Intel® Clusters and HPC Technology

MPI equivalent of KMP_PLACE_THREADS on MIC

Hello All,

When I run pure OpenMP example on MIC, I find KMP_PLACE_THREADS very useful. (for example, I can benchmark using 8 cores and 3 threads on every core with "KMP_PLACE_THREADS=8c,3t,0O"

What is MPI equivalent for this? (I am running pure mpi application natively on MIC with Intel MPI) 

In the documentation I see I_MPI_PIN_PROCESSOR_LIST where I can provide the list of specific processors. Is there any other way?


Intel ITAC error


I am using Intel Traceanalyzer to profile an application called CESM. Since I want to profile the user defined functions, I instrument the code using the -tcollect option during compilation. This happens successfully. 

After compilation, I use the -trace option in the mpirun command. 

After the run is completed, I see that the several trace files are generated. 

When I open the $application.stf file (the appropriate stf file), I get the following error in the Intel Traceanalyzer. 

Does n550 cpu support parallel programming(mpi)?

Hello everyone,

i have samsung n150 plus netbook. it has intel n550 cpu. i want to develop some mpi programs with this device but i can't install MPICH libraries or any others. When i tried, i get warning like this.

'This installation package is not supported by this processor type. Contact the product vendor.'


But when i searched, learned that n550 has 2 cores. What is the problem, i can't solve it. Is there any program(or supporting thing) for this processor (n550), using for parallel programming?


Profiling a complex MPI Application : CESM (Community Earth System Model)


CESM is a complex MPI climate model which is a highly parallel application. 

I am looking for ways to profile CESM runs. The default profiler provides profiling data for only a few routines. I have tried using external profilers like TAU, HPC Toolkit, Allinea Map, ITAC Traceanalyzer and VTune. 

As I was running CESM across a cluster (with 8 nodes - 16 processors each), it was most beneficial to use HPC Toolkit and Allinea Map for profiling. However, I am keen on finding two metrics for each CESM routine executed.  These are :

Performance issues of Intel MPI on Windows 7 SP 1 with 2x18 cores cpus.

Dear support team,

I have a question about a performance difference between Windows 7 SP 1 and RHEL 6.5.

The situation is as follows:
The hardware is a DELL precision rack 7910, see link for exact specification (click on components):

MPI_Init_thread or MPI_Init failed in child process

I have two programs, A and B. They all are developed with MPI. A will call B. 

If I directly start A and call B, every thing is OK.

If I start A with mpiexec, like mpiexec -localonly 2 A.exe, and call B. MPI_Init_thread or MPI_Init will fail in B. 

Below is the error message I got.

need to type "Enter" ?

Hi, Everyone,

I am running my hybrid MPI/OpenMP jobs on 3-nodes Infiniband PCs Linux cluster. each node has one MPI process that has 15 OpenMP threads. This means my job runs with 3 MPI processes and each MPI process has 15 threads.

the hosts.txt file is given as follows:


 I wrote the following batch file as follows:

/************** batch file******************/

Intel MPI and I_MPI_EXTRA_FILESYSTEM: How to tell it's on?


I hope the Intel MPI experts here can help me out. Intel MPI was recently installed on our cluster, a cluster that uses a GPFS filesystem. Looking at the release notes I saw that "I_MPI_EXTRA_FILESYSTEM_LIST gpfs" was now available. Great! I thought I'd try to see if I can see an effect or not.

Cannot use jemalloc with IntelMPI


I've tried to bench several memory allocators on Linux (64-bit) such as ptmalloc2, tcmalloc and jemalloc with an application linked against IntelMPI (

Launching any application linked with jemalloc will cause the execution to abort with a signal 11. But the same application, when not linked with IntelMPI will work without any issue.

Is IntelMPI doing its own malloc/free ?
How can this issue be overcome ?



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