公开(公告)号：US10884928B2

公开(公告)日：2021-01-05

申请号：US16379303

申请日：2019-04-09

Applicant: Google LLC

Inventor： Richard Yoo ,  Liqun Cheng ,  Benjamin C. Serebrin ,  Parthasarathy Ranganathan ,  Rama Krishna Govindaraju

IPC: G06F12/0811 ,  G06F12/0871 ,  G06F12/0897

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for caching data not frequently accessed. One of the methods includes receiving a request for data from a component of a device, determining that the data satisfies an infrequency condition, in response to determining that the data satisfies the infrequency condition: determining a target cache level which defines a cache level within a cache level hierarchy of a particular cache at which to store infrequently accessed data, the target cache level being lower than a highest cache level in the cache level hierarchy, requesting and receiving the data from a memory that is not a cache of the device, and storing the data in a level of the particular cache that is at or below the target cache level in the cache level hierarchy, and providing the data to the component.

公开(公告)号：US10481811B2

公开(公告)日：2019-11-19

申请号：US16242669

申请日：2019-01-08

Applicant: Google LLC

Inventor： Rama Krishna Govindaraju ,  Liqun Cheng ,  Parthasarathy Ranganathan ,  Michael R. Marty ,  Andrew Gallatin

IPC: G06F3/06 ,  G06F12/1081 ,  G06F12/0888

Abstract: An example method includes during execution of a software application by a processor, receiving, by a copy processor separate from the processor, a request for an asynchronous data copy operation to copy data within a memory accessible by the copy processor, wherein the request is received from a copy manager accessible by the software application in a user space of an operating system managing execution of the software application; in response to the request, initiating, by the copy processor, the asynchronous data copy operation; continuing execution of the software application by the processor; determining, by the copy processor, that the asynchronous data copy operation has completed; and in response to determining that the asynchronous copy operation has completed, selectively notifying, by the copy processor, the software application that the asynchronous copy operation has completed.

公开(公告)号：US20190155658A1

公开(公告)日：2019-05-23

申请号：US16198583

申请日：2018-11-21

Applicant: Google LLC

Inventor： Liqun Cheng ,  Rama Krishna Govindaraju ,  Haishan Zhu ,  David Lo ,  Parthasarathy Ranganathan ,  Nishant Patil

IPC: G06F9/50 ,  G06F9/48 ,  G06N20/00

Abstract: Methods, systems, and computer storage media storing instructions for managing processing system efficiency. One of the methods includes obtaining data splitting a plurality of general-purpose processing units in a processing system into a high-priority domain and a low-priority domain, wherein the general-purpose processing units in the high-priority domain are assigned to perform one or more tasks comprising one or more high-priority tasks, and the general-purpose processing units in the low-priority domain are assigned to perform one or more low-priority tasks; and during runtime of the processing system, obtaining memory usage measurements that characterize usage of system memory by the high-priority domain and the low-priority domain; and adjusting, based on the memory usage measurements, a configuration of (i) the high-priority domain, (ii) the low-priority domain, or (iii) both to adjust utilization of the system memory by the general-purpose processing units.

公开(公告)号：US20180336137A1

公开(公告)日：2018-11-22

申请号：US16046396

申请日：2018-07-26

Applicant: Google LLC

Inventor： Rama Krishna Govindaraju ,  Liqun Cheng ,  Parthasarathy Ranganathan

IPC: G06F12/0862 ,  G06F3/06 ,  G06F12/0868

CPC classification number: G06F12/0862 ,  G06F3/06 ,  G06F12/0868 ,  G06F2212/602

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for pre-fetching data. The methods, systems, and apparatus include actions of providing a request for data to an input-output device and receiving a set of memory addresses for the requested data. Additional actions include determining a subset of the memory addresses, providing a request for a processor to pre-fetch or inject data corresponding to the subset of the memory addresses, and receiving the requested data and the set of memory addresses. Additional actions include determining that the received data includes data for the subset of memory addresses that has been requested to be pre-fetched or injected, storing the data for the subset of memory addresses in a cache of the processor, and storing remaining data of the received data for the memory addresses in a main memory.

公开(公告)号：US10055350B2

公开(公告)日：2018-08-21

申请号：US14533307

申请日：2014-11-05

Applicant: GOOGLE LLC

Inventor： Rama Krishna Govindaraju ,  Liqun Cheng ,  Parthasarathy Ranganathan

IPC: G06F12/00 ,  G06F12/0862 ,  G06F12/0868 ,  G06F3/06

CPC classification number: G06F12/0862 ,  G06F3/06 ,  G06F12/0868 ,  G06F2212/602

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for pre-fetching data. The methods, systems, and apparatus include actions of providing a request for data to an input-output device and receiving a set of memory addresses for the requested data. Additional actions include determining a subset of the memory addresses, providing a request for a processor to pre-fetch or inject data corresponding to the subset of the memory addresses, and receiving the requested data and the set of memory addresses. Additional actions include determining that the received data includes data for the subset of memory addresses that has been requested to be pre-fetched or injected, storing the data for the subset of memory addresses in a cache of the processor, and storing remaining data of the received data for the memory addresses in a main memory.