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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>>
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>
>
Received on 2012-01-17 17:57:49