This section discusses new features and updates to the OpenMP API.
The default number of threads for OpenMP and autopar programs is a multiple of the number of cores_per_chip. The algorithm for computing the number of threads starts with cores_per_chip, then it checks successive multiples of that number and picks the highest one that does not exceed 32 and does not exceed the number of cores on the machine.
For more information about OpenMP, see Oracle Developer Studio 12.5: OpenMP API User’s Guide.