Re: [libvirt] [PATCH V3] Expose resource control capabilites on cache bank

On Thursday, 6 April 2017 at 9:04 PM, Martin Kletzander wrote: There’s a discussion from https://www.redhat.com/archives/libvir-list/2017-March/msg01689.html I think I made a mistake here, it should be ’scope’ instead of ’type’ here. No matter what’s it should be, at least we need to identify if the host enabled CDP for L3 cache or not. If enabled CDP on host, the resctrl looks like this: root@s2600wt:/sys/fs/resctrl# cat schemata L3DATA:0=fffff;1=fffff L3CODE:0=fffff;1=fffff root@s2600wt:/sys/fs/resctrl# cat info/L3 L3CODE/ L3DATA/ root@s2600wt:/sys/fs/resctrl# cat info/L3DATA/num_closids 8 root@s2600wt:/sys/fs/resctrl# cat info/L3CODE/num_closids 8 as you can see that num_closids are divided into 2 part (compared to 16 without CDP), but other info are still same root@s2600wt:/sys/fs/resctrl# cat info/L3CODE/cbm_mask fffff root@s2600wt:/sys/fs/resctrl# cat info/L3CODE/min_cbm_bits 1 root@s2600wt:/sys/fs/resctrl# cat info/L3DATA/cbm_mask fffff root@s2600wt:/sys/fs/resctrl# cat info/L3DATA/min_cbm_bits 1 ------------------------------------------ below output are from disable CDP: root@s2600wt:/sys/fs/resctrl# cat schemata L3:0=fffff;1=fffff root@s2600wt:/sys/fs/resctrl# cat info/L3/ cbm_mask min_cbm_bits num_closids root@s2600wt:/sys/fs/resctrl# cat info/L3/cbm_mask fffff root@s2600wt:/sys/fs/resctrl# cat info/L3/min_cbm_bits 1 root@s2600wt:/sys/fs/resctrl# cat info/L3/num_closids 16