Re: [libvirt] [PATCHv5 02/19] util: Introduce resctrl monitor for CMT

Cache Monitoring Technology (aka CMT) provides the capability to report cache utilization information of system task. This patch introduces the concept of resctrl monitor through data structure virResctrlMonitor. Signed-off-by: Wang Huaqiang <huaqiang.wang(a)intel.com&gt; --- src/libvirt_private.syms | 1 + src/util/virresctrl.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ src/util/virresctrl.h | 7 ++++++ 3 files changed, 64 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 335210c..d2573c5 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -2680,6 +2680,7 @@ virResctrlInfoGetCache; virResctrlInfoGetMonitorPrefix; virResctrlInfoMonFree; virResctrlInfoNew; +virResctrlMonitorNew; # util/virrotatingfile.h diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c index 697424c..18ee560 100644 --- a/src/util/virresctrl.c +++ b/src/util/virresctrl.c @@ -105,6 +105,7 @@ typedef virResctrlAllocMemBW *virResctrlAllocMemBWPtr; /* Class definitions and initializations */ static virClassPtr virResctrlInfoClass; static virClassPtr virResctrlAllocClass; +static virClassPtr virResctrlMonitorClass; /* virResctrlInfo */ @@ -319,6 +320,35 @@ struct _virResctrlAlloc { char *path; }; +/* virResctrlMonitor */ + +/* + * virResctrlMonitor is the data structure for resctrl monitor. Resctrl + * monitor represents a resctrl monitoring group, which can be used to + * monitor the resource utilization information for either cache or + * memory bandwidth. + * + * From hardware perspective, cache monitoring technology (CMT), memory + * bandwidth technology (MBM), as well as the CAT and MBA, are all orthogonal + * features. The monitor will be created under the scope of default allocation + * if no CAT or MBA supported in the system.