公开(公告)号：US20130103906A1

公开(公告)日：2013-04-25

申请号：US13709649

申请日：2012-12-10

Applicant: Apple Inc.

Inventor： Peter J. Bannon ,  Andrew J. Beaumont-Smith ,  Ramesh B. Gunna ,  Wei-han Lien ,  Brian P. Lilly ,  Jaidev P. Patwardhan ,  Shih-Chieh R. Wen ,  Tse-Yu Yeh

IPC: G06F12/08

CPC classification number: G06F12/0891 ,  G06F12/0804

Abstract: In an embodiment, a combining write buffer is configured to maintain one or more flush metrics to determine when to transmit write operations from buffer entries. The combining write buffer may be configured to dynamically modify the flush metrics in response to activity in the write buffer, modifying the conditions under which write operations are transmitted from the write buffer to the next lower level of memory. For example, in one implementation, the flush metrics may include categorizing write buffer entries as “collapsed.” A collapsed write buffer entry, and the collapsed write operations therein, may include at least one write operation that has overwritten data that was written by a previous write operation in the buffer entry. In another implementation, the combining write buffer may maintain the threshold of buffer fullness as a flush metric and may adjust it over time based on the actual buffer fullness.

Abstract translation: 在一个实施例中，组合写缓冲器被配置为维护一个或多个刷新度量以确定何时从缓冲器条目发送写入操作。 组合写缓冲器可以被配置为响应于写缓冲器中的活动来动态地修改刷新度量，修改写操作从写缓冲器发送到下一较低级存储器的条件。 例如，在一个实现中，刷新度量可以包括将写缓冲器条目分类为“折叠”。 折叠的写缓冲器条目及其中的折叠写入操作可以包括至少一个写入操作，该写入操作已经覆盖由缓冲器条目中的先前写入操作写入的数据。 在另一实现中，组合写缓冲器可以将缓冲器充满度的阈值保持为刷新度量，并且可以基于实际的缓冲器充满度随时间调整缓冲器充满度。

公开(公告)号：US08566528B2

公开(公告)日：2013-10-22

申请号：US13709649

申请日：2012-12-10

Applicant: Apple Inc.

Inventor： Peter J. Bannon ,  Andrew J. Beaumont-Smith ,  Ramesh B. Gunna ,  Wei-han Lien ,  Brian P. Lilly ,  Jaidev P. Patwardhan ,  Shih-Chieh R. Wen ,  Tse-Yu Yeh

IPC: G06F12/00 ,  G06F13/00 ,  G06F13/28

CPC classification number: G06F12/0891 ,  G06F12/0804

Abstract: In an embodiment, a combining write buffer is configured to maintain one or more flush metrics to determine when to transmit write operations from buffer entries. The combining write buffer may be configured to dynamically modify the flush metrics in response to activity in the write buffer, modifying the conditions under which write operations are transmitted from the write buffer to the next lower level of memory. For example, in one implementation, the flush metrics may include categorizing write buffer entries as “collapsed.” A collapsed write buffer entry, and the collapsed write operations therein, may include at least one write operation that has overwritten data that was written by a previous write operation in the buffer entry. In another implementation, the combining write buffer may maintain the threshold of buffer fullness as a flush metric and may adjust it over time based on the actual buffer fullness.

Abstract translation: 在一个实施例中，组合写缓冲器被配置为维护一个或多个刷新度量以确定何时从缓冲器条目发送写入操作。 组合写缓冲器可以被配置为响应于写缓冲器中的活动来动态地修改刷新度量，修改写操作从写缓冲器发送到下一较低级存储器的条件。 例如，在一个实现中，刷新度量可以包括将写缓冲器条目分类为“折叠”。 折叠的写缓冲器条目及其中的折叠写入操作可以包括至少一个写入操作，该写入操作已经覆盖由缓冲器条目中的先前写入操作写入的数据。 在另一实现中，组合写缓冲器可以将缓冲器充满度的阈值保持为刷新度量，并且可以基于实际的缓冲器充满度随时间调整缓冲器充满度。