Hi Ilya
1) The only thing that stands out as very different from
what I do here is your configuration flag "--enable-mpi-threads".
Maybe some OpenMPI pro/developer could shed some light about this,
whether that flag could be a potential source for the errors you see.
Considering that when you s
Happy New Year, Gus!
Yes, I'm using affinity. This is my openmpi-mca-params.conf file:
---
# Use RSH instead SSH
pls_rsh_agent=rsh
# Turning on processor affinity
mpi_paffinity_alone=1
# Include using eth1.
btl_tcp_if_include=eth1
# Exclude using lo and eth0.
btl_tcp_if_exclude=lo,eth0
---
I r
Hi Ilya
Well, many possibilities to explain the error have
been discarded already.
Another long shot:
Have you tried to set the processor affinity?
Not sure how it would work on Xeons.
We have AMD processors here, and setting processor affinity
does help performance, on HPL and other programs.
I
Hey!
2009/12/29 Gus Correa :
> Hi Ilya
>
> OK, with 28 nodes and 4GB/node,
> you have much more memory than I thought.
> The maximum N is calculated based on the total memory
> you have (assuming the nodes are homogeneous, have the same RAM),
> not based on the memory per node.
Yep. I know. I've p
Hi Ilya
OK, with 28 nodes and 4GB/node,
you have much more memory than I thought.
The maximum N is calculated based on the total memory
you have (assuming the nodes are homogeneous, have the same RAM),
not based on the memory per node.
I haven't tried OpenMPI 1.3.3.
Last I ran HPL was with OpenM
Hello, Gus!
Sorry for the lack of debug info.
I have 28 nodes. Each node have 2 processors Xeon 2.4 GHz with 4 Gb RAM.
OpenMPI 1.3.3 was compiled as:
CC=icc CFLAGS=" -O3" CXX=icpc CXXFLAGS=" -O3" F77=ifort FFLAGS=" -O3"
FC=ifort FCFLAGS=" -O3" ./configure --prefix=/opt/openmpi/intel/
--enable-debu
Hi Ilya
Did you recompile HPL with OpenMPI, or just launched the MPICH2
executable with the OpenMPI mpiexec?
You probably know this, but you cannot mix different MPIs at
compile and run time.
Also, the HPL maximum problem size (N) depends on how much
memory/RAM you have.
If you make N too big, t
Good day, everyone!
I have problem while running HPL benchmark with OPENMPI 1.3.3.
When problem size (Ns) smaller 1 - all is good. But when I set Ns
to 17920 (for example) - I get errors:
===
[ums1:05086] ../../ompi/datatype/datatype_pack.h:37
Pointer 0xb27752c0 size 4032 is outside [
