公开(公告)号：US20180246816A1

公开(公告)日：2018-08-30

申请号：US15442487

申请日：2017-02-24

申请人： Advanced Micro Devices, Inc. ,  ATI Technologies ULC

发明人： Wade K. Smith ,  Kostantinos Danny Christidis

IPC分类号： G06F12/1027 ,  G06F12/1081 ,  G06F12/1009 ,  G06F9/38

摘要： Techniques are provided for using a translation lookaside buffer to provide low latency memory address translations for data streams. Clients of a memory system first prepare the address translation cache hierarchy by requesting that a translation pre-fetch stream is initialized. After the translation pre-fetch stream is initialized, the cache hierarchy returns an acknowledgment of completion to the client, which then begins to access memory. Pre-fetch streams are specified in terms of address ranges and are performed for large contiguous portions of the virtual memory address space.

公开(公告)号：US20180246815A1

公开(公告)日：2018-08-30

申请号：US15442462

申请日：2017-02-24

申请人： Advanced Micro Devices, Inc. ,  ATI Technologies ULC

发明人： Wade K. Smith ,  Kostantinos Danny Christidis

IPC分类号： G06F12/1027 ,  G06F12/1081 ,  G06F12/1009 ,  G06F9/38

CPC分类号： G06F12/1027 ,  G06F9/3887 ,  G06F12/1009 ,  G06F12/1081 ,  G06F2212/681 ,  G06F2212/684

摘要： Techniques are provided for managing address translation request traffic where memory access requests can be made with differing quality-of-service levels, which specify latency and/or bandwidth requirements. The techniques involve translation lookaside buffers. Within the translation lookaside buffers, certain resources are reserved for specific quality-of-service levels. More specifically, translation lookaside buffer slots, which store the actual translations, as well as finite state machines in a work queue, are reserved for specific quality-of-service levels. The translation lookaside buffer receives multiple requests for address translation. The translation lookaside buffer selects requests having the highest quality-of-service level for which an available finite state machine is available. The fact that finite state machines are reserved to particular quality-of-service levels means that if all such finite state machines for a particular quality-of-service level are used by pending translation requests, then the translation lookaside buffer does not accept more translation requests for that quality-of-service level.