[Linuxppc-users] OpenMPI deviations & Power hardware bounds checking

[Bill Schmidt]

I posted at least a partial reply for this.  The downlevel GCC 4.8.5 is almost assuredly a problem.  I'm not familiar enough with CentOS to know whether the RHEL packages for Advance Toolchain 10.0 and Developer Toolset 6 are unofficially available.  I would think both would work.

-- Bill

Bill Schmidt, Ph.D.
GCC for Linux on Power
Linux on Power Toolchain
IBM Linux Technology Center
wschmidt at linux.vnet.ibm.com

> On Jun 9, 2017, at 2:32 PM, Nicole Trudeau <nitrud at ca.ibm.com> wrote:
> 
> Hi everyone,
> 
> I monitor user questions that come in about IBM XL compilers for Linux on Power and 2 things came up on my radar that are not directly related to XL that the broader Linux on Power team may be able to help answer - feel free to reply directly on the Stack Overflow or developerWorks links - really appreciate the help in advance!
> 	• developerWorks Forum: Thanks to Bill Buros for commenting today. Here's a summary of the problem "I'm having a problem with openmpi 2.1.0 and Abinit. When i run abinit task with np (number of processes) = 1 task executes fine. With np = 2 small deviations appear. With larger np task ends with an error. I compiled abinit using GNU C/C++/Fortran 4.8.5 compilers and NVIDIA Cuda 8.0.61"
> 	• Stack Overflow: "Do any CPUs have hardware support for bounds checking?" A reply has been given about x86, but no reply about Power yet. Does Power support it?
> 
> Thanks,
> Nicole Trudeau
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