Intrinsic bad performance
Hi. I write aplication for Intel MIC witch doing stencil computation (5-point stencil) using 2D matrix. I would like to achieve good performance. I wrote code where 4 HW threads running on the same...
View ArticleStrange results on MIC
Hello, for my thesis I have run a simple code used to study a Lennard Jones system on a Xeon Phi coprocessor and I tried to vectorize it and study the variations on execution time. The machine I used...
View ArticleScif_send error??
Hello to you All, Strange message appeared when stoping the mpps service: (MPSS 3.3.1 in Centos 7)systemd: Stopping Intel(R) MPSS control service... Sep 23 10:21:18 localhost kernel: mic0: Transition...
View Articleoffload related
Hello,I had a conceptual question here, I have a program on the host that offloads data over to MIC; now, is it possible to have another program (completely separate) which is running on MIC that can...
View ArticleDo MKL FFT performs bad on xeonphi(MIC) compared to multicore - xeon server...
Hi,I have a written an application in which the same code is being on multi-core Xeon server CPU and Xeon phi 5110P(in offload mode). I noticed that when i use 512*512 size input array. i was getting...
View ArticleShutdownTimeout
Are there any negative ramifications of setting the ShutdownTimeout to 0 instead of a higher value such as 60 seconds? The documentation states thatSetting value to zero indicates to simply reset the...
View ArticleSMC inaccessible; Cannot get power or thermal readings
I am currently managing a CentOS host system with several Xeon Phi 5100P coprocessors. One of the coprocessors (mic0) is exhibiting issues with accessing the SMC buffers, making it difficult to (1)...
View ArticleDid anyone measure performance of offloaded FFTs on the MIC?
My initial experiments offloading FFTs into the MIC (using C language in Linux) give me approximately 9.3 GFLOPS of performance, judging by the reported [MIC Time] numbers when I set the environment...
View ArticleClik here to view.
Performance of TBB on Xeon Phi
Hi,I am experiencing a performance issue with TBB on Xeon Phi. On a server machine with two X5680, TBB runs faster than OpenMP from a group of benchmarks I have. This is also true with one of my other...
View ArticleMeet an error when using LAPACKE_dpptrf
I use LAPACKE_dpptrf in my program, the code is:int info = 0; #pragma offload target(mic) out(icfa_1:length(icfa_dim * (icfa_dim + 1) / 2) alloc_if(0) free_if(0)) { info =...
View ArticleOffload error: signal 11 (SIGSEGV) for simple code
This is my first post on the forum, so please be gentle. I've been experimenting with a Phi card for some parallel CFD solvers. Preliminary results are fine - however, I've encountered some interesting...
View ArticleWhich OFED for RHEL 7 + True Scale?
I thought we needed the Intel OFED (OFED+) for True Scale, but recent documentation indicates otherwise. Could someone please help me to navigate this:1) In the MPSS 3.4 User's Guide (...
View ArticleHelp with vectorization
Hello everyone, I have a subroutine that definitely has the computational load that could benefit from a MIC. The subroutine is being used in a molecular simulation. The idea behind the subroutine is...
View ArticleMPSS 3.4 released last week
Wanted to bring your attention to the fact that MPSS 3.4 was released last weekhttps://software.intel.com/en-us/articles/intel-manycore-platform-softwa...A blog that describes its key features can be...
View ArticleTickless
For any of who may have asked Intel for tickless support on Xeon Phi coprocessors, there is a preview tarball/examples now available for you to try - Previewing tickless support for Linux* on the...
View ArticleWebinar: Optimizing LAMMPS* for Intel Xeon Phi coprocessors - Oct 29
A new webinar has been scheduled. Details below: Optimizing LAMMPS* for Intel® Xeon Phi™ CoprocessorsWednesday, October 29, 2014 11:00 AM - 12:00 PM PDTLAMMPS* is a large scale atomic/molecular...
View ArticleDAPL ERR
Hii`m execute WRF in symetric mode in one coprocessor succesfully but obtain this error on two copprocessors. can help me?: [21] MPI startup(): shm and dapl data transfer modes [17] MPI startup(): DAPL...
View ArticleIntel Phi on Ubunt 14.04
Hi!I am the admin of a GPU cluster, and the OS of choice is 64-bit Ubuntu Server 14.04. It is rather strange that Intel provides Windows binaries sooner than they would port the RedHat implementation...
View ArticleVTune Amplifier 2015 with native application
Hi all,I'm trying to use the VTune Amplifier XE 2015 with a native code on KNC. Can you tell me if I can find a guide to the GUI with particular concern to the execution of native codes? I created a...
View Articlesep_mic_server
Hi, What is sep_mic_server? Is it a service, a process, or something else? What does it do, and how do I as a user ensure that it's properly deployed before firing up VTune? We are having trouble...
View Article