公开(公告)号：EP2788880B1

公开(公告)日：2018-12-26

申请号：EP12856495.2

申请日：2012-11-16

申请人： International Business Machines Corporation

发明人： DODSON, John Steven ,  GOODMAN, Benjiman L. ,  HNATKO, Steven J. ,  WRIGHT, Kenneth L.

IPC分类号： G06F12/0895 ,  G06F12/0815 ,  G06F11/10 ,  G11C29/04

CPC分类号： G06F11/1076 ,  G06F11/1064 ,  G06F12/0815 ,  G06F12/0895 ,  G11C2029/0411

摘要： Mechanisms are provided for efficient storage of meta-bits within a system memory. The mechanisms combine an L/G bit and an SUE bit to form meta-bits. The mechanisms then determine the local/global state of a cache line on the first cycle of data. The mechanisms forward the data to the requesting cache, and the requesting cache may reissue the request globally based on the local/global state of the cache line. The mechanisms then determine the special uncorrectable error state of the cache line on the second or subsequent cycle of data. The mechanisms perform error processing regardless of whether the request was reissued globally.

公开(公告)号：EP2788880A1

公开(公告)日：2014-10-15

申请号：EP12856495.2

申请日：2012-11-16

申请人： International Business Machines Corporation

发明人： DODSON, John Steven ,  GOODMAN, Benjiman L. ,  HNATKO, Steven J. ,  WRIGHT, Kenneth L.

IPC分类号： G06F12/08

CPC分类号： G06F11/1076 ,  G06F11/1064 ,  G06F12/0815 ,  G06F12/0895 ,  G11C2029/0411

摘要： Mechanisms are provided for efficient storage of meta-bits within a system memory. The mechanisms combine an L/G bit and an SUE bit to form meta-bits. The mechanisms then determine the local/global state of a cache line on the first cycle of data. The mechanisms forward the data to the requesting cache, and the requesting cache may reissue the request globally based on the local/global state of the cache line. The mechanisms then determine the special uncorrectable error state of the cache line on the second or subsequent cycle of data. The mechanisms perform error processing regardless of whether the request was reissued globally.