KNL coprocessor, MPSS, hStreams
We received couple of KNL co-processor's along with a xeon processor from Intel. I have installed RHEL 7.3 and MPSS 4.3.2 Example commands works well - micinfo, miccheck, micctrl -s (Pass) [root@em64tn...
View ArticleUser Space Power and frequency control on Xeon Phi x200 (KNL)
Hi, I am using "cpupower frequency-set" command to change the minimum and maximum frequency and also the cpufreq governor for all cpus in xeon phi KNL platform, but when I query the cpu...
View ArticleAdjust batch size in Intel Xeon Phi Clusters?
Hi ,We have an architecture that lets us to deploy models in a distributed way over single servers with our own balancing policies but would be good to use clusters for training time to take advantage...
View ArticleHow to setup 4 Xeon Phi 7120P in a single node via Infiniband?
Dear all,I am new Xeon Phi user and we are budget limited to the Xeon Phi 7120P which is less expensive. We have a few Supermicro servers have 4 PCIe x16 slots and 2 PCIe x8 slots. I read the manual of...
View ArticlePhi as OpenCL Device on HPC clusters
I have a question on how to use Phi as OpenCL devices in HPC cluster. The HPC cluster I am using has 6 nodes, each node has one Intel CPU and two Phi's. Can I use MPI to fire up 6 processes, so that...
View ArticleNumber of Threads vs Number of Iterations
Hi,For 240 iterations on Xeon Phi, 240 threads give the best time, for 180 iterations, 180 threads give the best time, and similarly for 120 and 60. Shouldn't we expect that for even 120 and 180...
View Articlecore dump after vainfo on ubuntu 16.04 with MediaServerStudioEssentials2017R2
Hello,I want fix it , can you help me libva info: VA-API version 0.99.0 libva info: va_getDriverName() returns 0 libva info: User requested driver 'iHD' libva info: Trying to open...
View ArticleIntegrated Memory Controller (E5-2600v2 & E5-2600v3)
Dear Supporter,is there any information about the size of the buffers in IMC ? Unfortunately, I could find it in the docs.Best regards,Dmitry
View ArticleSSH access for the Xeon Phi coprocessor
Hi,I've installed the last version of MPSS and I lost connectivity with the coprocessors. My steps to recover access were:service mpss stopmicctrl --userupdate=nonemicctrl --sshkeys=root mic0micctrl...
View ArticleCompile KNC coprocessor code with KNL host processor
Dear All,Sorry advance if such similar post is an old topic!I am trying to compile some existing KNC coprocessor code with KNL host processor using Parallel Studio 2017 but encountered the errors...
View ArticleBuilding lustre 2.8 client with mpss 3.8.1
Hi, I'm trying to follow steps similar to those for mpss-3.3/3.4 that are posted in the forum. I need IB (ofed) support.https://software.intel.com/en-us/blogs/2014/11/06/lustre-on-intel-xeon-p...For...
View ArticleXeon Phi x200 - 10 cores are offline. Bad CPU or BIOS config problem?
Hi everyone,I am testing out the Ninja DAP platform with Intel Xeon Phi 7210 64-core MIC processor. After configuring CentOS 7.3, I ran "lscpu" command. Results of the command show that 10 physical...
View ArticleOpenMP Accelerator Model - signal 11 (SIGSEGV)
Hello,currently I am working with OpenMP Accelerator Model and I would like use OpenMP offload for executing my application on KNC coprocessor. In my application I use #omp target data region to...
View ArticleIntel Xeon Phi (codenamed Knights Landing) energy consumption
Hi,I am looking for a way to measure the energy consumption of the Knight Landing (co) processor. In the previous version of the Xeon Phi (Knights Corner) I was able to measure the energy consumption...
View ArticlePerformance of kmp_affinity explicit on Intel Xeon Phi KNC
Hello,I am a new MSc student working on Intel Xeon Phi KNC. For my current project, I am running NAS parallel benchmark BT on xeon phi coprocessor with two different affinity patterns using...
View ArticleKNC to KNL - 2x Slower Performance - Same Code
We have an application that's currently running great in native mode on the KNC platform.We now have a KNL system for R&D and have recompiled our native KNC application for the KNL platform. When...
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CentOS 7.3 fail to build ofed-mic with MPSS-3.8.1
Dear all,I am trouble installing ofed-mic in CentOS 7.3 with default kernel. Linux node09 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/LinuxI did my best to follow...
View ArticleLVM disk io slow on KNL 7250 with CentOS 7.3
We recently found the disk io on LVM partition is very slow on KNL 7250 with CentOS7.3. The disk is 800G SSD with SATA6, xxpsl is installed and MCDRAM is set to cache mode. Any thing wrong?/dev/sda1:...
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Vtune bandwidth calculation does not match STREAM benchmark output on KNC
Dear Intel Forum Gurus,I am practicing Vtune by using the Vtune 2016 GUI to measure the bandwidth of the STREAM benchmark on KNC 5110P. I compiled stream.c with the following options:icpc -mmic -O3 -g...
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Offload memory leak with v17 compiler
Apologies if this has been covered elsewhere.I am seeing a small host-side memory leak per offload invocation with the 17.0.1 compiler. Is this a known issue? I haven't managed to track down 17.0.2...
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