Use Overview Analysis to get high level performance snapshot of an application, identify hottest functions and it’s inclusive and exclusive elapsed times, CPU utilization of the threads, and Wait time analysis of the application threads.
Overview Analysis traces the functions defined in the application whose size is more than or equal to 128 bytes by default. It collects the start time, end time of the function, callees function time, and stores the data in raw file for further processing.
Overview Analysis traces GPU offloading which includes kernel launch, kernel execution and data transfer for GPU intensive applications.
Overview Analysis uses the User mode sampling and tracing approach, and it is
supported only in Linux and if application is using libc and
libpthread then these libraries should be linked dynamically.
Reference