An apparatus comprising: a cache; a decoder to decode instructions into decoded instructions; an execution unit to execute the decoded instructions to produce resultants; a store buffer to store, in program order, a first storage request, a second storage request, and a third storage request for the resultants from the execution unit; a fill buffer; and a cache controller to: allocate a first entry of a plurality of entries in the fill buffer to store the first storage request when the first storage request misses in the cache, send a first request for ownership to another cache corresponding to the first storage request, detect a hit in the cache for the second storage request, update a globally observable buffer to indicate the first entry in the fill buffer for the first storage request is earlier in program order than the second storage request in the store buffer, allocate, before the second storage request is removed from the store buffer, a second entry of the plurality of entries in the fill buffer to store the third storage request when the third storage request misses in the cache, send a second request for ownership to another cache corresponding to the third storage request, and update the globally observable buffer to indicate the second entry in the fill buffer for the third storage request is later in program order than the second storage request in the store buffer. a cache; a decoder to decode instructions into decoded instructions; an execution unit to execute the decoded instructions to produce resultants; a store buffer to store, in program order, a first storage request, a second storage request, and a third storage request for the resultants from the execution unit; a fill buffer; and a cache controller to: allocate a first entry of a plurality of entries in the fill buffer to store the first storage request when the first storage request misses in the cache, send a first request for ownership to another cache corresponding to the first storage request, detect a hit in the cache for the second storage request, update a globally observable buffer to indicate the first entry in the fill buffer for the first storage request is earlier in program order than the second storage request in the store buffer, allocate, before the second storage request is removed from the store buffer, a second entry of the plurality of entries in the fill buffer to store the third storage request when the third storage request misses in the cache, send a second request for ownership to another cache corresponding to the third storage request, and update the globally observable buffer to indicate the second entry in the fill buffer for the third storage request is later in program order than the second storage request in the store buffer. allocate a first entry of a plurality of entries in the fill buffer to store the first storage request when the first storage request misses in the cache, send a first request for ownership to another cache corresponding to the first storage request, detect a hit in the cache for the second storage request, update a globally observable buffer to indicate the first entry in the fill buffer for the first storage request is earlier in program order than the second storage request in the store buffer, allocate, before the second storage request is removed from the store buffer, a second entry of the plurality of entries in the fill buffer to store the third storage request when the third storage request misses in the cache, send a second request for ownership to another cache corresponding to the third storage request, and update the globally observable buffer to indicate the second entry in the fill buffer for the third storage request is later in program order than the second storage request in the store buffer. <EOS>