On Wed, Aug 11, 2021 at 07:30:13AM -0700, Dave Hansen wrote: > On 8/10/21 8:21 PM, Jarkko Sakkinen wrote: > > +The following sysctl files can be found in the ``/proc/sys/kernel/sgx/`` directory: > > + > > +``total_mem`` > > + The total amount of SGX protected memory in bytes available in the system > > + available for use. In other words, it describes the size of the Enclave > > + Page Cache (EPC). > > I've been acting as if /proc is deprecated for new stuff. Shouldn't > this be going in sysfs? Are sysctl variables deprecated too? > I figured, at some point, someone is going to ask for NUMA statistics. > That would tend to point in the direction of us needing something in: > > /sys/devices/system/node/nodeN/ > > Maybe 'sgxinfo' or 'sgxstat' to go along with 'meminfo'. Is conetents of meminfo freezed or can a new line added, e.g. Node 0 SgxMemTotal: 32825700 kB If a new file is needed, I would name it as "sgxmeminfo" > But, we'll probably also end up needing some stats for other things. > Folks have, for instance, asked for a counter of the number of > instantiated enclaves. > > We could also use the drivers' namespaces: > > /sys/class/misc/sgx_enclave > /sys/class/misc/sgx_provision > /sys/class/misc/sgx_vepc > > although that is a bit awkward for reporting global resources like memory. I think these stats should be available when the driver is not enabled. It would be best to find a global solution for the long-run. /Jarkko
