Poor NFS performance
This has been a topic of discussion previously [1][2], but I haven't seen any comment from anybody at Intel regarding it: is there anything that can be done about the poor performance of NFS on the...
View Articleporting Linux kernel 2.6.38.8 (Xeon Phi) to a newer version
Dear all, as a part of a research project I am porting the Linux kernel of the Xeon Phi from version 2.6.38.8 to 3.2.14.I can successfully boot the kernel (i.e. I can see "<6>[ 45.740227]...
View Articlempss-3.2.3 installation problem
I have an installation problem of mpss-3.2.3 on CentOSPer 3.2.3 readme, (after stopping and unloading older version of mpss), I ran the uninstall.sh from 3.2.3. The readme showed using the 3.2.3...
View ArticleConversion from float64 to int64 - intrinsics
Hi,I am looking for a way to convert between 8xFloat64 vector and 8xInt64 vector. I was looking at intrinsics(in 14.0 reference and in zmmintr.h) and I found only this:__m512i __cdecl...
View ArticleMPI related questions
Hi,In MPI programs, is it possible to tell if a process is launched in the host or MIC at runtime? Also, is it possible for a MIC process to know in which host its corresponding MIC locates at...
View ArticleSharing RAM from host to Xeon Phi
Hi, i have a problem, i have shared Host's RAM as mic0's swap, using these steps http://unix.stackexchange.com/questions/134396/xeon-phi-swap-from-hosts-...But why it's so slow when swap is used?
View ArticleRead&Write cost vs Read cost of a cache line
'a' is a double array of size 10000. It is small enough to reside in cache of a core. Following operations run on a single core of Xeon Phi. The operations may be parallellized for 1,2, 3, or 4...
View ArticleI need some help about "undefined reference to _mm_tzcnti_64" link error
#include <stdio.h> #include <immintrin.h> #pragma offload_attribute(push,target(mic)) class mic_f{ public: union{ __m512 v; float f[16]; }; __forceinline operator __m512 () const {...
View ArticleProblem running MPI on two nodes: host and Xeon Phi
Hello,I am having trouble running a simple hello world test program on two nodes. I was hoping someone would be able to help.OS: CentOS 6Here is the error:[phi@localhost ~]$ mpirun -n 2 -host mic0...
View Articlevectorization on 64 byte windows for use on MIC
so I currently have a code in fortran whose premise is shown below. Recently I have tried to export my code to a MIC, and obtained the segfault warning. Upon some research, I learned this was most...
View Articlealigning arrays on 64 byte boundaries for use on MIC
I have recently tried to export a code to a MIC, and obtained the seg fault error. I did some research, and believed it was because my arrays were not aligned properly. I currently have a code whose...
View Articlemiccheck -ssh fail unexpected
Hi,i am using mpss 3.2.1 and i have configured an internal bridge in this way:micctrl --addbridge=br0 --type=internal --ip=172.31.1.254 micctrl --network=static --bridge=br0 --ip=172.31.1.1Everything...
View ArticleSeg. fault when using _m512_mul_pd
I'm an undergrad student working on some code for that is supposed to just do some simple matrix multiplication. The professor I'm working for has purchased a MIC and I'm trying to get things working...
View ArticleIPoIB in Xeon Phi
Hello, I am configurating Lustre in Xeon Phi. But only works with mic0 (mic0-br0-eth0) interface. It's possible to configure intel xeon phi scif0 interface with IPoIB and connect lustre inside Xeon Phi...
View ArticleRun-time error: undefined symbol: _intel_fast_memmove
Hello everyone,I am trying to do something rather exotic. I think I have reached a good point in the process, but now I got stuck.More specifically, I have a MATLAB program, part of which is very...
View ArticleTrouble installing OpenCL
Hello,While installing OpenCL runtime on my Mageia Linux system, I get the following errors:[root@localhost opencl_runtime_14.1_x64_4.4.0.117]# ./install-cpu.sh In case of failure, refer to release...
View ArticleXeon Phi
Hi,we are interested to buy this intel xeon phi:http://ark.intel.com/it/products/75798/Intel-Xeon-Phi-Coprocessor-3120P-6GB-1_100-GHz-57-corewe would like install this device on a HP PROLINAT DL 585 G7...
View ArticleSLURM for intel Xeon PHI?
Hello, I have a Slurm as queue manager for my cluster, where the Xeon Phi is connected. I wish to run Xeon Phi application with Slurm commands from the login host. Is it possible to compile SLURM for...
View ArticleCompilation error while using libmpi_mt
I'm facing the following error while compiling my application using mpiicpc. I'm using the compiler option -lmpi_mt, as well as -openmp flag for all files.x86_64-k1om-linux-ld: MPIR_Thread: TLS...
View Article64 bit element "duplication" inside zmm register for complex multiplication
Dear all,I am wondering about the best known method for implementing the following operation as part of a complex number multiplication. The input value is a zmm register which contains 4 double...
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