Use this tag to ask questions about Intel® VTune™ Profiler, which is an advanced performance profiler to find and optimize performance bottlenecks across CPU, GPU, and FPGA systems.
Questions tagged [intel-vtune]
182 questions
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intel® VTune™ Amplifier XE 2013 Unknown source file
I have the unknown source file in my report which make me impossible to fine the correct loop to analyze my report
I want to show the source code with the vtune analyze, however if i compile the c and get the execute file. When i try to analyze the…
keivn
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1 answer
Not able to set processor affinity
I'm trying to implement this code on a 8 core cluster. It has 2 sockets each with 4 cores. I am trying to create 8 threads and set affinity using pthread_attr_setaffinity_np function. But when I look at my performance in VTunes , it shows me that…
quantumshiv
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Intel Vtune: Power driver not accessible
I'm trying to run Intel vtune power analysis on intel(R) Core(TM) i7-3632QM CPU running Ubuntu 13.04 i keep getting "Power driver is inaccessible. Make sure the driver is installed and you have permission to access it." I tried building and loading…
FrancFine
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VTUNE results of CPU usage and Concurrency Histogram
In Vtune results what the numbers 0,1,2 (and 3) actually represent ?
What is the meaning of Blue bar over 0?
gpuguy
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Why do we need debug information during profiling using Vtune?
When we profile an application using VTune, I understand that the application should be compiled in Release mode, so that it has only relevant code and no additional code for debugging or something else. But following this article, I notice that it…
gpuguy
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Which is better way of profiling using VTUNE: standalone or integrated with MSVC
I am getting certain errors while running VTUNE stand alone, but every thing works fine if I run it from MSVC IDE.
Will there be any reporting inaccuracy if I run VTUNE from inside the MSVC?
gpuguy
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1 answer
VSPerf VS2010 and other profiling tools not picking up pdb
trying to profile with VSPerfCmd (VS2010 profiler), and also with Intel VTune Amplifier XE 2013: some results are available, for VsPerfCmd in .vsp file. However, profier is not picking up pdb. no code is available for some parts of the…
kiriloff
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Vtune analyzer with mingw
I am using MinGW for the 64 bit platform to compile a simple c++ test application:
g++ -g3 -c test.cpp
g++ test.o -o test
With the -g3 flag test.exe should now contain all necessary symbol information for profiling it... is this correct?
When I…
Constantin
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3 answers
Intel VTune Installer doesn't launch properly on my Windows 11 machine
I'm trying to install VTune on my machine (I have windows 11 (x64), 8GB of RAM with Intel I7), however the installer gives me this message (see image attached) and when I click continue, the window pops out and quits and so it doesn't get installed…
محمد خير الخلق
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1 answer
multilevel SSH connection with VTune Amplifier
How can I connect to multi-level remote host using Intel V-Tune Amplifier.
I have two host (Host1 and Host2). I can login to Host2 only via Host1 (as there are security involved to restrict direct connection to Host2).
Intel V-Tune Profiler provides…
user2008585
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1 answer
Advanced hotspots analysis by Intel Vtune Amplifier XE2016 of a VS2015 console application not working
When executing the Intel "Advanced Hotspots, stacks and context switches analysis" (or higher) of my simple (a few lines) VS2015 console C++ (native) application, its processing hangs and Windows restart is needed, see the sample solution and screen…
user1969843
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1 answer
Poor time utilization shown by vtune but the issue is unknown
Analyzing a packet processing application with Intel Vtune.
Poor time utilization in just this instruction
add $0x100, %r8 (7%)
Poor time utilization in a single if check
if(unlikely(VALUE == some_value)
This some_value is uint16_t and is passed…
Hooli
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Intel VTune / Memory Leak Detector -- what additional feature does Valgrind provide
Consider following code:
int main() {
for (int i = 0; i < 10; i++)
int *a = new int[10];
}
Intel VTune Profiler/Inspector is now a free suite from Intel available for both Windows as well as Linux (previously, the full version was only…
Tryer
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_kmp huge overhead and spin time for unkown calls in OpenMP?
I'm using Intel VTune to analyze my parallel application.
As you can see, there is an huge Spin Time at the beginning of the application (represented as the orange section on the left side):
It's more than 28% of the application durations (which is…
cplusplusuberalles
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