Compiler version and offloading errors
while playing with the offloading examples found on this forum I ran into a little snag:host A: Scientific Linux 6.5, Intel compiler v14, Xeon Phi 7100, mpss 3.3.2 stackhost B: CentOS 6.5, Intel...
View ArticleCompiler version and offloading errors
while playing with the offloading examples found on this forum I ran into a little snag:host A: Scientific Linux 6.5, Intel compiler v14, Xeon Phi 7100, mpss 3.3.2 stackhost B: CentOS 6.5, Intel...
View Articleusing version 2015 of the compiler to build for mic does not seem to work on...
I am trying to compile for both MIC and the host, and am hitting this error: x86_64-k1om-linux-ld: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by x86_64-k1om-linux-ld)...
View Articlempss 3.4 - No Mic cards found or specified on command line
I bet this is most common issue. We have installed the Card and the MPSS software. We are getting this message.# micctrl --initdefaults [Warning] No Mic cards found or specified on command lineWe are...
View Articleproc_bind
I specify for example my env variables as follows: "mic_kmp_place_threads=Xc,1t", "mic_omp_num_threads=X", "mic_kmp_affinity=scatter". I keep X smaller than available cores on mic.1) Would there be any...
View Articleifort (ver 15) args
I compile my programs using ifort Version 15.0. For mic offloaded code I compile it using "-offload" argument, as far as I know it has to be "-qoffload", but why I don't get any warnings when I compile...
View ArticlePrefetching in Xeon Phi
Hi,I would like to disable both software and hardware prefetching on the Xeon Phi. Software prefetching can be disabled via the compiler, but I don't know how to disable the hardware prefetcher. Any...
View ArticleXeon Phi Coprocessor and Citrix XenServer 6.2
I am trying to use the Intel Xeon Phi Coprocessor card with a Citrix XenServer 6.2 guest VM (HVM guest) with PCI passthrough.The following is my setup:SuperMicro SYS-6037R-72RTF+ Dom0: XenServer...
View Articlemic0 connection problem
I would used mic0 through ssh, but suddenly doesnt it work. [----@localhost ~]$ micctrl -s mic0: online (mode: linux image: /usr/share/mpss/boot/bzImage-knightscorner) [----@localhost ~]$ ssh mic0...
View Articleintel parallel studio 2015
Recently i installed and compiled WRF with this version "intel parallel studio 2015".I used intel mpi and i cant run WRF. i obtained mpi errors in the execution. Finally i downgrade to version 2013 and...
View ArticleIs it possible to offload a string array to xeon phi
I want to get all substring of a string on xeon phi First, I read a txt file from args and store it into a pointer array like thischar *temp_string[N_ELEMENT];Second, I want to using pragma offlad to...
View Articlewhy this simple offload give Segmentation fault error
this simple test code is this(testclass.cpp):#include <iostream>class TEST{ public: double *A; public: TEST(double * _A){A = _A;} void run(){ A[1] = 0; // double *B = A;...
View Articleqopt-report
I am using the -qopt-report3 -qopt-report-phase-report=vec while compiling my code with offloaded section. But I don't get any report on vectorization. 1) Why is that?2) is there a way to request only...
View Articlemic_kmp_place_threads
Just a quick question, if I set for example mic_kmp_place_threads=60c,1t/60c,2t/60c,3t and mic_omp_proc_bind=close, then I assume the above means that I will have 60 cores utilized and in each of them...
View Articleofflat attribute
I have compiled my program "a.f", which contains the subroutine asub, with -qoffload-attribute-target=mic. Now in another file "b.f", inside the "!dir$offload target (mic)" I call this "asub". But in...
View Articleproblems with getting micras working
I'm trying to set up micras and relmon so that we can keep an eye on the Phi cards less manually. Unfortunately the documentation in the MPSS user guide is quite sparse. It refers to some config files...
View ArticleClik here to view.
Offload performance differences
based on a sample program posted here by @Rajiv Deodhar : (thanks for the sample program!) I ran into some strange results with my Xeon Phi's here:HostA: xeon E5 2695 v2 w/ Xeon Phi 7100, Scientific...
View ArticleClik here to view.
vectorization intensity 0.0 in SIMD vectorized loop for MIC application
Hello everyone,I am writing code for an n-body simulation that I would like to put on a xeon phi. The subroutine I am working on involves calculating the energy of the system via a pairwise summation....
View ArticlePerformance degradation if loop count is not known at compile time
I am creating a simple matrix multiplication procedure, operating on the Intel Xeon Phi architecture.After many attempts with autovectorization, trying to get better performances, I had to use Intel...
View ArticleOpenCL rpm issues
Hi all,while investigating https://software.intel.com/en-us/forums/topic/534808 I decided to install the OpenCL drivers for the Xeon Phi; I ran into two issues while installing the package...
View Article