公开(公告)号：US10289587B2

公开(公告)日：2019-05-14

申请号：US15139559

申请日：2016-04-27

申请人： ARM Limited

发明人： Ian David Andrews ,  Andrew David Tune ,  Daniel Adam Sara ,  George Robert Scott Lloyd

IPC分类号： G06F13/40 ,  G06F13/16 ,  G06F13/42 ,  G06F13/36

摘要： A crossbar switch comprises two or more data inputs 10, two or more data outputs 100, a buffer 30 between the inputs and the outputs, an arbiter 52 associated with each output and configured to select data from one of the inputs when there is contention at the output, a bypass 32 associated with the buffer so that the buffer can be enabled or disabled, and a buffer controller 60 configured to enable or disable the buffer. The buffer controller further includes an accumulator 70 configured to assess whether a time-based average of the contention rate, or an average injection rate, at the output associated with the buffer, has reached a predetermined threshold. This prevents the buffer being enabled when the contention is only intermittent, which reduces power consumption without significant loss of performance.