------------------------------------------------------------------------------------------
>> [christer_at_V440 /usr/home/christer/GADGET2/SICtest]$ mpirun -np 4 ./Gadget2 15/SIC_015.param
>>
>> This is Gadget, version `2.0'.
>>
>> Running on 4 processors.
>> application called MPI_Abort(MPI_COMM_WORLD, 890) - process 0
>> rank 0 in job 1 V440_51366 caused collective abort of all ranks
>> exit status of rank 0: killed by signal 9
>>
>> Allocated 25 MByte communication buffer per processor.
>>
>> Communication buffer has room for 436906 particles in gravity computation
>> Communication buffer has room for 204800 particles in density computation
>> Communication buffer has room for 163840 particles in hydro computation
>> Communication buffer has room for 163840 particles in domain decomposition
>>
>>
>> Hubble (internal units) = 3.49333e-06
>> G (internal units) = 1.23414
>> UnitMass_in_g = 1.98992e+33
>> UnitTime_in_s = 1.07793e+12
>> UnitVelocity_in_cm_per_s = 46385.2
>> UnitDensity_in_cgs = 1.59194e-17
>> UnitEnergy_in_cgs = 4.28148e+42
>>
>> incorrect header format
>> task 0: endrun called with an error level of 890
>>
>>
>> [christer_at_V440 /usr/home/christer/GADGET2/SICtest]$
>> ---------------------------------------------------------------------------------------------------------------
>>
>>
>> Then I copy the Makefile to my Linux PC and also the SICtest/15 folder with following files:
>>
>> SIC_015.dat
>> SIC_015.param-usedvalues
>> energy.txt
>> parameters-usedvalues
>> SIC_015.param
>> cpu.txt
>> info.txt
>> timings.txt
>>
>>
>>
>> ###############################################
>>
>>
>>
>> Now everything runs OK, starting with:
>>
>> [christer_at_Arch SICtest]$ mpirun -np 2 ./Gadget2 15/SIC_015.param
>>
>> This is Gadget, version `2.0'.
>>
>> Running on 2 processors.
>>
>> Allocated 25 MByte communication buffer per processor.
>>
>> Communication buffer has room for 436906 particles in gravity computation
>> Communication buffer has room for 204800 particles in density computation
>> Communication buffer has room for 163840 particles in hydro computation
>> Communication buffer has room for 163840 particles in domain decomposition
>>
>>
>> Hubble (internal units) = 3.49333e-06
>> G (internal units) = 1.23414
>> UnitMass_in_g = 1.98992e+33
>> UnitTime_in_s = 1.07793e+12
>> UnitVelocity_in_cm_per_s = 46385.2
>> UnitDensity_in_cgs = 1.59194e-17
>> UnitEnergy_in_cgs = 4.28148e+42
>>
>>
>> Allocated 1.59375 MByte for particle storage. 68
>>
>> Allocated 1.96875 MByte for storage of SPH data. 84
>>
>>
>> reading file `./15/SIC_015.dat' on task=0 (contains 32768 particles.)
>> distributing this file to tasks 0-1
>> Type 0 (gas): 32768 (tot= 0000032768) masstab=0
>> Type 1 (halo): 0 (tot= 0000000000) masstab=0
>> Type 2 (disk): 0 (tot= 0000000000) masstab=0
>> Type 3 (bulge): 0 (tot= 0000000000) masstab=0
>> Type 4 (stars): 0 (tot= 0000000000) masstab=0
>> Type 5 (bndry): 0 (tot= 0000000000) masstab=0
>>
>> reading done.
>> Total number of particles : 0000032768
>>
>> allocated 0.0762939 Mbyte for ngb search.
>>
>> Allocated 2.22545 MByte for BH-tree. 68
>>
>> domain decomposition...
>> NTopleaves= 120
>> work-load balance=1.00043 memory-balance=1.00043
>> exchange of 0000016413 particles
>> domain decomposition done.
>> begin Peano-Hilbert order...
>> Peano-Hilbert done.
>> Begin Ngb-tree construction.
>> Ngb-Tree contruction finished
>> ngb iteration 1: need to repeat for 0000030189 particles.
>> ngb iteration 2: need to repeat for 0000004023 particles.
>> ngb iteration 3: need to repeat for 0000003197 particles.
>> ngb iteration 4: need to repeat for 0000002915 particles.
>> ngb iteration 5: need to repeat for 0000001626 particles.
>>
>> Setting next time for snapshot file to Time_next= 0
>>
>>
>> writing snapshot file...
>> done with snapshot.
>>
>> Setting next time for snapshot file to Time_next= 0.0025
>>
>>
>> Begin Step 0, Time: 0, Systemstep: 0
>> domain decomposition...
>> NTopleaves= 120
>> work-load balance=1.00043 memory-balance=1.00043
>> domain decomposition done.
>> begin Peano-Hilbert order...
>> Peano-Hilbert done.
>> Start force computation...
>> Tree construction.
>> Tree construction done.
>> Begin tree force.
>>
>>
>> ######################################
>>
>>
>>
>>
>> Any idea why it does not work on the SUN server?
>>
>> All input most appreciated, would be great to get GADGET2 up and running OK.
>>
>>
>> Thank you.
>>
>> Best reagrds,
>> /Christer
>>
>>
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Received on 2012-01-17 18:38:32