OpenMP teams synchronization
Hi. I have a question about synchronization OpenMP thread teams. I would like to write code where only one threads team do caltulation at the time, eg: time 0 -> team 0 time 1 -> team 1 ... time...
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Repost: The delay of voltage/frequency scaling
Dear all, I'm reading the MPSS3.3 source codes.In \drivers\micpm\mic_cpufreq.c, there are some definitions as following: 1 #define K1OM_FREQ_DELAY 10 /* delay this many usecs, for each loop of...
View ArticleHow long does it take to allocate memory on the MIC?
I wrote some code to test the speed of allocating memory on the MIC. I find that allocte 4GB memory on MIC card need almost 14 seconds. Is this a normal speed?The test program is like THIS: 1...
View ArticleProblem for VTUNE analysis on MIC
Dear all,I am facing problem for doing VTUNE analysis for one of my application on MIC. i have already done VTUNE analysis of this application on xeon but want to do for xeon phi also to identify what...
View ArticleCan I see how '#pragma omp parallel for' translates internally
Hello,I'm writing a simple lookup function using OpenMP/C++ programming model.Below is the code block where I offload from host to my 5110P Phi device. #pragma offload target(mic:0) \ in(batch_size) \...
View Articlesimple questions
1) I have only one coprocessor, then "offload target(mic)" is same as "offload target(mic:0)"?2) I specify only fortran arrays inside "in/out/inout" for the offloaded openmp parallel region, do...
View ArticleSoftware Controlled Clock Facilities
Hi,I am trying to control the duty cycle of mic cores (through IA32_CLOCK_MODULATION), but I just found the following limited information in the Developer's Guide."The processor implements internal...
View ArticleOffload Transfer Speed
I conducted a experiemt to test data transfer speed#pragma offload target(mic) out(outImage:length(width*height) alloc_if(1) free_if(1)) in(img1,img2:length(width*height) alloc_if(1) free_if(1))...
View Articlempi program
is it possible to run an mpi program with processes on cpu and mic. for example, if I have two processes, say rank=0 and rank=1, is it possible to run rank=0 on cpu and rank=1 on mic? if yes, could you...
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CMAKE_AR xiar -qoffload-build
I add some offload codes for the package gromacs and use the cmake that the package requires build it.As we know, the commad for creating offload library: xiar -qoffload-build. But when I set the...
View Articleamplxe-cl arguments
I have a code on host with an offload region to mic, I wanted to profile it using vtune command line option. I am doing as follows:amplxe-cl -collect advanced-hotspots -target-system=mic-host-launch...
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Dynamic allocation problems on Xeon Phi
I am creating a simple matrix multiplication procedure, operating on the Intel Xeon Phi architecture.I am using, aligned data. However, if the matrices are allocated using dynamic memory...
View Articlempss 3.4 linux version support
https://software.intel.com/en-us/articles/intel-manycore-platform-softwa...states that Red Hat 6.2 is supported, but the readme.txt supplied as a URL there and included in the tar file says Red Hat 6.3...
View ArticleSMC bootloader flash fails
We have an Intel Xeon Phi 3120A for which we can't update the SMC Flash and SMC Bootloader flash. Any suggestions are greatly appreciated !First of all I'd like to mention that the blue LED is not...
View Articlemkl
I wanted to use the mkl fortran subroutines (for example, mkl_?csrmm, mkl_?csrsv, ...). Just wanted to make sure I do things right1) if I just run it on host. then I compile it as "ifort -openmp -mkl...
View Articlemeasure local and remote L2 cache latency
Hi All,I wonder anyone knows that how to measure the Xeon Phi's local and remote L2 cache latency in VTune (or any other available tools)?Thanks very much!
View ArticleIntel® Xeon Phi™ Coprocessor Applications catalog available
We now have an Intel Xeon Phi Applications and Solutions catalog at https://software.intel.com/en-us/articles/intel-xeon-phi-coprocessor-applications-and-solutions-catalog -- this is also accessible...
View Articlehelp understanding alignment report
Hello, I am having some issues trying to understand why I am not using aligned arrays in one of my subroutines. The code is shown below. I checked the alignment usingifort -align array64byte...
View ArticleDisable Turbo Boost and SMT for Xeon Phi
Hello,Is it possible to disable Turbo Boost and SMT for Xeon Phi?
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