Hi Gilles,
Thanks for reply....
i have configured as below for arm
./configure --enable-orterun-prefix-by-default
--prefix="/home/nmahesh/Workspace/ARM_MPI/openmpi"
CC=arm-openwrt-linux-muslgnueabi-gcc CXX=arm-openwrt-linux-muslgnueabi-g++
--host=arm-openwrt-linux-muslgnueabi --enable-script-wrapper-compilers
--disable-mpi-fortran* --enable-dlopen* --enable-shared --disable-vt
--disable-java --disable-libompitrace --disable-static
While i am running the using mpirun
am getting following errror..
root@OpenWrt:~# /usr/bin/mpirun --allow-run-as-root -np 1
/usr/bin/openmpiWiFiBulb
--------------------------------------------------------------------------
Sorry! You were supposed to get help about:
opal_init:startup:internal-failure
But I couldn't open the help file:
/home/nmahesh/Workspace/ARM_MPI/openmpi/share/openmpi/help-opal-runtime.txt:
No such file or directory. Sorry!
kindly guide me...
On Fri, Oct 28, 2016 at 5:34 PM, Mahesh Nanavalla <
[email protected]> wrote:
> Hi Gilles,
>
> Thanks for reply....
>
> i have configured as below for arm
>
> ./configure --enable-orterun-prefix-by-default
> --prefix="/home/nmahesh/Workspace/ARM_MPI/openmpi"
> CC=arm-openwrt-linux-muslgnueabi-gcc CXX=arm-openwrt-linux-muslgnueabi-g++
> --host=arm-openwrt-linux-muslgnueabi --enable-script-wrapper-compilers
> --disable-mpi-fortran* --enable-dlopen* --enable-shared --disable-vt
> --disable-java --disable-libompitrace --disable-static
>
> While i am running the using mpirun
> am getting following errror..
> root@OpenWrt:~# /usr/bin/mpirun --allow-run-as-root -np 1
> /usr/bin/openmpiWiFiBulb
> --------------------------------------------------------------------------
> Sorry! You were supposed to get help about:
> opal_init:startup:internal-failure
> But I couldn't open the help file:
>
> /home/nmahesh/Workspace/ARM_MPI/openmpi/share/openmpi/help-opal-runtime.txt:
> No such file or directory. Sorry!
>
>
> kindly guide me...
>
> On Fri, Oct 28, 2016 at 4:36 PM, Gilles Gouaillardet <
> [email protected]> wrote:
>
>> Hi,
>>
>> i do not know if you can expect same lib size on x86_64 and arm.
>> x86_64 uses variable length instructions, and since arm is RISC, i
>> assume instructions are fixed length, and more instructions are
>> required to achieve the same result.
>> also, 2.4 MB does not seem huge to me.
>>
>> anyway, make sure you did not compile with -g, and you use similar
>> optimization levels on both arch.
>> you also have to be consistent with respect to the --disable-dlopen option
>> (by default, it is off, so all components are in
>> /.../lib/openmpi/mca_*.so. if you configure with --disable-dlopen, all
>> components are slurped into lib{open_pal,open_rte,mpi}.so,
>> and this obviously increases lib size.
>> depending on your compiler, you might be able to optimize for code
>> size (vs performance) with the appropriate flags.
>>
>> last but not least, strip your libs before you compare their sizes.
>>
>> Cheers,
>>
>> Gilles
>>
>> On Fri, Oct 28, 2016 at 3:17 PM, Mahesh Nanavalla
>> <[email protected]> wrote:
>> > Hi all,
>> >
>> > I am using openmpi-1.10.3.
>> >
>> > openmpi-1.10.3 compiled for arm(cross compiled on X86_64 for openWRT
>> linux)
>> > libmpi.so.12.0.3 size is 2.4MB,but if i compiled on X86_64 (linux)
>> > libmpi.so.12.0.3 size is 990.2KB.
>> >
>> > can anyone tell how to reduce the size of libmpi.so.12.0.3 compiled for
>> > arm.
>> >
>> > Thanks&Regards,
>> > Mahesh.N
>> >
>>
>
>
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