公开(公告)号：US10956163B2

公开(公告)日：2021-03-23

申请号：US15845641

申请日：2017-12-18

Applicant: ADVANCED MICRO DEVICES, INC.

Inventor： Jaewoong Chung ,  David S. Christie ,  Michael P. Hohmuth ,  Stephan Diestelhorst ,  Martin Pohlack ,  Luke Yen

IPC: G06F9/38 ,  G06F9/30 ,  G06F9/46

Abstract: A processing core of a plurality of processing cores is configured to execute a speculative region of code a single atomic memory transaction with respect one or more others of the plurality of processing cores. In response to determining an abort condition for issued one of the plurality of program instructions and in response to determining that the issued program instruction is not part of a mispredicted execution path, the processing core is configured to abort an attempt to execute the speculative region of code.

公开(公告)号：US10261916B2

公开(公告)日：2019-04-16

申请号：US15361335

申请日：2016-11-25

Applicant: Advanced Micro Devices, Inc.

Inventor： Amro Awad ,  Sergey Blagodurov ,  Arkaprava Basu ,  Mark H. Oskin ,  Gabriel H. Loh ,  Andrew G. Kegel ,  David S. Christie ,  Kevin J. McGrath

IPC: G06F12/10 ,  G06F12/1036 ,  G06F12/1009 ,  G06F12/1027

Abstract: The described embodiments include a computing device with two or more translation lookaside buffers (TLB). During operation, the computing device updates an entry in the TLB based on a virtual address to physical address translation and metadata from a page table entry that were acquired during a page table walk. The computing device then computes, based on a lease length expression, a lease length for the entry in the TLB. Next, the computing device sets, for the entry in the TLB, a lease value to the lease length, wherein the lease value represents a time until a lease for the entry in the TLB expires, wherein the entry in the TLB is invalid when the associated lease has expired. The computing device then uses the lease value to control operations that are allowed to be performed using information from the entry in the TLB.

公开(公告)号：US20170277634A1

公开(公告)日：2017-09-28

申请号：US15081379

申请日：2016-03-25

Applicant: Advanced Micro Devices, Inc.

Inventor： Arkaprava Basu ,  Mark H. Oskin ,  Gabriel H. Loh ,  Andrew G. Kegel ,  David S. Christie ,  Kevin J. McGrath

IPC: G06F12/08 ,  G06F12/10

CPC classification number: G06F12/1027 ,  G06F12/0811 ,  G06F2212/1024 ,  G06F2212/683 ,  G06F2212/684

Abstract: The described embodiments include a computing device with two or more translation lookaside buffers (TLB) that performs operations for handling entries in the TLBs. During operation, the computing device maintains lease values for entries in the TLBs, the lease values representing times until leases for the entries expire, wherein a given entry in the TLB is invalid when the associated lease has expired. The computing device uses the lease value to control operations that are allowed to be performed using information from the entries in the TLBs. In addition, the computing device maintains, in a page table, longest lease values for page table entries indicating when corresponding longest leases for entries in TLBs expire. The longest lease values are used to determine when and if a TLB shootdown is to be performed.