Longer calls, along with high contention can be used to force timeouts to occur. Iterations per barrier. Specifies the number of iterations performed by each thread until a synchronization barrier is forced with other threads, forcing it to wait for other threads to reach the same number of iterations. Setting to a value greater than the number of iterations per test effectively disables barriers. Threads per barrier Specifies how many threads are forced to synchronize at each barrier point.
Greater numbers cause more threads to wait for each other at barriers.
Setting to 1 means that a thread only has to wait for itself, which means not to wait at all. Timeouts Specifies the duration of timeouts used in timeout mode. A value of zero results in pure spin-loops. This is implemented by having the producer do all, half, or none of the actual calls to update, in addition to adding elements to channel. To scaffold all this, the RNG class is defined in layers.