> > " Non-CPU agent RDT uses the RMID and CLOS tags in the same way that they are used for CPU agents." > > As I understand AMD uses a single specific (the highest CLOSid supported by L3) > CLOS that is then reserved for IO allocation. While both Intel and AMD technically > "uses CLOSid", it is done differently, no? > > Specifically, is this documentation introduced in patch #5 accurate for Intel? > + The feature routes the I/O traffic via specific CLOSID reserved > + for io_alloc feature. By configuring the CBM (Capacity Bit Mask) > + for the CLOSID, users can control the L3 portions available for > + I/0 traffic. The reserved CLOSID will be excluded for group creation. No. Intel doesn't reserve a single CLOS. It allows to assign RMIDs and CLOSids for I/O monitoring and control. Different IDs can be assigned to different groups of devices (the "grouping" is dependent on h/w routing to devices, not assignable by the OS). I had some patches for this in my abandoned "resctrl2" implementation. No immediate plans to resurrect them since it became clear that the h/w implementation was model specific for just one generation. -Tony
