1. A non-transitory machine readable medium having program code that when processed by a processor causes the processor to perform a method comprising: determining at least one value corresponding to an activity level of a core of the processor and a rate at which a dirty cache line of a cache of the core is to be sent from said core to a storage external from said core; and sending the dirty cache line from the cache to the storage external to the core in response to the at least one value.