Communication device management program

• US 8,180,842 B2
• Filed: 12/16/2004
• Issued: 05/15/2012
• Est. Priority Date: 12/19/2003
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Hirai, Koichi
• Primary Examiner(s): Follansbee, John
• Assistant Examiner(s): Daftuar, Saket K
• Application Number:
  US11/014,680
• Publication Number:
  US 20050141444A1
• Time in Patent Office: 2,707 Days
• Field of Search: 709219-223, 709/225, 709212-217, 707 1- 10, 707203-205, 711/147, 711/170, 711/152, 711/203
• US Class Current: 709/212
• CPC Class Codes: G06F 13/28 using burst mode transfer, e.g. direct memory access DMA, cycle steal G06F13/32 takes precedence
• CPC Class Codes: H04L 49/90 Buffering arrangements

Abstract

A communication device management program that enables efficient use of memory space in receiving data using remote direct memory access (RDMA) techniques. The receiving node transmits a virtual ID corresponding to a receiving process to a remote sending node. A sending process in the sending node specifies this virtual ID when starting data transmission. If the receiving node has not reserved a memory area corresponding to that virtual ID, the sending node transmits a reservation request to the receiving node, which causes a data receiving memory area to be reserved for use by a communication device in the receiving node. In the sending node, the sending communication device begins sending transmission data in RDMA mode, from a memory area managed by the sending process to the reserved data receiving memory area. The receiving communication device directs incoming transmission data to a memory area managed by the receiving process.

Claims

1. A communication device management method, comprising:

generating a virtual ID used to specify a memory area for receiving data which is not associated with a memory area and corresponds to a process of acquiring data from a remote node via a network upon receipt of a request from the process;

transmitting to the remote node the virtual ID corresponding to the process;

reserving, via the network, a data receiving memory area used to store data by RDMA (Remote Direct Memory Access) of a communication device in a memory space upon receipt of an address acquisition request with a specified virtual ID from the remote node;

storing, via the network, a record of association between the specified virtual ID and the data receiving memory area in a storage device;

notifying, via the network, the remote node of a beginning address and a size of the reserved data receiving memory area; and

when transmission data from the remote node is stored into the reserved data receiving memory area by RDMA, consulting the record stored in the storage device to identify the process corresponding to the data receiving memory area storing the transmission data, and outputting an instruction to the communication device to forward the transmission data stored in the reserved data receiving memory area to a memory area managed by the identified process.

2. A communication device management method comprising:

receiving a virtual ID used to specify a memory area for receiving data by a remote node which is not associated with a memory area and corresponds to a first process in the remote node from the remote node via a network and storing the virtual ID in a storage device, the virtual ID generated by the remote node upon receipt of a request from the first process;

consulting the storage device to determine whether the remote node has reserved a data receiving memory area corresponding to the virtual ID upon receipt of a transmission request from a second process;

transmitting, via the network, a reservation request with the virtual ID for the data receiving memory area used to store data by RDMA (Remote Direct Memory Access) to the remote node when the data receiving memory area has not been reserved;

storing data, via the network, indicating the memory area in the storage device after associating the data with the virtual ID upon receipt of a reservation response indicating a beginning address and a size of the reserved data receiving memory area from the remote node, and storing the address in the storage device; and

consulting, via the network, the storage device to identify the beginning address and the size of the data receiving memory area corresponding to the virtual ID specified by the transmission request and, to a communication device, outputting a data transmission instruction to store transmission data stored in a memory area managed by the second process to into the data receiving memory area in the remote node by the RDMA.

3. A communication management apparatus, comprising:

a communication device; and

one or more processors configured to perform a procedure comprising;

generating a virtual ID used to specify a memory area for receiving data which is not associated with a memory area and corresponds to a process of acquiring data from a remote node via a network upon receipt of a request from the process;

transmitting to the remote node the virtual ID corresponding to the process;

reserving, via the network, a data receiving memory area used to store data by RDMA (Remote Direct Memory Access) of the communication device in a memory space upon receipt of an address acquisition request with a specified virtual ID from the remote node;

storing, via the network, a record of association between the specified virtual ID and the data receiving memory area;

notifying, via the network, the remote node of a beginning address and a size of the reserved data receiving memory area; and

when transmission data from the remote node is stored into the reserved data receiving memory area by the RDMA, consulting the record stored in the storage device to identify the process corresponding to the data receiving memory area storing the transmission data, and outputting an instruction to the communication device to forward the transmission data stored in the reserved data receiving memory area to a memory area managed by the identified process.

4. A communication management apparatus for carrying out data transmission to a remote node, comprising:

a communication device; and

one or more processors configured to perform a procedure comprising;

receiving a virtual ID used to specify a memory area for receiving data by a remote node which is not associated with a memory area and corresponds to a first process in the remote node from the remote node via a network and storing the virtual ID in a storage device, the virtual ID generated by the remote node upon receipt of a request from the first process;

consulting the storage device to determine whether the remote node has reserved a data receiving memory area corresponding to the virtual ID upon receipt of a transmission request from a second process;

transmitting, via the network, a reservation request with the virtual ID for the data receiving memory area used to store data by RDMA (Remote Direct Memory Access) to the remote node when the data receiving memory area has not been reserved;

storing, via the network, data indicating the memory area in the storage device after associating the data with the virtual ID upon receipt of a reservation response indicating a beginning address and a size of the reserved data receiving memory area from the remote node; and

consulting, via the network, the storage device to identify the beginning address and the size of the data receiving memory area corresponding to the virtual ID specified by the transmission request and, to the communication device, outputting a data transmission instruction to store transmission data stored in a memory area managed by the second process into the data receiving memory area in the remote node by the RDMA.

5. A non-transitory computer-readable storage medium storing a communication device management program, the program causing a computer to perform a method, the method comprising:

generating a virtual ID used to specify a memory area for receiving data which is not associated with a memory area and corresponds to a process of acquiring data from a remote node via a network upon receipt of a request from the process;

transmitting to the remote node the virtual ID corresponding to the process;

reserving, via the network, a data receiving memory area used to store data by RDMA (Remote Direct Memory Access) of a communication device in a memory space upon receipt of an address acquisition request with a specified virtual ID from the remote node;

storing, via the network, a record of association between the specified virtual ID and the data receiving memory area in a storage device;

notifying, via the network, the remote node of a beginning address and a size of the reserved data receiving memory area; and

when transmission data from the remote node is stored into the reserved data receiving memory area by the RDMA, consulting the record stored in the storage device to identify the process corresponding to the data receiving memory area storing the transmission data, and outputting an instruction to the communication device to forward the transmission data stored in the reserved data receiving memory area to a memory area managed by the identified process.

7. The non-transitory computer-readable storage medium according to claim 5, wherein the computer-executed process further comprising releasing the data receiving memory area not in use for data transmission.

8. The non-transitory computer-readable storage medium according to claim 7, wherein the releasing the data receiving memory area comprising:

transmitting a release request for the data receiving memory area associated with the virtual ID to the remote node; and

upon receipt of an acknowledge response corresponding to the release request, deleting the association between the virtual ID and the data receiving memory area stored in the storage device.

9. The non-transitory computer-readable storage medium according to claim 5, wherein the computer-executed process further comprising:

reserving the data receiving memory area again in the memory space when an occurrence of error is detected during data transmission using the data receiving memory area reserved in the communication device.

6. A non-transitory computer-readable storage medium storing a communication device management program, the program causing a computer to perform a method, the method comprising:

receiving a virtual ID used to specify a memory area for receiving data by a remote node which is not associated with a memory area and corresponds to a first process in the remote node from the remote node via a network and storing the virtual ID in a storage device, the virtual ID generated by the remote node upon receipt of a request from the first process;

consulting the storage device to determine whether the remote node has reserved a data receiving memory area corresponding to the virtual ID upon receipt of a transmission request from a second process;

transmitting, via the network, a reservation request with the virtual ID for the data receiving memory area used to store data by RDMA (Remote Direct Memory Access) to the remote node when the data receiving memory area has not been reserved;

storing, via the network, data indicating the memory area in the storage device after associating the data with the virtual ID upon receipt of a reservation response indicating a beginning address and a size of the reserved data receiving memory area from the remote node, and storing the address in the storage device; and

consulting, via the network, the storage device to identify the beginning address and the size of the data receiving memory area corresponding to the virtual ID specified by the transmission request and, to a communication device, outputting a data transmission instruction to store transmission data stored in a memory area managed by the second process into the data receiving memory area in the remote node by the RDMA.

10. The non-transitory computer-readable storage medium according to claim 6, wherein the computer-executed process further comprising:

in response to a release request from the remote node, returning a release acknowledge to the remote node upon completion of data transmission to the data receiving memory area.