Interconnect distributed virtual memory (DVM) message preemptive responding

Patent metadata

Field	Value
Publication number	US-9910799-B2
Application number	US-201615089814-A
Country	US
Kind code	B2
Filing date	Apr 4, 2016
Priority date	Apr 4, 2016
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

Aspects include computing devices, apparatus, and methods for accelerating distributive virtual memory (DVM) message processing in a computing device. DVM message interceptors may be positioned in various locations within a DVM network of a computing device so that DVM messages may be intercepted before reaching certain DVM destinations. A DVM message interceptor may receive a broadcast DVM message from first DVM source. The DVM message interceptor may determine whether a preemptive DVM message response should be returned to the DVM source on behalf of the DVM destination. When certain criteria are met, the DVM message interceptor may generate a preemptive DVM message response to the broadcast DVM message, and send the preemptive DVM message response to the DVM source.

First claim

What is claimed is:

1. A method of distributive virtual memory (DVM) preemptive responding on a computing device, comprising:
receiving a DVM message broadcast from a first DVM source in a DVM message interceptor prior to delivery of the DVM message to a DVM destination;
determining based on a content of the DVM message whether a preemptive DVM message response should be sent by the DVM message interceptor;
generating the preemptive DVM message in response to determining that a preemptive DVM message response should be sent by the DVM message interceptor; and
sending the preemptive DVM message response from the DVM message interceptor to the first DVM source.

2. The method of claim 1 , further comprising enabling the broadcast DVM message to reach the DVM destination in response to determining that a preemptive DVM message response should not be sent by the DVM message interceptor.

3. The method of claim 1 , wherein the DVM destination is a memory management unit and the DVM message interceptor is positioned within a DVM system to intercept the DVM message before the DVM message reaches the memory management unit.

4. The method of claim 1 , further comprising preventing the DVM destination from receiving the broadcast DVM message in response to determining that a preemptive DVM message response should be sent by the DVM message interceptor.

5. The method of claim 1 , wherein determining based on a content of the DVM message whether a preemptive DVM message response should be sent by the DVM message interceptor comprises:
comparing data obtained from the broadcast DVM message with corresponding data in at least one of a white-list and a black-list; and
determining whether a preemptive DVM message response should be sent by the DVM message interceptor based upon the comparison.

6. The method of claim 1 , wherein determining based on a content of the DVM message whether a preemptive DVM message response should be sent by the DVM message interceptor comprises applying a mask to data obtained from the broadcast DVM message.

7. The method of claim 1 , wherein determining based on a content of the DVM message whether a preemptive DVM message response should be sent by the DVM message interceptor comprises comparing data obtained from the broadcast DVM message with a criterion comprising at least one of a virtual memory identifier, a shared process context, a DVM operation, a memory translation stage identifier, and an execution level identifier.

8. A distributive virtual memory (DVM) message interceptor, comprising:
a DVM communication interface;
a preemption identifier communicatively connected to the DVM communication interface; and
a DVM message response generator communicatively connected to the DVM communication interface and the preemption identifier,
wherein:
the DVM communication interface is configured to perform operations comprising:
receiving a DVM message broadcast from a first DVM source prior to delivery of the DVM message to a DVM destination; and
sending a preemptive DVM message response to the first DVM source;

the preemption identifier is configured to perform operations comprising determining based on a content of the DVM message whether a preemptive DVM message response should be sent; and
the DVM message response generator is configured to perform operations comprising generating the preemptive DVM message in response to determining that a preemptive DVM message response should be sent.

9. The DVM message interceptor of claim 8 , wherein the DVM communication interface is configured to perform operations further comprising enabling the broadcast DVM message to reach the DVM destination in response to determining that a preemptive DVM message response should not be sent.

10. The DVM message interceptor of claim 8 , wherein the DVM destination is a memory management unit and the DVM message interceptor is positioned within a DVM system downstream from a DVM source issuing the DVM message and upstream from the memory management unit to intercept the DVM message before the DVM message reaches the memory management unit.

11. The DVM message interceptor of claim 8 , wherein the preemption identifier is configured to perform operations further comprising preventing the DVM destination from receiving the broadcast DVM message in response to determining that a preemptive DVM message response should be sent.

12. The DVM message interceptor of claim 8 , wherein the preemption identifier is configured to perform operations such that determining based on a content of the DVM message whether a preemptive DVM message response should be sent comprises:
comparing data obtained from the broadcast DVM message with corresponding data in at least one of a white-list and a black-list; and
determining whether a preemptive DVM message response should be sent based upon the comparison.

13. The DVM message interceptor of claim 8 , wherein the preemption identifier is configured to perform operations such that determining based on a content of the DVM message whether a preemptive DVM message response should be sent comprises applying a mask to data obtained from the broadcast DVM message.

14. The DVM message interceptor of claim 8 , wherein the preemption identifier is configured to perform operations such that determining based on a content of the DVM message whether a preemptive DVM message response should be sent comprises comparing data obtained from the broadcast DVM message with a criterion comprising at least one of a virtual memory identifier, a shared process context, a DVM operation, a memory translation stage identifier, and an execution level identifier.

15. A distributive virtual memory (DVM) message interceptor, comprising:
means for receiving a DVM message broadcast from a first DVM source in a DVM message interceptor prior to delivery of the DVM message to a DVM destination;
means for determining based on a content of the DVM message whether a preemptive DVM message response should be sent;
means for generating the preemptive DVM message in response to determining that a preemptive DVM message response should be sent; and
means for sending the preemptive DVM message response to the first DVM source.

16. The DVM message interceptor of claim 15 , further comprising means for enabling the broadcast DVM message to reach the DVM destination in response to determining that a preemptive DVM message response should not be sent.

17. The DVM message interceptor of claim 15 , wherein the DVM destination is a memory management unit and the DVM message interceptor further comprising means to intercept the DVM message before the DVM message reaches the memory management unit.

18. The DVM message interceptor of claim 15 , further comprising means for preventing the DVM destination from receiving the broadcast DVM message in response to determining that a preemptive DVM message response should be sent.

19. The DVM message interceptor of claim 15 , wherein means for determining based on a content of the DVM message whether a preemptive DVM message response should be sent comprises:
means for comparing data obtained from the broadcast DVM message with corresponding data in at least one of a white-list and a black-list; and
means for determining whether a preemptive DVM message response should be sent based upon the comparison.

20. The DVM message interceptor of claim 15 , wherein means for determining based on a content of the DVM message whether a preemptive DVM message response should be sent comprises m

Assignees

• Qualcomm Inc

Inventors

• Avoinne Christophe
• Podaima Jason Edward
• SOMASUNDARAM Manokanthan
• Rychlik Bohuslav
• Zeng Thomas
• Subramaniam Ganasan Jaya
• Xu Kun

Classifications

• G06F9/546

  Message passing systems or structures, e.g. queues · CPC title

• G06F12/08

  in hierarchically structured memory systems, e.g. virtual memory systems · CPC title

• G06F2212/657

  Virtual address space management · CPC title

• G06F15/17331

  Distributed shared memory [DSM], e.g. remote direct memory access [RDMA] · CPC title

• G06F9/5016

  the resource being the memory · CPC title