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Subject: Re: [OMPI users] error when sending a single 'long double' from an amd64 architecture to a ppc and a sparc machine
From: George Bosilca (bosilca_at_[hidden])
Date: 2008-04-03 15:22:18


Patrick,

As far as I know this was working fine few months ago ...
I will take a look at this next week. Can you send me the 2 config.log
files on your 2 machines.

Thanks,
   george.

On Apr 2, 2008, at 7:55 PM, Patrick Heckeler wrote:
> Hi everybody,
>
> I tried to submit a single 'long double' from an amd64 architecture to
> a ppc, from an amd64 to a sparc machine and from ppc to sparc. The
> testprogram and the results are shown below. All other basic datatypes
> I have tested are working fine with heterogenous communication. Does
> anybody have an idea? I am using openMPI 1.2.4.
>
> Testprogramm:
> #include <mpi.h>
> #include <iostream>
>
> int main(int argc, char *argv[])
> {
> int me, numprocs;
> long double senddata = 3.14;
> long double recvdata;
> MPI_Status status;
> MPI_Init(&argc, &argv);
>
> MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
> MPI_Comm_rank(MPI_COMM_WORLD, &me);
>
> if(me==0)
> {
> std::cout << "Long double to send: " << senddata << std::endl;
> MPI_Send(&senddata, 1, MPI_LONG_DOUBLE, 1, 123, MPI_COMM_WORLD);
> }
> else
> {
> MPI_Recv(&recvdata, 1, MPI_LONG_DOUBLE, 0, 123, MPI_COMM_WORLD,
> &status);
> std::cout << "Long double received: " << recvdata << std::endl;
> }
> MPI_Finalize();
> }
> --
> Output from amd64 to ppc:
> unpack there is still room in the input buffer 8 bytes
> Long double received: 8.19027e+3364
> Long double to send: 3.14
>
> Output from amd64 to sparc:
> Long double to send: 3.14
> [hannibal:17063] *** An error occurred in MPI_Recv
> [hannibal:17063] *** on communicator MPI_COMM_WORLD
> [hannibal:17063] *** MPI_ERR_TRUNCATE: message truncated
> [hannibal:17063] *** MPI_ERRORS_ARE_FATAL (goodbye)
> mpirun noticed that job rank 0 with PID 21916 on node murdock exited
> on signal 15 (Terminated).
>
> Output from ppc to sparc:
> Long double to send: 3.14
> Long double received: 1146.88
>
> *********************************************************
>
> Information of the amd64 machine:
>
> configure:
> ./configure --prefix=/usr/local/ CFLAGS=-m32 CXXFLAGS=-m32 FFLAGS=-m32
> FCFLAGS=-m32 --with-wrapper-cflags=-m32 --with-wrapper-cxxflags=-m32
> --with-wrapper-fflags=-m32 --with-wrapper-fcflags=-m32
>
>
> uname -a:
> Linux hannibal 2.6.22-14-server #1 SMP Tue Dec 18 05:52:24 UTC 2007
> x86_64 GNU/Linux
>
> less /proc/cpuinfo:
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 15
> model : 33
> model name : Dual Core AMD Opteron(tm) Processor 275
> stepping : 2
> cpu MHz : 2193.774
> cache size : 1024 KB
> physical id : 0
> siblings : 2
> core id : 0
> cpu cores : 2
> fpu : yes
> fpu_exception : yes
> cpuid level : 1
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
> fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
> bogomips : 4390.91
> TLB size : 1024 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management: ts fid vid ttp
>
> processor : 1
> vendor_id : AuthenticAMD
> cpu family : 15
> model : 33
> model name : Dual Core AMD Opteron(tm) Processor 275
> stepping : 2
> cpu MHz : 2193.774
> cache size : 1024 KB
> physical id : 0
> siblings : 2
> core id : 1
> cpu cores : 2
> fpu : yes
> fpu_exception : yes
> cpuid level : 1
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
> fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy
> bogomips : 4387.61
> TLB size : 1024 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management: ts fid vid ttp
>
> processor : 2
>
> ************************************************************
>
> information of the ppc:
>
> configure:
> ./configure --prefix=/usr/local --enable-static
> --enable-ltdl-convenience --no-create --no-recursion
>
> uname -a:
> Linux baracus 2.6.18-5-powerpc #1 Sat Dec 22 21:05:48 UTC 2007 ppc
> GNU/Linux
>
> less /proc/cpuinfo:
> processor : 0
> cpu : 7410, altivec supported
> temperature : 23-25 C (uncalibrated)
> clock : 533.333332MHz
> revision : 0.3 (pvr 800c 1103)
> bogomips : 66.30
> timebase : 33290001
> platform : PowerMac
> machine : PowerMac3,4
> motherboard : PowerMac3,4 MacRISC2 MacRISC Power Macintosh
> detected as : 69 (PowerMac G4 Silver)
> pmac flags : 00000010
> L2 cache : 1024K unified
> pmac-generation : NewWorld
>
> ************************************************************
>
> information of the sparc:
>
> configure:
> ./configure CFLAGS=-mv8plus CXXFLAGS=-mv8plus FFLAGS=-mv8plus
> FCFLAGS=-mv8plus --prefix=/usr/local --enable-static
> --enable-ltdl-convenience --no-create --no-recursion
>
> uname -a:
> Linux murdock 2.6.22-14-sparc64-smp #1 SMP Tue Dec 18 05:40:10 UTC
> 2007 sparc64 GNU/Linux
>
> less /proc/cpuinfo:
> cpu : TI UltraSparc III (Cheetah)
> fpu : UltraSparc III integrated FPU
> prom : OBP 4.16.4 2004/12/18 05:18
> type : sun4u
> ncpus probed : 2
> ncpus active : 2
> D$ parity tl1 : 0
> I$ parity tl1 : 0
> Cpu0ClkTck : 000000002cb41780
> Cpu1ClkTck : 000000002cb41780
> MMU Type : Cheetah
> State:
> CPU0: online
> CPU1: online
>
>
> Thanks in advance for your help
>
> --
> Viele Grüße / Kind regards
>
> Patrick Heckeler
>
> Teckstr. 6
> 72074 Tübingen
> Germany
>
>
> Mobil: +49172 / 719 23 24
> email: pheckeler [at] gmail [dot] com
> skype: p_heckeler
> ICQ: 200910972
>
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