The dworker command inserts or removes a thread from the workers group.

If number is 0 or false, this command marks the TOI as a nonworker thread by removing it from the workers group. If number is true or is a positive value or boolean is true, this command marks the TOI as a worker thread by inserting it in the workers group.

Moving a thread into or out of the workers group has no effect on whether the thread is a manager thread. Manager threads are threads that are created by the pthreads package to manage other threads; they never execute user code, and cannot normally be controlled individually. TotalView automatically inserts all threads that are not manager threads into the workers group.