3,578 questions
0
votes
1
answer
61
views
Why does my CPU's efficiency core have a lower core-to-core latency?
I used https://github.com/nviennot/core-to-core-latency to measure my CPU's (Intel(R) Core(TM) Ultra 7 268V) core-to-core latency and these are my results:
~/Developer/core-to-core-latency main
❯ ...
- 364
0
votes
0
answers
37
views
What is the cause of x86_64 CPU do not receive the interrupt after switching into user mode?
I want to switch into user mode from kernel mode by
switch_to_user_mode:
cli
mov ax, 0x23
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
push 0x23
push rdi
pushfq
...
- 466
-2
votes
0
answers
62
views
intel compiler and <mkl.h>
In the framework of a course about high performance computation, i have to use the intel's compiler for c++ (icx now and icpc before i guess) and the library <mkl.h> from C.
My compiler does ...
- 1
0
votes
0
answers
41
views
Meaning of Q in SSE instruction mnemonics
I'm learning SSE programming and I come across this instruction:
(V)CVTDQ2PS—Convert Packed Doubleword Integers to Packed Single-Precision Floating
Point
I thought CVT means convert, D means Dword, ...
- 347
-1
votes
0
answers
9
views
Microphone and Camera Issues After Installing FFmpeg [migrated]
After installing FFmpeg using Winget on my Windows laptop, my microphone started capturing a lot of noise it doesnt work and my camera began flickering.
The only fix that worked was performing a full ...
- 1
0
votes
1
answer
76
views
P and E cores when doing multithreaded programming
When you split an algorithm/function/whatever to run as separate threads, let's say I launch 8 threads, you don't know that each thread is going to run on a separate one of my 8 cores, as it's the job ...
- 15.1k
0
votes
0
answers
19
views
Which type of Intel 3rd generation processors(Icelake) has xcc micro-architecture
The picture or the website of Intel don't tell the differences between these types of Icelake processors in micro-architecture(XCC or HCC).
I hope somebody can tell me whether the 4314 processor ...
- 1
0
votes
0
answers
68
views
Docker Desktop Not Responding on macOS (Intel) After Multiple Reinstalls
Body:
I am facing an issue with Docker Desktop on my MacBook (Intel) running macOS [mention your macOS version]. Despite multiple attempts to install, uninstall, and reinstall Docker, the app fails to ...
1
vote
0
answers
94
views
How to waste a few CPU cycles without causing any memory accesses
I'm looking for a low-overhead method for my program to stall a few cycles on an Intel CPU, without causing memory accesses or side effects that could alter the CPU components' data (e.g. no usleep())....
- 110
0
votes
1
answer
27
views
Recompiling the Basic Extension (e.g., instrumentation-tracer-tool) from Source Code in Intel Simics
I want to re-compile the basic extension (e.g., instrumentation-tracer-tool) from its source code in Simics 6.0.185. After installing with ispm packages, I can see a Makefile in the instrumentation-...
0
votes
0
answers
23
views
How many independent threads can be run on a single XVE of Intel Xe2 core?
I have a kernel with a highly divergent control flow, which is not suitable for parallelizing by mapping into individual SIMD lanes. I would like to know how many independent threads, each with its ...
- 8,235
0
votes
0
answers
170
views
Sriov VF using IAVF PMD stops receiving traffic after restarting RX/TX queue in a DPDK application
I have a problem with stopping/starting VF RX/TX queues from our DPDK application. I am using a patched DPDK 22.11.1 and RedHat 4.14 kernel.
Traffic flows correctly until the first time we stop/start ...
1
vote
1
answer
85
views
What do the letters in port usage on uops.info mean?
What do the letters in the ports of the uops.info table mean?
For example ADD (R64, R64) lists 1*p0156B at ports. The documentation says 1*p0156 means one microinstruction can be executed at ports 0, ...
-1
votes
1
answer
94
views
CMake with vcpkg - Including libbid.lib (intel math lib) as dependency for external source code (TWS API)
I'm working on a CMake C++ project using vcpkg to manage graphic package imports. The goal is to automate stock trading using the TWS API from Interactive Brokers (IBKR). Below is the current project ...
0
votes
0
answers
24
views
Issue with Conda Package Installation - Intel Channel Persistence
Environment
Using Miniconda for Python package management
Current Situation
All configured channels are visible in conda info output and Intel is removed:
During package installation, Conda ...
- 647