qclib provides a C API for extraction of system information for Linux on z
Systems.
For instance, it will provide the number of CPUs
* on the machine (CEC, Central Electronic Complex) layer
* on the PR/SM (Processor Resource/Systems Manager) layer, i.e. visible to
LPARs, including LPAR groups in z/VM hosts, guests and CPU pools
* in KVM hosts and guests
This allows calculating the upper limit of CPU resources a highest level guest
can use. For example: If an LPAR on a z13 provides 4 CPUs to a z/VM hyper-visor,
and the hyper-visor provides 8 virtual CPUs to a guest, qclib can be used to
retrieve all of these numbers, and it can be concluded that not more capacity
than 4 CPUs can be used by the software running in the guest.
This package provides the development libraries and headers for qclib.
