I am running MPSS 3.5 and OFED+ 22.214.171.124.12 and have 2 nodes with Phi cards and Qlogic. I believe that if I set I_MPI_FABRICS to use either tcp or tmi everything works, but I've heard that dapl is faster and I'm having problems getting that to work everywhere. It works when MPI tasks are either only on the hosts or only on cards in a single host. If there are tasks on the host and a card it appears to have problems connecting to the IP address that is added during the ofed-mic service startup (192.0.2.0/24).
I am trying to allocate a memory in MIC with _Cilk_shared_malloc. The following is the code, which raise some errors.
I am using the offload programming model on Xeon Phi, and in the code which I want to offload to the Xeon Phi, I need to use some math functions like pow() function, however when I compile the code ,there are some errors during link stage. the error show that it seem the compiler can not find the reference of the pow function. so which path environment should set ?
Since I haven't seen a notification of this elsewhere, the ever knowledgeable Jim Dempsey (QuickThreadProgramming.com) just published one of his great technical articles entitled, "Elusive Algorithms – Parallel Scan".
I believe this was an outgrowth of another discussion on the forums, "how to perform inclusive scan in C cilk".
Compiling OFED with with phi and --all fails when compiling compat-rdma. Compile without the "--with-xeon-phi" option works. ./install.pl --with-xeon-phi --all # cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.1 (Maipo) # uname -r 3.10.0-229.1.2.el7.x86_64 rpm -qi mpss-sdk-k1om-3.5-1.x86_64 Name : mpss-sdk-k1om Version : 3.5 Release : 1 Architecture: x86_64 Install Date: Thu 09 Apr 2015 10:00:28 PM CDT Group : base Size : 484359036 License : various Signature : DSA/SHA1, Thu 02 Apr 2015 06:57:59 AM CDT, Key ID 718a1696ef328191
I'm trying to setup a new system:
2 Intel Xeon Phis:
Coprocessor Stepping : B1
Board SKU : B1PRQ-31S1P
MPSS 3.5 and Scientific Linux 7.1
Could someone please tell me if this machine is compatible with this model of Xeon Phi?
We bought a workstation based on this list:
Once installed the card does not appear in lspci nor in BIOS.
Thanks in advance!
I try to use MKL to generate lots of random data every time on Xeon phi, but the performance is very bad comparing the performance on Xeon CPU.(E5620) .
The attachment is the original code, and the compile option for Xeon Phi is -O3 -mkl -mmic. and it takes about 115 seconds, however when I run it on Xeon CPU,it only takes 3.5 seconds. I do not know why the difference is so much. Is the way in which I use the Xeon Phi wrong or the real performance on Xeon Phi is bad?