In this pull request, I am changing the CPU_NUM value back to nproc command which results the correct value of '4' in DC02, instead of the incorrect '12'
The maximum number of tasks BitBake should run in parallel at any one time. If your host development system supports multiple cores, a good rule of thumb is to set this variable to twice the number of cores.
Therefore, I am multiplying CPU_NUM by 2 for BB_NUMBER_THREADS.
However, for PARALLEL_MAKE and every other parallel setting, the documentation says they all default to the number of cores. So no need to override them.
The Good:
This will cause the bitbake command with cache to complete around 10% faster.
This will cause running multiple bitbake runs to add less pressure on the server.
This is similar to https://github.com/MistySOM/rzg2l/pull/37