Performance issues with Intel MPI (barriers) between Xeon Phi coprocessors
I'm getting bad performance with MPI barriers in a microbenchmark on this system configuration:multiple Xeon Phi coprocessorsIntel MPSS 3.5 (April 2015), LinuxIntel MPI 5.0 update 3OFED-3.12-1export...
View ArticleForce xeon level precision on Xeon phi or vice versa
Hi all,I have been running a program where precision of doubles mean a lot to my program.However due to some strange reason it seems like Xeon phi is rounding off a few bits(at 10^-8th bit) and this...
View ArticleXeon Phi crashes on too-large SCIF memory registration
Is there a mechanism with SCIF to register a memory region with all endpoints? At the moment, I have a for-loop with scif_register() on this memory region with each endpoint. Memory registration is...
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Optmization Techniques for the Intel® MIC Architecture: Part 2 of 3
AbstractThis is part 2 of a 3-part educational series of publications introducing select topics on optimization of applications for Intel’s multi-core and manycore architectures (Intel® Xeon®...
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What is Code Modernization?
Modern high performance computers are built with a combination of resources including: multi-core processors, many core processors, large caches, high speed memory, high bandwidth inter-processor...
View ArticleMPSS 3.5.1, Centos 7.1 x86_64-k1om-linux-ld: relocation error
Updated my mmic system to Centos 7.1, and when trying to compile hello_world withifort -mmic hello_world.f90 -o hello_world.f90get a link error:x86_64-k1om-linux-ld: relocation error:...
View ArticleSupplied binary does not match the Intel(R) Xeon Phi(TM) coprocessor that is...
I've been using an Intel Xeon Phi A3102 coprocessor with no issues for about 9 months now, but I recently started having issues running code natively on the device. When attempting to run a program via...
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What is Code Modernization?
Modern high performance computers are built with a combination of resources including: multi-core processors, many core processors, large caches, high speed memory, high bandwidth inter-processor...
View ArticleHow to use VTune with ssh public key?
Hello.My system forces users to use public key to access to not only the host system but also its coprocessors. I just want to collect some performance data from the Xeon Phi. (My application works in...
View ArticleCheck if a process is running on the Intel Phi
Hi everyone,For energy measurement purposes I need to run a program "X" on the Intel phi, that detects when a program "Y" is running in the Intel phi.Program X runs natively on the Intel Phi (I launch...
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Books - High Performance Parallelism Pearls
The two “Pearls” books contain an outstanding collection of examples of code modernization, complete with discussions by software developers of how code was modified with commentary on what worked as...
View Articleldaps connection
Hi all i would like to use mic checking users from ldap server.this is what works:root@serverX-mic0 ~]# cat /etc/ldap.conf URI ldap://192.168.1.12 BASE ou=domain1,ou=domain2,dc=domain3,dc=org binddn...
View ArticleOFFLOAD_REPORT explanation
Hi, Where can I get an explanation of the OFFLOAD_REPORT values? I using OFFLOAD_REPORT=2 and getting: [MKL] [MIC --] [AO Function] DPOTRF [MKL] [MIC --] [AO DPOTRF Workdivision] -1.00 -1.00 [MKL] [MIC...
View Article(repost)TLS definition in libmpi_mt.so section .tbss mismatches non-TLS...
Please see this post for the problem that i am facing while compiling NAMD for mic. i am using icc version (on centos 6.5 machine with mic) 15.0.0. for namd source compilation and i get :icpc: warning...
View ArticleMPSS 3.5.2 is available
Please note that the new MPSS 3.5.2 is now available at https://software.intel.com/en-us/articles/intel-manycore-platform-software-stack-mpss . RHEL 6.7 and SuSE SLES 11 SP4 are now supported in this...
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Phi Card Power Problem
I used "micsmc-gui" command to see the Phi Card Status. But I have two questions.Please to see the picture on the attachment.1.What's different type between "system %" and "user %" ?2.Why can't go to...
View ArticleNot seeing mic device in OpenCL devices
I am trying to run a Xeon Phi card under Ubuntu Server 14.04. I have installed mpss-3.3.5, opencl_runtime_14.2_x64_4.5.0.8, and intel_code_builder_for_opencl_2014_4.6.0.178_x64.miccheck says everything...
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Optimization Techniques for the Intel® MIC Architecture: Part 3 of 3
AbstractThis is part 3 of a 3-part educational series of publications introducing select topics on optimization of applications for Intel’s multi-core and manycore architectures (Intel® Xeon®...
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Optimization Techniques for the Intel® MIC Architecture: Part 1 of 3
AbstractThis is part 1 of a 3-part educational series of publications introducing select topics on optimization of applications for the Intel multi-core and manycore architectures (Intel® Xeon®...
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