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Questions tagged [intel-vtune]

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.

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Threading analysis in Vtune hangs at __kmp_acquire_ticket_lock

I am currently benchmarking a project written in C++ to determine the hot spots and the threading efficiency, using Intel VTune. When running the program normally it runs for ~15 minutes. Using the hotspot analysis in VTune I can see that the…
arc_lupus
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oneAPI successfully installed but vtune won't run

I'm using windows' ubuntu terminal, which i'm sure in the problem, but I've installed the linux version of intel's oneAPI on the ubuntu terminal. its says Intel's oneAPI base toolkit has been installed, but typing either vtune-gui or…
plotka
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VTune -- viewing results from Linux on OSX with source code

I'm running VTune on Linux and collecting results fine. I'm able to open the VTune gui over X and see the results correctly. However, it's slow -- so I'm trying to view the results using my VTune for OSX client. My understanding from the docs is…
Kulluk007
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Timings reported by profiler vs true timings - why the discrepancy?

I have two chunks of code that do the same operation. One chunk written by myself, the other written by a third party. They are both compiled into a single executable. The third party code appears to be able to do its job much faster than mine. It…
Mick
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Cannot install vtune amplifier command-line interface

I try to install vtune command line interface on a target machine following the instrument https://software.intel.com/en-us/vtune-amplifier-install-guide-windows-installing-command-line-collectors. But get the error popup like the screenshot below.…
Tinggo
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Low 'Average Physical Core Utilization' according to VTune when using OpenMP, not sure what the bigger picture is

I have been optimizing a ray tracer, and to get a nice speed up, I used OpenMP generally like follows (C++): Accelerator accelerator; // Has the data to make tracing way faster Rays rays; // Makes the rays so they're ready to…
Water
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intel_pt data cannot be imported properly into Intel VTune 2018

I am using Intel VTune 2018 to profile and derive the control flow dependencies by making use of the Intel_PT PMU under the system: Kernel: 4.15.0-13-generic, 64bit Ubuntu CPU: Intel® Core™ i7-7820X @ 3.60GHz × 16 I started with the following…
A.shahnejat
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Intel Vtune Amplifier 2018 Update 2 Results Database Not Created

I'm trying to profile a piece of C++ code compiled using VS2017 more specifically v141 build tools, its takes about 2.5 min to run in the release configuration. My problem is no matter what I do when I try to profile it with vtune the results…
Tiago Magalhães
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Runtime of callee functions not added to caller function in vtune profiling

I am using Intel's Vtune for runtime profiling of my code. (Specifically hotspot analysis mode to identify time-consuming functions). After the application completes and vtune generates its reports, i open the GUI "ample-gui" to visualize the…
ANKIT THAKUR
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Intel VTune unable to locate all Windows debug symbols

I have created a project with CMake, which I now tried to profile using the trial version of Intel VTune together with Visual Studio 15. I set the Windows debug symbol server in Visual Studio, but VTune is unable to find all the symbols. My project…
Johannes Stricker
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Can VTune work without sampling driver and perf?

The SEP drivers weren't built and weren't installed: hekto@ubuntu:/opt/intel/vtune_amplifier_xe/sepdk/src$ sudo ./insmod-sep -q pax driver is not loaded. socperf2_0 driver is not loaded. sep4_0 driver is not loaded. vtsspp driver is not loaded. The…
HEKTO
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Where is integer addition and subtraction event count from intel Vtune?

I am using intel VTune to profile my program. The CPU I am using is IVY Bridge. All the hardware instruction event can be found here: https://software.intel.com/en-us/node/589933 FP_COMP_OPS_EXE.X87 Number of FP Computational Uops Executed this …
Yun Li
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How to interpret operation names such as FP_COMP_OPS_EXE.X87

I use Intel VTuen to collect instructions of a program and I get results like…
Yun Li
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How to profile the number of additions, mutltiplications etc. with vtune

I am able to profile my C++ library's instruction counts with Vtune using the 'INST_RETIRED.ANY' event. What analysis types or events can be used profile in terms of number of integer/floating point additions, multiplications, divisions etc?
harish
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Possible bug in vtune on Xeon Phi

I ran vtune on a xeon phi core and obtained a CPI of 0.777 for a single threaded benchmark. However, this seems really unlikely to be true because the theoretical maximum CPI is 1.0 for a single thread. (search for "Theoretical CPI" on…
user2722716
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