Problem offloading loops in an OpenMP region
Hello,Here is an example that contains some features of a larger code I want to run on MIC in offload mode. I'm begining with offload mode. It doesn't work and I do not understand why. That is an...
View Article_Cilk_offload in DLLs
The release notes for the 2015 compiler mentions this :3.5.3.1 Limitations of _Cilk_shared* _Cilk_offload may not be used in a program that uses shared libraries (DLLs) What is the reason for this?...
View Articlempss-3.4.1 automount autofs missing
Hello,I am just new in mic world :-) I build really small cluster with one master node and one computing node with xeon phi in my university.My cluster is in network with private IPs.- master node...
View ArticleCOIEngineGetHandle fails on SLES11 SP3
Hello,I have installed MPSS 3.4.1 on SLES11 SP3 and by some reason COI "hello world" does not work. The installed MIC card is working fine (COIEngineGetCount returns 1 device), but COIEngineGetHandle()...
View ArticleRunning a mic target with Vtune 2015 from the command line
Dear all,It seems that the behaviour of amplxe-cl has changed in 2015 and the knc-hotspots target is gone.I can run my project from amplxe-gui, but when I take the command line shown and try to execute...
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compiler internal error when compiling with gmpxx.h for mic with -std=c++11
Hi,I'm using gmp (https://gmplib.org/) for a project. With c++11 enabled AND using offload to mic, compilation gives me an internal error. I attached a small example for demonstration$icpc -fopenmp...
View ArticleCentOS 6.6 and MICs
I just upgraded my nodes hosting 4 Xeon Phi's to CentOS 6.6. The kernel is 2.6.32-504.el6.x86_64. I also upgraded the OFED drivers to Mellanox 2.3-2.0.0. Is this version compatible with MPSS 3.4.1?...
View Articlecsh shell - possible on mic ??
Hello,I got an error when I try to run CFD code AVL Fire on mic!Just see my workflow please:[root@wmpc41-mic0 ~]# vi /etc/profile #AVL PATH=/programme/AVL/bin:$PATH export PATH...
View Articlemic0 unresponsive to icmp requests
Hi ,I am working on MPSS3.2.3 and this command "micctrl --resetconfig" is giving me hard time going ahead.I was trying to do nfs mount on the mic0 and executed the following commands for the setup...
View ArticleXeon Phi under OpenCL
I am curious if the Xeon Phi coprocessors, specifically if they can be used "out of the box" in existing OpenCL applications that support the Xeon OpenCL Framework?I use software that uses OpenCL, and...
View ArticlepyMIC: A Python Offload Module for the Intel(R) Xeon Phi(TM) Coprocessor
Python has gained a lot of attention by the high performance computing community as an easy-to-use, elegant scripting language for rapid prototyping and development of flexible software. At the same...
View Articlecannot load library to the device 0 (error code 5)
hi， I recently met a error while using Xeon Phi. When the program run into the #pragma offload area, it occur error “offload error: cannot load library to the device 0 (error code 5)” and then exit. I...
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Offload problems. Can I do offload in a non-blocking way?
Hi there~I've met some problems and have some questions since I'm new to Intel phi.Our system has 3 mic cards per nodes. Now I'm trying to make these 3 cards and the host CPU work in parallel, just...
View ArticleMemory allocation overhead on MIC in offload mode
I'm observing a strange behavior and would like to know if it is Intel Xeon Phi related or not.I observed, that the memory transfer times from host to the mic are extremely high. I have tracked the...
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Improving MPI Communication between the Intel® Xeon® Host and Intel® Xeon Phi™
MPI Symmetric Mode is widely used in systems equipped with Intel® Xeon Phi™ coprocessors. In a system where one or more coprocessors are installed on an Intel® Xeon® host, Transmission Control Protocol...
View ArticleTaking a Long Shot (unsupported hardware)
I have an Asus z87-a motherboard, a couple notches down from the workstatoin model that officially supports the Phi, but on paper it's mostly the same thing. I am only even slightly optimistic because...
View ArticleOpenMP 4.0 teams on CPU and in native mode
Is there no way to use OpenMP teams on the CPU and on Xeon Phi in the native mode? See code and output below for my attempt to do that.#include <omp.h> #include <cstdio> int main() {...
View Articlequestion on intrinsics
Dear forum,Here is a simple pseudo-code I'm trying to implement1. load 8 float64 numbers from addr to create vec_a 2. load next, adjacent 8 float64 numbers from (addr+64) to create vec_b 3. perform...
View ArticleHow can I precisely measure cache related information on Phi?
HI,I know General Exploration of vTUne provides some cache related information of programs running on Phi. But it's too coarse, for example, it doesn't have L2 miss ratio, and it contains some hit...
View Articleprocess on the device 0 was terminated by signal 11 (SIGSEGV)
Hi, I recently met a weird problem. In the offload area like belowdouble *values=(double *)_mm_malloc(100*sizeof(double),64); #pragma offload target(mic:0) in(a:length(100)) { ... int idx=3;...
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