VTune
Encyclopedia
Intel VTune Amplifier XE is a commercial application for software performance analysis for 32 and 64-bit x86 based machines, and has both GUI
and command line interfaces. It is available for both Linux
and Microsoft Windows
operating systems. Although basic features work on both Intel and AMD hardware, advanced hardware-based sampling requires an Intel-manufactured CPU.
performance. The new GUI can filter data based on a selection in the timeline.
Locks and waits analysis: finds long synchronization waits that occur when cores are under utilized.
Threading timeline: shows thread relationships to identify load balancing and synchronization issues. It can also be used to select a region of time and filter the results. This can remove the clutter of data gathered during uninteresting times like application start up.
Source view: Sampling results are displayed line by line on the source / assembly code.
Hardware event sampling: This uses the on chip performance monitoring unit and requires an Intel processor. It can find specific tuning opportunities like cache misses and branch mispredictions.
Performance Tuning Utility (PTU): PTU is a separate download that gives VTune Amplifer XE users access to experimental tuning technology. This includes things like Data Access Analysis that identifies memory hotspots and relates them to code hotspots.
Gui
Gui or guee is a generic term to refer to grilled dishes in Korean cuisine. These most commonly have meat or fish as their primary ingredient, but may in some cases also comprise grilled vegetables or other vegetarian ingredients. The term derives from the verb, "gupda" in Korean, which literally...
and command line interfaces. It is available for both Linux
Linux
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...
and Microsoft Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...
operating systems. Although basic features work on both Intel and AMD hardware, advanced hardware-based sampling requires an Intel-manufactured CPU.
Code Optimization
Intel VTune Amplifier XE assists in various kinds of code profiling including stack sampling, thread profiling and hardware event sampling. The profiler result consists of details such as time spent in each sub routine which can be drilled down to the instruction level. The time taken by the instructions are indicative of any stalls in the pipeline during instruction execution. The tool can be also used to analyze threadThread (computer science)
In computer science, a thread of execution is the smallest unit of processing that can be scheduled by an operating system. The implementation of threads and processes differs from one operating system to another, but in most cases, a thread is contained inside a process...
performance. The new GUI can filter data based on a selection in the timeline.
Features
Software sampling: works on x86 compatible processors and gives both the locations where time is spent and the call stack used.Locks and waits analysis: finds long synchronization waits that occur when cores are under utilized.
Threading timeline: shows thread relationships to identify load balancing and synchronization issues. It can also be used to select a region of time and filter the results. This can remove the clutter of data gathered during uninteresting times like application start up.
Source view: Sampling results are displayed line by line on the source / assembly code.
Hardware event sampling: This uses the on chip performance monitoring unit and requires an Intel processor. It can find specific tuning opportunities like cache misses and branch mispredictions.
Performance Tuning Utility (PTU): PTU is a separate download that gives VTune Amplifer XE users access to experimental tuning technology. This includes things like Data Access Analysis that identifies memory hotspots and relates them to code hotspots.
External links
- Intel® VTune™ Amplifier XE (product webpage)
- Intel® Parallel Studio XE (product webpage) includes Intel VTune Amplifier XE performance profiler.
- Intel Performance Tuning Utility (PTU) Experimental tuning technology for VTune analyzer users (product webpage)
See also
- List of performance analysis tools
- Intel Software NetworkIntel Software NetworkThe Intel Software Network is an international online program designed by Intel to encourage and support independent software vendors in developing applications for Intel hardware and software products...
(support and discussion) - AMD CodeAnalystCodeAnalystAMD CodeAnalyst is a GUI-based code profiler for x86-based machines. CodeAnalyst has similar look and feel on both Linux and Microsoft Windows platforms...