Stack Overflow
Stack Overflow

Questions tagged [intel]

For issues related to Intel semiconductor chips and assemblies, Intel architectural features and ISA extensions, and Intel chips micro-architecture.

Intel Corporation is an American multinational semiconductor chip maker corporation headquartered in Santa Clara, California, United States. Intel is the inventor of the x86 processor architecture and makes central processing units, motherboard chipsets, graphic processing units, network interface controllers and much more devices related to communications and computing.

In addition to their hardware offerings Intel also produces a variety of software including compilers, libraries for mathematical computation(Intel MKL), threading(OpenMP, Intel Performance Primatives, Threading Building Blocks), parallel communication(MPI,OFED/True Scale Infiniband Stack) and several other products included in the Intel Parallel Studio toolkit. In addition to these offerings which are widely used in HPC Intel also produces software for datacenter management and is one of the most prolific contributors to the Linux kernel.

This tag should be used for questions about Intel hardware and software.

The x86 and/or x86-64 tags are better choices for questions about assembly programming for the architecture, rather than things like performance tuning specifically for Intel's implementation of x86.

Useful links

Related tags

3529 questions
1
vote
1 answer

Does Intel binary run faster than arm64 binary on M1 MacBook?

I did a small benchmark on my M1 Macbook and I got a strange result. Intel binary runs faster than arm64 binary. What is wrong with my experiment? $ arch arm64 $ make arch -x86_64 cc fib.c -o x86.out arch -arm64 cc fib.c -o arm64.out file…
anonaka
  • 85
  • 8
1
vote
1 answer

Intel Iris Xe Graphics crashing system. What might be most common issues?

Direct3D implementation on i5-1135G7 2.4GHz 8GB Ram with Iris Xe. OpenGL may have similar issues. I'm hoping someone has ideas on most common issues to work around dealing with new Intel Iris Xe Graphics. Our app enumerate the adapters, devices,…
Robert
  • 658
  • 7
  • 11
1
vote
0 answers

Why can't I use all LLC space as expected?

I want to monitor and allocate LLC space usage using Intel RDT. I wrote a program which will cause 100% cache miss as I expect. My machine's LLC size is 30.25 MB, and cache line size is 64 bytes. So I access a matrix column by column like so: int…
J.Xin
  • 41
  • 4
1
vote
1 answer

Intel HPC Library : xgboost_activate.sh:16: = not found

I have Conda installed with openAPI (Intel HPC library) on my Debian 10 Buster amd64: $ whereis conda conda: /opt/intel/oneapi/intelpython/python3.7/bin/conda /opt/intel/oneapi/intelpython/python3.7/condabin/conda When I launch $ conda activate I…
user1773603
1
vote
1 answer

Unable to start Virtual machine after installation

Unable to start Virtual machine after installation of vm and ubuntu iso file with - Error while powering on: This host supports Intel VT-x, but Intel VT-x is disabled. Intel VT-x might be disabled if it has been disabled in the BIOS/firmware…
pradeep
  • 29
  • 1
  • 2
1
vote
1 answer

How and when host CPU state is saved in the VMCS host-state area?

I'm trying to understand the basics of how Intel VMX/VT-x works. In the Intel Software Developer Manual it says this about VMCS: The VMCS data are organized into six logical groups: Guest-state area. Processor state is saved into the guest-state…
davide ferrè
  • 67
  • 8
1
vote
0 answers

Intel Virtualization (VMX/VT-x) guest general purpose registers

I just started learning about HW-assisted virtualization and read about how Intel VMX/VT-x works at a high level, but there are some things that are not clear to me and I hope you can help me to understand better. I've already found this question…
davide ferrè
  • 67
  • 8
1
vote
1 answer

Issues after installation of oneAPI intel ToolKit on Debian 10

I have just install oneAPI Base Toolkit and HPC toolkit. As it is indicated into doc, I have put into my ~/.zshrc : source /opt/intel/oneapi/setvars.sh Now 2 problems occur : First, when I open a new terminal, I have systematically the long message…
user1773603
1
vote
1 answer

FFTW3 in Intel compiler: Anything special?

This snippet of code reads in a bit of unformatted, double precision data, and returns a real FFTW on it: #include #include #include #include int main() { int i, fdin; int count=128; static…
bob.sacamento
  • 6,283
  • 10
  • 56
  • 115
1
vote
0 answers

Compiling the C++ code with the processor flag makes the code slower (intel compiler)

I am doing some profiling and performance is important for me (even 5%). The processor is Intel Xeon Platinum 8280 ("Cascade Lake") on Frontera. I compile my code with -Ofast flag, in Release mode. When I add -march=cascadelake, the timing gets…
Abaris
  • 181
  • 1
  • 10
1
vote
2 answers

Assembly why lea is fast?

I had a conversation with my professor and he said: leaq (%rax,%rax,8) Is faster than: imulq $9, %rax I asked him why (in both cases we are doing multiplication with nearly same numbers) and he said we won't get into that. Can Someone help me…
user15563851
1
vote
1 answer

Is the L1-Dcache the ultimate data cache and is DSB also a cache that can be simulated by gem5?

I wonder if the L1-Dcache is the ultimate cache that data comes from. Because I know for i-cache, there is a DSB which is even closer to CPU which could be seen as L0-icache. Also, I am interested in what hardware changes could influence DSB's…
yeehaw
  • 159
  • 2
  • 11
1
vote
1 answer

Issues with installing librealsense with Balena. Unable to locate file after make install?

I've been trying to setup librealsense on my Raspberry Pi4 using Balena. My docker file looks like: FROM balenalib/raspberrypi3-ubuntu:xenial-build RUN sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y RUN sudo apt-get…
ddiddi
  • 11
  • 1
1
vote
2 answers

What is the latency of `clwb` and `ntstore` on Intel's Optane Persistent Memory?

In this paper, it is written that the 8 bytes sequential write of clwb and ntstore of optane PM have 90ns and 62ns latency, respectively, and sequential reading is 169ns. But in my test with Intel 5218R CPU, clwb is about 700ns and ntstore is about…
dangzzz
  • 179
  • 7
1
vote
3 answers

openvino/ImportError: DLL load failed: Le module spécifié est introuvable

I'm working with intel's openvino 2020. I get this error I searched and tried a lot of solutions online, but It didn't work. and honestly, I'm new to working with python, openvino. So I don't really understand the error. this is the error: Traceback…
Aya Abidi
  • 11
  • 4
1 2 3
…
99
100