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Double buffering
Hi, I'm new here and I have a question right from the start.What I'm trying to do is double buffering on XEON PHI. This program seems to run fine if I remove signal/wait that is when I'm not doing any...
View ArticleMPSS True Scale support on RHEL 6.5
I am confused about OFED and True Scale adapter support in RHEL 6.5. Section 2.2 of the Users Guide says that native Phi applications running on True Scale systems are only supported through 6.3, but...
View Article_mm512_mul_epi32 not working?
#include <immintrin.h> #include <zmmintrin.h> // not needed but put here to show it is indeed included ... __m512i a,b,c; a = _mm512_mul_epi32(b,c); produces this error: undefined...
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Improving File IO performance on Intel® Xeon Phi™ Coprocessors
Authors: Ravi Murty and Rajesh Sudarsan Introduction The importance of file IO in HPC applications is well known. Large HPC applications read their inputs from files and write their outputs to files...
View Articlehow to set passwordless authentication in a cluster
Hi,I am configuring MIC boards on a Rocks cluster. I am encountering an issue about accessing MICs with passwordless authentication.Basically, my home directory is mounted to all machines of the...
View ArticleHybrid mode execution(Xeon and MiC)
Hi, I am trying to run a hybrid mode(Xeon and MiC) of my application using MPI. However I keep getting this error.HYD_pmcd_pmiserv_send_signal (./pm/pmiserv/pmiserv_cb.c:239): assert (!closed) failed...
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micflash keeps hanging
Hi,I've been struggling with MPSS installation for some time now.I started out in Ubuntu cross-compiling, but then gave up for obvious reasons. (didn't seem worth the trouble)I installed CentOS 6.4...
View Article在MIC上使用FFTW，运行出错The result of dlerror()
使用MKL和FFTW，编译能够勉强通过，会出现一些warnning。但是运行出现以下提示：Allocate array for input data On the sink, dlopen() returned NULL. The result of dlerror() is "/var/volatile/tmp/coi_procs/1/4793/load_lib/iccoutU3wQJi:...
View ArticleAbout vtune,
Hello All,I am big fan of Vtune, and it is the first time I use on MIC, and I have difficulty to extract result, especially Gflop/s and operational intensity. I follow the intel introduction of :...
View ArticleRunning Embree on Intel(R) Xeon Phi(tm) Coprocessor
These are the steps to reproduce a visual demonstration of the Crown model. These steps assume the following:You have an Intel® Xeon® processor-based system with OpenGL hardware graphics support and...
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Power Management: Policy? We don’t need no stinking policy!+
Yep. Here is another blog series from yours truly. Unfortunately, it will delay my long awaited – at least by me – discussion on measuring power.Here is a rough outline for the blogs:Introduction and...
View Articlecast __m512 to __m512d
Hey all, simple question: How does the cast operation _mm512_castps_pd work?A __m512 data type holds 16 floats i.e. 16 elements. Contrary to that a __m512d data type can only hold 8 elements -- so what...
View ArticleWhen would the L2_Data_Read_Miss_Cache_Fill happen?
Hi, guys I am trying to run a mpi program on the MIC using 240 threads, and I use the Vtune to analyze my program and find the L2_DATA_READ_MISS_CACHE_FILL/ L2_DATA_READ_MISS_MEM_FILL is too...
View ArticleExpected files seem to be missing
Hi,We are just getting started with mpss and I was trying to follow the instructions found at http://software.intel.com/sites/default/files/article/373934/system-admi... specifically the section on...
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Guangdong Mobile board room supplier
Perseverance, is Thousands of miles of levee gather one grain of sand stone, a little bit of accumulation, only the head but not the tail before and after but not spectacular; perseverance, ray ray is...
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The Chronicles of Phi - part 3 Hyper-Thread Phalanx – tiled_HT1 continued
The prior part (2) of this blog provided a header and set of function that can be used to determine the logical core and logical Hyper-Thread number within the core. This determination is to be use in...
View Article/usr and /usr/lib64 directories are world writable
Hi,I noticed that /usr and /usr/lib64 directories are world writable (mode 777), I'm using MPSS 3.1.2/4.I commented out following line from /opt/intel/mic/ofed/ofed.filelist and after reboot...
View ArticleMPSS version confusion 3.1.x vs 2.1/gold_update_3_5...
Maybe it's just me, but the MPSS versioning seems potentially confusing. I was recently updating my Compiler/VTUNE stuff from the "registration center" and saw that there's a new MPSS gold_update3_5...
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Configuration and Benchmarks of Peer-to-Peer Communication over Gigabit...
Hi all,We just have published our new white paper about point-to-point MPI communication between Xeon Phi Coprocessors in the...
View ArticleOffload error
I am trying to offload a part of code and using 3 arrays of dimensions (14000*3600)but this is giving some error related to system calls if I reduce the size of arrays to 1400*360 the code works fine...
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