Traffic control method and apparatus of multiprocessor system

• US 8,909,873 B2
• Filed: 09/02/2011
• Issued: 12/09/2014
• Est. Priority Date: 09/03/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Joong Baik, Lee, Seung Wook, Baik, Min Seung, Kwon, Soon Wan
• Primary Examiner(s): Chery, Mardochee
• Application Number:
  US13/224,668
• Publication Number:
  US 20120060007A1
• Time in Patent Office: 1,194 Days
• Field of Search: 711/151, 711/163, 711/E12.091, 712/130, 712/E9.003
• US Class Current: 711/151
• CPC Class Codes: G06F 15/17325 Synchronisation; Hardware support therefor intertask synchronisation G06F9/52

Abstract

A method and apparatus for controlling traffic of multiprocessor system or multi-core system is provided. The traffic control apparatus of a multiprocessor system according to the present invention includes a request handler for processing a traffic request of a first processor, and a Quality of Service (QoS) manager for receiving a QoS guaranty start instruction for a second processor from the multiprocessor system, and for transmitting, when traffic of the second processor is detected, a traffic adjustment signal to the request handler. The request handler adjusts the traffic of the first processor according to the received traffic adjustment signal. The traffic control method and apparatus of the present invention is capable of adjusting the required bandwidths of individual technologies and guaranteeing the real-timeness in the multiprocessor system or multi-core system.

Claims

1. A multiprocessor system for controlling a traffic of a processor, the multiprocessor system comprising:

two or more processors;

two or more request handlers, each of the two or more request handlers processing a traffic request of a corresponding processor among the two or more processors; and

a Quality of Service (QoS) manager for determining whether the traffic request requests QoS guaranty based QoS information and transmitting a traffic adjustment signal to each of the two or more request handlers according to the determined result,

wherein each of the two or more request handlers adjusts the traffic of the corresponding processor according to the traffic adjustment signal and the QoS information indicates at least QoS scenario.

2. The multiprocessor system of claim 1, wherein the QoS manager transmits, if a QoS scenario identifier and a QoS level identifier are received from one among the two or more processors, the traffic adjustment signal instructing to adjust the traffic in a QoS guaranty scheme corresponding to the QoS scenario identifier and the QoS level identifier.

3. The multiprocessor system of claim 2, wherein each of the two or more request handlers analyzes the traffic of the corresponding processor and transmits traffic amount information to the QoS manager, and the QoS manager receives and analyzes, if the QoS scenario identifier and the QoS level identifier are received from one among the two or more processors the traffic amount information, determines whether QoS level compensation is necessary based on the traffic amount of the first processor, and compensates, if the QoS level compensation is necessary, the QoS level.

4. The multiprocessor system of claim 3, wherein the QoS manager comprises a register and receives the QoS scenario identifier and the QoS level identifier from one among the two or more processors by detecting the QoS scenario identifier and the QoS level identifier registered in the register.

5. The multiprocessor system of claim 1, wherein the QoS manager transmits, if completion of traffic transmission relating to the traffic request is detected, a traffic adjustment release signal to each of the two or more request handlers, and each of the two or more request handlers ends, if the traffic adjustment release signal is received, the adjustment of the traffic of the corresponding processor.

6. The multiprocessor system of claim 1, wherein the QoS manager transmits, if a QoS guaranty end instruction for the traffic request is received from one among the two or more processors, a traffic adjustment release signal to each of the two or more request handlers, and each of the two or more request handlers ends, if the traffic adjustment release signal is received, the adjustment of the traffic of the corresponding processor.

7. The multiprocessor system of claim 1, wherein the QoS manager comprises a register and receives a QoS guaranty start instruction and a QoS guaranty end instruction of the traffic request from one among the two or more processors by detecting a processor identifier registered in the register.

8. The multiprocessor system of claim 1, wherein the traffic adjustment signal comprises a traffic blocking signal, and the request handler blocks, if the traffic blocking signal is received, the traffic of the corresponding processor.

9. The multiprocessor system of claim 1, wherein the traffic adjustment signal comprises a traffic adjustment method, and further wherein the traffic adjustment method comprises at least one of permitting a predetermined amount of traffic of a processor and rejecting all traffic of a processor.

10. The multiprocessor system of claim 1, further comprising a memory,

wherein, the traffic adjustment signal comprises a traffic adjustment method, and further wherein the traffic adjustment method comprises permitting a processor to read data from the memory and blocking a processor from writing data to the memory.

21. The apparatus of claim 1, wherein the QoS information includes at least one of a QoS scenario identifier or a QoS level identifier of a processor.

11. A traffic control method of a multiprocessor system including two or more processors, two or more request handlers and a QoS manager, the method comprising:

processing, at each of the two or more request handlers, a traffic request of a corresponding processor among the two or more processors;

determining whether the traffic request requests QoS guaranty based QoS information and transmitting a traffic adjustment signal from the QoS manager to each of the two or more request handlers according to the determined result; and

adjusting, at each of the two or more request handlers, the traffic of the corresponding processor according to the traffic adjustment signal,

wherein the QoS information indicates at least QoS scenario.

12. The method of claim 11, wherein the QoS manager transmits, if a QoS scenario identifier and a QoS level identifier are received from one among the two or more processors, the traffic adjustment signal instructing to adjust the traffic in a QoS guaranty scheme corresponding to the QoS scenario identifier and the QoS level identifier.

13. The method of claim 12, further comprising:

analyzing, at each of the two or more request handlers, the traffic of the corresponding processor;

transmitting traffic amount information from each of the two or more request handlers to the QoS manager;

receiving and analyzing, at the QoS manager if the QoS scenario identifier and the QoS level identifier are received from one among the two or more processors, the traffic amount information;

determining whether QoS level compensation is necessary based on the traffic amount of the traffic request; and

compensating, if the QoS level compensation is necessary, the QoS level.

14. The method of claim 13, wherein the QoS manager comprises a register and receives the QoS scenario identifier and the QoS level identifier from one among the two or more processors by detecting the QoS scenario identifier and the QoS level identifier registered in the register.

15. The method of claim 11, further comprising:

transmitting, if completion of traffic transmission relating to the traffic request is detected, a traffic adjustment release signal from the QoS manager to each of the two or more request handlers; and

ending, at each of the two or more request handlers if the traffic adjustment release signal is received, the adjustment of the traffic of the corresponding processor.

16. The method of claim 11, further comprising:

transmitting, if a QoS guaranty end instruction for the second processor is received from one among the two or more processors, a traffic adjustment release signal from the QoS manager to each of the two or more request handlers; and

ending, at each of the two or more request handlers if the traffic adjustment release signal is received, the adjustment of the traffic of the corresponding processor.

17. The method of claim 11, wherein the QoS manager comprises a register and receives a QoS guaranty start instruction and a QoS guaranty end instruction of the traffic request from one among the two or more processors by detecting a processor identifier registered in the register.

18. The method of claim 11, wherein the traffic adjustment signal comprises a traffic blocking signal, and the request handler blocks, if the traffic blocking signal is received, the traffic of the corresponding processor.

19. The method of claim 11, wherein the traffic adjustment signal comprises a traffic adjustment method, and further wherein the traffic adjustment method comprises at least one of permitting a predetermined amount of traffic of a processor and rejecting all traffic of a processor.

20. The method of claim 11, wherein, the traffic adjustment signal comprises a traffic adjustment method, and further wherein the traffic adjustment method comprises permitting a processor to read data from a memory and blocking a processor from writing data to the memory.

22. The method of claim 11, wherein the QoS information includes at least one of a QoS scenario identifier or a QoS level identifier of a processor.