OpenMP program hangs with >256 threads
While trying to characterize some Phi performance over large numbers of OpenMP threads I've noticed strange behavior where programs hang with >256 threads.I've pared things down to the following...
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micsmc : fonts are not diplayed correctly on X11
Dear All,I have currently an issue with micsmc that doesn't seems to display the font correctly.Since this is static binary, I cannot find what kind of fonts it should use and I get some black cube...
View ArticleCan Intel Xeon Phi be configured to receive data direct from FPGA board,...
Can Intel Xeon Phi be configured to receive data direct from FPGA board, process them and send result to host memory?I have large flow of input data and don't want to have redundant transfers (FPGA...
View ArticleCan individual cores be turned off?
As an hobbyist developer, electricity cost is highest on my concern. So I just wanted to know whether it is technically possible to run the number of cores in proportional to power available off solar...
View ArticleUsing COI creating a new process on host
Hi,I am using COI programming model on Xeon phi. I can start a process on Xeon phi from host successfully, But I can not start a process on host from host or start a process on host from Xeon phi. For...
View ArticlePredict the performance on Intel xeon phi
Hello All, I'm trying to predict the performance of openmp programs on intel xeon phi using machine learning techniques. However, I wanted to know if there's any work that has been done on the same (I...
View Articleproblem executing in symmteric mode
Hi, I am trying to execute mic code from host. I am facing the following problem. Launch arguments: /usr/bin/ssh -x -q cm1 sh -c 'export I_MPI_ROOT="/opt/intel//impi/5.0.1.035" ; export...
View Articleoffload debugging in eclipse
I'm trying to debug offloaded code and followedhttps://software.intel.com/en-us/articles/debugging-intel-xeon-phi-appli...The general setup seems to work. But there are some error messages and when the...
View ArticleMap physical PCIe device to the Phi co-processor card?
Hello all,Is it possible to map a PCIe card (or virtual function) resident on the host PCIe tree to the Phi co-processor device for direct access / control by the Phi device? The PCIe card and the Phi...
View ArticlePoor Performance with function calls
Hello Everyone,i am doing a small test on Xeon Phi that calculates "pi" with "Calculate Pi Using an Infinite Series", see http://www.wikihow.com/Calculate-Pi . In my inplementation a small function is...
View Articleshared library load issue
Hi,I'm trying to run an executable in mic. I built it in a host with the following command: icpc -mmic -std=c++0x main.cpp.The code uses _Cilk_spawn and _Cilk_sync functions. When I copied the...
View Articledouble precision vs. single precision and vector alignment on MIC
Hello everyone, I have a subroutine that serves as the force calculation in an n-body simulation shown below. There a couple of arrays that I will describe which will hopefully make the subroutine a...
View Articledouble precision vs. single precision and vector alignment on MIC
Hello everyone, I have a subroutine that serves as the force calculation in an n-body simulation shown below. There a couple of arrays that I will describe which will hopefully make the subroutine a...
View ArticleIntel MKL linpack benchmark gets killed on Xeon Phi
Hi all,I've got a weird problem: I wanted to test the GLOPS performance of the Xeon Phi's that are entrusted to me: 2 x Xeon Phi 5110P, 1x Xeon Phi 7120 . I read that the linpack benchmark is included...
View ArticleTrouble installing MPSS on Ubuntu 12.04 - mic driver not loaded
Posting this question from a customer who noted an article: Comment by Riazuddin K.:Hello! I am trying to install "mpss-3.3.3" in my Ubuntu 12.04.5 LTS (GNU/Linux 3.13.0-37-generic x86_64) system. I...
View Articleerror while loading shared libraries libmpifort.so.12 on MIC
Hi,I was trying to run my executable natively on MIC but obtained the following error:[wzhang80@xpacc-serv-03-mic0 plascomcm]$ ./bin/plascomcm.mic ./bin/plascomcm.mic: error while loading shared...
View ArticleXeon Phi 31S1P 270W vs 300W
Hi,System: Ubuntu 14.03, MPSS 3.4.1, 31S1PWhen I run micinfo it display "Product 300W Passive CS" instead of 270W as product description. Is it a "feature" or a bug? Thanks, System Info HOST OS...
View ArticleIs there any way to link against an older version of MPSS
Hi Folks, I'm seeing some very strange performance with a computational chemistry code (CP2K) that I've previously benchmarked extensively on the Xeon Phi. I'm running in native mode for these tests....
View ArticleCPU compatibility with Xenon Phi ?
I am having hard time finding information on CPU compatibility with Xenon Phi's, if there is any.Will the Xeon Phi 31S1P and the MPSS 3.4 work with i7 4820k ? Is there any restriction on CPU ?Also, the...
View ArticleCPU compatibility with Xenon Phi ?
I am having hard time finding information on CPU compatibility with Xenon Phi's, if there is any.Will the Xeon Phi 31S1P and the MPSS 3.4 work with i7 4820k ? Is there any restriction on CPU ?Also, the...
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