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@xxxxxxxxx> --- 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. + */ +struct _virResctrlMonitor { + virObject parent; + + /* In resctrl, each monitor is associated with one specific allocation, + * either the allocation under /sys/fs/resctrl or the default allocation. + * If this pointer is NULL, then the monitor will be associated with + * default allocation, otherwise, this pointer points to the allocation + * this monitor associated with. */ + virResctrlAllocPtr alloc; + /* The monitor identifier */ + char *id; + /* libvirt-generated path in /sys/fs/resctrl for this particular + * monitor */ + char *path; +}; + static void virResctrlAllocDispose(void *obj) @@ -368,6 +398,17 @@ virResctrlAllocDispose(void *obj) } +static void +virResctrlMonitorDispose(void *obj) +{ + virResctrlMonitorPtr monitor = obj; + + virObjectUnref(monitor->alloc); + VIR_FREE(monitor->id); + VIR_FREE(monitor->path); +} + + /* Global initialization for classes */ static int virResctrlOnceInit(void) @@ -378,6 +419,9 @@ virResctrlOnceInit(void) if (!VIR_CLASS_NEW(virResctrlAlloc, virClassForObject())) return -1; + if (!VIR_CLASS_NEW(virResctrlMonitor, virClassForObject())) + return -1; + return 0; } @@ -2372,3 +2416,15 @@ virResctrlAllocRemove(virResctrlAllocPtr alloc) return ret; } + + +/* virResctrlMonitor-related definitions */ + +virResctrlMonitorPtr +virResctrlMonitorNew(void) +{ + if (virResctrlInitialize() < 0) + return NULL; + + return virObjectNew(virResctrlMonitorClass); +} diff --git a/src/util/virresctrl.h b/src/util/virresctrl.h index 10505e9..f59a9aa 100644 --- a/src/util/virresctrl.h +++ b/src/util/virresctrl.h @@ -185,4 +185,11 @@ int virResctrlInfoGetMonitorPrefix(virResctrlInfoPtr resctrl, const char *prefix, virResctrlInfoMonPtr *monitor); + +/* Monitor-related things */ +typedef struct _virResctrlMonitor virResctrlMonitor; +typedef virResctrlMonitor *virResctrlMonitorPtr; + +virResctrlMonitorPtr +virResctrlMonitorNew(void); #endif /* __VIR_RESCTRL_H__ */ -- 2.7.4 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list