Communications between MICs and hosts
Hi,I am evaluating communications between MICs and host using MPI. I found that the bandwidth results are not bad between MICs, especially between two MICs that attached to different hosts (only...
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VTune multithreading on multicore
Hi guys,I am trying to run 8 different threads on 8 different cores. So my CPU time is greater than my elapsed time. One of the threads is taking a very long time when compared to the other 7. These 7...
View ArticleEnergy consumption big differences for idle energy consumption on CPU and...
I tried to test the idle energy consumption for 10 seconds on Xeon Phi 5110P and Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz energy consumption. I found there is a quite difference on total energy...
View ArticleBuilding a Native Application for Intel® Xeon Phi™ Coprocessors
IntroductionSome applications are well suited for running directly on Intel® Xeon Phi™ coprocessors without offload from a host system. This is also known as running in “native mode.” The purpose of...
View ArticleBooting a Non-Linux OS
I want to boot a non-linux OS on the Xeon Phi. Is there any documentation on that? From the MPSS User Guide:"The second part of the boot argument indicates to boot a Linux* image. It may also be set to...
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Performance BKMs: Introduction and Super-secret Intel Tools
At SC13 (Super Computing 2013)*, someone commented that Intel seems to have some super-secret set of tricks in its pocket, allowing us to optimize “far beyond those of mortal man”+. We don’t really...
View ArticleVTUNE and VPU hotspot analysis
I'm using VTUNE to look at the hotspots in my code. I'm down into the vector instructions and confused by a few things. I understand that VTUNE isn't a cycle accurate simulator, but why it is that I...
View ArticleSegfault when offload function and data into xeon phi (SIGSEGV)
Hi,I have a code running on the CPU and I offload a function, which is being called several times inside a nested loop, into Intel Xeon Phi to be accelerated. In addition to get good performance out of...
View ArticleCo-processor only fine. But Symmetric & Offload not work.
Hello, I want to generate xeon phi workstation using intel MPI.Thus, I've already set up xeon phi and run test code using below...
View ArticleThe difference in creating threads between Phi and GPU
Dear all,I heard that "GPU can create threads using hardware, one instruction creating one thread".Does Phi have similar support? For example, when I use OpenMP, can I use some features of Phi to...
View Articlehow to enable non-root ssh?
dear forum,i've just updated my old mpss to the latest 3.2, and found that now ssh requires root password. i'm wondering how to allow non-root users to ssh and scp.i checked the mpss documentations but...
View ArticleHave a beeping problem with new ram memory - 4gb.
i think its about performance of computer.Have a beeping problem with new ram memory - 4gb. beeping , and no display.Mother board:...
View ArticleXeon Phi causing PC to freeze
For some time now, my PC has been freezing periodically - about once every 2 days, the screen looks normal, but mouse, keyboard etc. do not respond and I have to hold the power key in to restart.By...
View ArticleHow to use gather operations on MIC
Hi i want to gather a some elements from a array whose indices are specified in "index". Here is the code i have written.#include<stdio.h>#include<stdlib.h>#include<immintrin.h>int...
View Articleibscif/Infiniband problems
Hello,I am having problems with the actual mpss 3.2 relase in combination with CentOS 5.3 and the Intel 7.2.2.0.8 OFED stack.The kernel version is 2.6.32-279-11.1 so I ahd to recompile the kernel...
View ArticleNetmask for external bridge not set correctly
I am trying to connect Xeon Phi coprocessors to an external bridge with a wider than default netmask. My bridge br0 on the host has IP 10.33.1.2 with netmask 255.252.0.0 (the first 14 bits set). When I...
View ArticleNFS set up with host Windows 7 Enterprise and MIC Linux
I want to share one directory between the host and one coprocessor.Since the support on the host side appears to be only for client, the coprocessor needs to be the server.There is plenty of...
View ArticleTBB's Dynamic Memory Interface Replacement in offloaded code
I would like to try replacing the memory allocator with TBB's scalable memory allocator as detailed here:http://www.threadingbuildingblocks.org/docs/help/tbb_userguide/Automical...I would like to do...
View ArticleSegmentation Fault when using mpirun -f option
Whenever I use the mpirun -f option to run MPI programs on the device, I get a segmentation fault.[user@node ~]$ echo mic0 > mic0.hosts [user@node ~]$ mpirun -perhost 1 -n 2 -f mic0.hosts ./hello...
View ArticleCan't build shared libraries via libtool
I'm trying to port a project as a native Xeon Phi application. The project depends on some third-party libraries (GLib, libxml2, libgmp), and I understand that I have to cross-compile these libraries...
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