Multi-level system memory configurations to operate higher priority users out of a faster memory level

A method is described. The method includes recognizing higher priority users of a multi-level system memory characterized by a faster higher level and a slower lower level in which the higher level isto act as a cache for the lower level and in which a first capacity of the higher level is less than a second capacity of the lower level such that caching resources of the higher level are oversubscribe-able. The method also includes performing at least one of: declaring an amount of the second capacity un-useable to reduce oversubscription of the caching resources; allocating system memory address space of the multi-level system memory so that requests associated with lower priority users will not compete with requests associated with the higher priority users for the caching resources. 描述了一种方法。所述方法包括识别通过较快较高级别和较慢较低级别所表征的多级系统存储器的较高优先级用户，其中较高级别将充当较低级别的高速缓存，并且其中较高级别的第一容量小于较低级别的第二容量，使得较高级别的高速缓存资源是可超额预订的。所述方法还包括执行下列至少一个：断言不可用的第二容量的量以降低高速缓存资源的超额预订；分配多级系统存储器的系统存储器地址空间，使得与较低优先级用户关联的请求将不和与较高优先级用户关联的请求竞争高速缓存资源。