Profilers

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Revision as of 13:05, 12 April 2012

Sun Studio performance tools

Intel VTune

Section contributed by IICT-BAS

Intel VTune Amplifier is a performance analysis application for both 32-bit and 64-bit x86 based machines. It can profile C, C++ and Fortran code and can be used for both serial and threaded application. Additionaly VTune is available as an MPI-enabled version.

To use VTune you must compile your code using the -g compiler flag in order to generate the debug information needed for VTune.

VTune provides several tools for analysis:

Software sampling

A feature limited only for x86 compatible processors. It can be used to generate the time spent on different locations along with the call stack, thus identifying hotspots that which require optimization.

Locks and waits analysis

Used for locating long synchronization waits. Useful for detecting underutilization.

Threading timeline

A feature that allows the indetification of synchronization issues.

Source view

Visualizes the sampling times results mapped to the the source code. Can also be drilled-down to assembly code.

Hardware event sampling

A feature limited to Intel processors, because it uses the chip performance monitoring unit. Quite useful for minimizing cache misses and branch mispredictions.

PTU (Performance Tuning Utility)

An additional application, that grants access to experimental performance analysis tools.

D8.2 related materials

http://hpseewiki.ipb.ac.rs/index.php/Optimization_techniques_for_scalability#Profilers