公开(公告)号：US09569361B2

公开(公告)日：2017-02-14

申请号：US14325343

申请日：2014-07-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Arun Radhakrishnan ,  Kevin Lepak ,  Rama Gopal ,  Murali Chinnakonda ,  Karthik Sundaram ,  Brian Grayson

IPC: G06F12/08

CPC classification number: G06F12/0862 ,  G06F12/10 ,  G06F2212/6022

Abstract: According to one general aspect, an apparatus may include a cache pre-fetcher, and a pre-fetch scheduler. The cache pre-fetcher may be configured to predict, based at least in part upon a virtual address, data to be retrieved from a memory system. The pre-fetch scheduler may be configured to convert the virtual address of the data to a physical address of the data, and request the data from one of a plurality of levels of the memory system. The memory system may include a plurality of levels, each level of the memory system configured to store data.

Abstract translation: 根据一个一般方面，设备可以包括高速缓存预取器和预取调度器。 高速缓存预取器可以被配置为至少部分地基于虚拟地址预测要从存储器系统检索的数据。 预取调度器可以被配置为将数据的虚拟地址转换为数据的物理地址，并且从存储器系统的多个级别之一请求数据。 存储器系统可以包括多个级别，存储器系统的每个级别被配置为存储数据。

公开(公告)号：US09418018B2

公开(公告)日：2016-08-16

申请号：US14337211

申请日：2014-07-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Karthik Sundaram ,  Rama Gopal ,  Murali Chinnakonda

IPC: G06F12/10 ,  G06F12/08 ,  G06F9/38

CPC classification number: G06F12/1045 ,  G06F9/3861 ,  G06F12/0811 ,  G06F12/0859 ,  G06F12/1009 ,  G06F2212/1024 ,  G06F2212/507

Abstract: A Fill Buffer (FB) based data forwarding scheme that stores a combination of Virtual Address (VA), TLB (Translation Look-aside Buffer) entry# or an indication of a location of a Page Table Entry (PTE) in the TLB, and a TLB page size information in the FB and uses these values to expedite FB forwarding. Load (Ld) operations send their non-translated VA for an early comparison against the VA entries in the FB, and are then further qualified with the TLB entry# to determine a “hit.” This hit determination is fast and enables FB forwarding at higher frequencies without waiting for a comparison of Physical Addresses (PA) to conclude in the FB. A safety mechanism may detect a false hit in the FB and generate a late load cancel indication to cancel the earlier-started FB forwarding by ignoring the data obtained as a result of the Ld execution. The Ld is then re-executed later and tries to complete successfully with the correct data.

Abstract translation: 一种基于填充缓冲器（FB）的数据转发方案，其存储虚拟地址（VA），TLB（翻译后备缓冲区）条目＃或页面表项（PTE）在TLB中的位置的指示的组合，以及 FB中的TLB页面大小信息，并使用这些值来加速FB转发。 加载（Ld）操作发送他们的非翻译的VA，以便与FB中的VA条目进行早期比较，然后进一步通过TLB条目＃进行限定，以确定“命中”。该命中确定速度很快，可以使FB转发 更高的频率，而不等待物理地址（PA）的比较结束于FB。 安全机制可以检测到FB中的错误命中，并产生一个晚期负载取消指示，以通过忽略由于执行Ld而获得的数据来取消较早启动的FB转发。 然后，Ld稍后重新执行，并尝试使用正确的数据成功完成。