Limitations on OpenMP Profiling

Collecting OpenMP data during the execution of the program can be very expensive. You can suppress that cost by setting the SP_COLLECTOR_NO_OMP environment variable. If you do so, the program will have substantially less dilation, but you will not see the data from slave threads propagate up to the caller, and eventually to main()(), as it normally will if that variable is not set.

A new collector for OpenMP 3.0 is enabled by default in this release. It can profile programs that use explicit tasking. Programs built with earlier compilers can be profiled with the new collector only if a patched version of libmtsk.so is available. If this patched version is not installed, you can switch data collection to use the old collector by setting the SP_COLLECTOR_OLDOMP environment variable.

OpenMP profiling functionality is available only for applications compiled with the Sun Studio compilers, since it depends on the Sun Studio compiler runtime. For applications compiled with GNU compilers, only machine-level call stacks are displayed.