BUFFER DISCOVERY IN A PARRALLEL MULTI-TASKING MULTI-PROCESSOR ENVIRONMENT

• US 20090216893A1
• Filed: 03/19/2008
• Published: 08/27/2009
• Est. Priority Date: 02/25/2008
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Errickson, Richard K., Houston, John S., Verdibello, Ambrose A. JR., Helmer, Leonard W. JR.
• Application Number:
  US12/051,634
• Publication Number:
  US 20090216893A1
• Time in Patent Office: Days
• US Class Current: 709/230
• CPC Class Codes: G06F 2209/548 Queue
• CPC Class Codes: G06F 9/546 Message passing systems or structures, e.g. queues

Abstract

A computer program product, apparatus and method for buffer discovery in a multi-tasking multi-processor environment. An exemplary embodiment includes establishing a management connection, confirming that end points of the management connection are connected to respective targets, sending a negotiate counts message, including a number and size of buffers associated with parameters of the management connection and receiving a response to the negotiate counts message, the response including at least one of rejection of the management connection and an acceptance of the management connection, including an agreed number and size of the buffers.

Claims

1. A computer program product for identifying sizes and number of buffers across a communication link in a multi-tasking multi-processor environment, the computer program product comprising:

a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising;

establishing a management connection;

confirming that end points of the management connection are connected to respective targets;

sending a negotiate counts message, including a number and size of buffers associated with parameters of the management connection; and

receiving a response to the negotiate counts message, the response including at least one of rejection of the management connection and an acceptance of the management connection, including an agreed number and size of the buffers.

2. The computer program product as claimed in claim 1, wherein the method further comprises in response to a mismatch in the number of buffers, setting a lesser number of buffers in the management connection.

3. The computer program product as claimed in claim 1, wherein the method further comprises in response to a buffer size mismatch, selecting a smaller buffer size as the buffer size.

4. The computer program product as claimed in claim 1, wherein the acceptance of the connection includes a smaller number of selected buffers and a smaller size of the selected buffers.

5. The computer program product as claimed in claim 4, wherein the method further comprises:

accepting the connection; and

storing the agreed number and size of the buffers.

6. The computer program product as claimed in claim 4, wherein the method further comprises creating and connecting queue pairs associated with each of the buffers.

7. The computer program product as claimed in claim 4, wherein the method further comprises sending a node descriptor.

8. The computer program product as claimed in claim 1, wherein the rejection of the connection includes a request to drop the connection.

9. The computer program product as claimed in claim 8, wherein the method further comprises dropping the connection.

10. An apparatus for identifying sizes and number of buffers across a communication link in a multi-tasking multi-processor environment, the apparatus comprising:

a connection manager performing a method comprising;

establishing a management connection;

confirming that end points of the management connection are connected to respective targets;

sending a negotiate counts message, including a number and size of buffers associated with parameters of the management connection; and

receiving a response to the negotiate counts message, the response including at least one of rejection of the management connection and an acceptance of the management connection, including an agreed number and size of the buffers.

11. The apparatus as claimed in claim 10 wherein the method further comprises:

accepting the connection, wherein the acceptance of the connection includes a smaller number of selected buffers and a smaller size of the selected buffers.

storing an agreed number and size of the buffers; and

creating and connecting queue pairs associated with each of the buffers.

12. The apparatus as claimed in claim 10, wherein the method further comprises:

rejecting the connection; and

dropping the connection.

13. A method for identifying sizes and number of buffers across a communication link in a multi-tasking multi-processor environment, the method comprising:

establishing a management connection;

confirming that end points of the management connection are connected to respective targets;

sending a negotiate counts message, including a number and size of buffers associated with parameters of the management connection; and

receiving a response to the negotiate counts message, the response including at least one of rejection of the management connection and an acceptance of the management connection, including an agreed number and size of the buffers.

14. The method as claimed in claim 13, further comprising in response to a mismatch in the number of buffers, setting a lesser number of buffers in the management connection.

15. The method as claimed in claim 13, further comprising in response to a buffer size mismatch, selecting a smaller buffer size as the buffer size.

16. The method as claimed in claim 13, wherein the acceptance of the connection includes a smaller number of selected buffers and a smaller size of the selected buffers.

17. The method as claimed in claim 16, further comprising:

accepting the connection; and

storing the agreed number and size of the buffers.

18. The method as claimed in claim 16, further comprising creating and connecting queue pairs associated with each of the buffers.

19. The method as claimed in claim 13, wherein the rejection of the connection includes a request to drop the connection.

20. The method as claimed in claim 19, further comprising dropping the connection