Stack Overflow
Stack Overflow

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.

182 questions
0
votes
4 answers

Find index of nearest in sorted vector

I wrote a C++ routine to find nearest double element in sorted array. Is there a way to speed up? There are two branches based on the value of boolean reversed, if reversed it is sorted in the decreasing order. void…
kiriloff
  • 25,609
  • 37
  • 148
  • 229
0
votes
1 answer

VTune using Windows embedded OS

I am wondering if it is possible to use VTune 2013 or VTune2015 using a Windows embedded operating system. I read on the release notes that "embedded editions not supported" but I would like to know if there is a way for example to collect data on a…
DOFHandler
  • 225
  • 2
  • 12
0
votes
1 answer

What causes spike in branch predictions Vtune

I am launching an application using VTune and profiling it. Once the test is run, I see a spike in branch prediction unit. To optimize my application, I need to figure out what part of the code causes this spike. Is there a way through VTune I can…
user782400
  • 1,617
  • 7
  • 30
  • 51
0
votes
1 answer

Intel VTune command line error

I am trying to use VTune command line to set maximum number of samples to be collected before the collection stops. For this I have using the -msc command but I get an error saying unknown command. The command I am using is : "C:\Program…
user782400
  • 1,617
  • 7
  • 30
  • 51
0
votes
0 answers

Intel VTune Sampling after certain period of time

I am new to VTune and was playing around with it. One thing that I was not able to figure out was how do I get multiple samples of the events after every 20 seconds and save them in a text file. For example, run an application using VTune and get…
user782400
  • 1,617
  • 7
  • 30
  • 51
0
votes
1 answer

VTune Amplifier XE 2015 architecural anaylsis

I recently downloaded the VTune Amplifier XE 2015 to profile applications. For analysis, I want to profile in terms of both architectural and micro-architectural events. I found that it is possible to get the micro-architectural analysis when…
user782400
  • 1,617
  • 7
  • 30
  • 51
0
votes
1 answer

What is causing the cache misses in my code?

I'm trying to optimise a part of code that is called within a parallel region (OpenMP). I did a memory access analyses with Intel VTune Amplifier 2015 and am a bit confused about the result. I repeated the analyses with optimization level O1, O2 and…
user3572032
  • 133
  • 14
0
votes
3 answers

How to find Cycles per instruction of an i7 processor

I was trying to see a CPI value of a program on a i7 processor with vtune amplifier XE 2011.(on win8 x64) according to the tutorial, viewpoint of Hardware Event Counts Hardware Event Sample Counts Lightweight Hotspots Hardware Issues will sow the…
wicky
  • 384
  • 3
  • 17
0
votes
1 answer

vtune function call count

What technique does the vtune amplifier 2015 uses to estimate function call count ? I know that it does not give accurate information. I thought , it uses call count = total clock cycles taken by function / clock cycles for single function run Is…
user2499666
  • 1
  • 1
0
votes
1 answer

How to adjust Qt Creator for VTune Amplifier in Linux (Ubuntu)

Intel VTune Amplifier does not show source code (only assembly) for C++ project from Qt Creator. How can i fix it?
Radon
  • 11
  • 2
0
votes
1 answer

Compiling nodejs with vtune and jitprofiling.h support

My only purpose is do profiling of JavaScript code under Node.js with vTune. I tried to follow the steps that appear under this post: Profiling Nodejs with vTune, but I have no luck. I use Debian 7 x86_64, and my version of vTune Amplifier XE is…
user3819881
  • 377
  • 3
  • 13
0
votes
1 answer

, Vtune Amplifier Error

Currently I'm using VTune analyzer in linux system to profiling java code. I generated report by attaching it to the running process. However, in top-down tree, I usually can see [Outside any known module] which took certain amount of time. When I…
Youngil Kim
  • 1
  • 1
0
votes
1 answer

Running VTune Amplifier 2014 for Android Systems on Windows using Eclipse

I am new to VTune Amplifier and I am developing an Android application on Intel Atom processor. When I try to run profiling I get the following error I am using Intel Vtune Amplifier 2014 for Android Systems. amplxe: Error: Cannot enable Hardware…
Harrisson
  • 255
  • 2
  • 21
0
votes
1 answer

-g flag changes runtime and compilation of program

I am writing a program that attempts to speed up a Top K filtering alogrithm using SSE and AVX SIMD instructions. I am compiling my program using icc with the flags -o3, -msse3, and -lrt, and the run-time comes out to ~30ms. However, when I put a…
user3665290
  • 1
0
votes
0 answers

What causes the retired instructions to increase?

I have a 496*O(N^3) loop. I am performing a blocking optimization technique where I'm operating 2 images at a time instead of 1. In raw terms, I am unrolling the outer loop. (The non-unrolled version of the code is as shown below: ) b.t.w I'm using…
quantumshiv
  • 97
  • 10
1 2 3
…
11
12