A data processing system performs a multithreaded performance benchmark
with a rampup interval and a rampdown interval. The master thread signals
a start test event and begins the rampup interval. After the rampup
interval, the master thread signals a start measurement event. In
response to the start measurement event, the worker threads record the
units of work they complete. After the measurement interval, the master
signals the workers to stop measuring, but to continue running. This
begins the rampdown interval. After the rampdown interval, the master
thread signals a stop test event. The rampup and rampdown intervals are
long enough to ensure that measurements are not recorded during skew
intervals. Thus, thread skew does not impact the results.