Handling dlopen Events in Parallel

TotalView’s default behavior is to handle dlopened libraries serially, creating multiple, single-cast client-server communications. This can degrade performance, depending on the number of libraries a process dlopens, and the number of processes in the job.

To handle dlopened libraries in parallel, use the TV::dlopen_read_libraries_in_parallel and its related command line option -dlopen_read_libraries_in_parallel.

This sets the state variable to true. Placing this dset command in the tvdrc file ensures that all instances of TotalView launch with this option:

dset TV::dlopen_read_libraries_in_parallel true

To set this option on an individual instance of TotalView, use the command line option when you start TotalView:

totalview -dlopen_read_libraries_in_parallel