System for remote memory allocation in a computer having a verification table contains information identifying remote computers which are authorized to allocate memory in said computer

• US 6,128,690 A
• Filed: 03/24/1998
• Issued: 10/03/2000
• Est. Priority Date: 03/24/1998
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Compaq Computer Corporation (HP Inc.)
• Inventors: Purcell, Brian T., Brinkmeyer, Jay C.
• Primary Examiner(s): Lee, Thomas C.
• Assistant Examiner(s): ELAMIN, ABDELMONIEM I
• Application Number:
  US09/047,018
• Time in Patent Office: 924 Days
• Field of Search: 709/217, 710/1, 710/240, 711/129, 711/147, 711/148
• US Class Current: 710/240
• CPC Class Codes: G06F 12/1483 using an access-table, e.g. matrix or list
• CPC Class Codes: G06F 9/5016 the resource being the memory

Abstract

A computer system and method for remotely allocating memory space in a memory of a remote computing device comprising a local IOP which remotely allocates memory space, for use by the local IOP, in a memory of a remote computing device. The local IOP detects a condition requiring a remote memory allocation and sends a remote allocate message to the remote computing device. The local IOP also performs an internal memory allocation in response to a remote allocate message initiated and sent by the remote computing device. The memory is partitioned to allocate distinct portions of memory for use by the IOP and the remote computing device. An allocation verification table contains data pertaining to the authorization of remote computing devices to allocate memory in the local IOP. The local IOP checks the allocation verification table to verify that the remote computing device is authorized to allocate memory. A communication network interface effectuates communication, across a communication network, between the local IOP and remote computing devices, The communication network interface sends remote allocate messages to the remote computing devices and receives remote allocate messages from the remote computing device.

Claims

1. A computer system comprising:

an IOP for initiating a remote memory allocation operation in a remote computing device, the IOP further for performing an internal memory allocation in response to a remote memory allocation operation initiated by the remote computing device;

a memory for storing data, the memory capable of being partitioned to allocate distinct portions of memory for use by the IOP and the remote computing device;

a communication network interface for effectuating communication between the IOP and computing devices connected to a communication network, the communication network interface further for sending remote allocate messages, initiated by the IOP, to the remote computing devices and receiving remote allocate messages initiated and sent by the remote computing device;

an allocation verification table for storing information identifying remote computing devices which are authorized to allocate portions of memory for use by the remote computing device; and

an integrated real time operating system for controlling operation of the IOP.

2. The computer system as recited in claim 1, further comprising a buffer table for storing information describing the partitioning and allocation of the memory.

3. The computer system as recited in claim 1, wherein the communication network interface is an Ethernet peer transport for effectuating communication between the IOP and other computing devices across an Ethernet.

4. The computer system as recited in claim 1, wherein the communication network interface is a PCI peer transport for effectuating communication between the IOP and other computing devices across a PCI bus.

5. The computer system as recited in claim 3, further comprising a transport agent for effectuating communication between the integrated real time operating system and the PCI peer transport.

6. The computer system as recited in claim 5, further comprising:

a host central processing unit communicating with the IOP across the PCI bus via a host-to-PCI bus interface; and

a host operating system for controlling operation of the host central processing unit and further for maintaining the data in the allocation verification table.

7. The computer system as recited in claim 6, further comprising:

a IOP peer application downloadable driver module operating on the IOP; and

a Peer-to-Peer operating system module operating on the host central processing unit, the Peer-to-Peer operating system module functioning in conjunction with the IOP peer application downloadable driver module to effectuate Peer-to-Peer communication between the IOP and other computing devices across the PCI bus.

8. A method for a local IOP to remotely allocate memory space in a memory of a remote IOP comprising the steps of:

detecting a condition requiring remote memory allocation;

sending a remote allocate message from the local IOP to the remote IOP in response to the detection of a condition requiring remote memory allocation; and

allocating memory space in the memory of the remote IOP for use by the local IOP in response to the remote allocate message;

wherein the step of detecting a condition requiring remote memory allocation further comprises the steps of;

determining if memory space was previously allocated for use by the local IOP and is currently available; and

terminating the remote memory allocation if memory space was previously allocated for use by the local IOP and is currently available.

9. The method as recited in claim 8, wherein the step of sending a remote allocate message from the local IOP to the remote IOP comprises the steps of:

communicating the remote allocate message from a local integrated real time operating system of the local IOP to a local transport agent operating in a data transport layer of the local IOP;

communicating the remote allocate message from the local transport agent to a local peer transport operating in the local IOP; and

communicating the remote allocate message across a communication network from the local peer transport to the remote IOP.

10. The method as recited in claim 9, wherein the step of communicating the remote allocate message across a communication network further comprises the steps of:

communicating the remote allocate message from the communication network to a remote peer transport operating on the remote IOP;

communicating the remote allocate message from the remote peer transport to a remote transport agent operating in a data transport layer on the remote IOP; and

communicating the remote allocate message from the remote transport agent to a remote integrated real time operating system operating on the remote IOP.

11. The method as recited in claim 9, wherein the step of communicating the message across a communication network comprises the step of communicating the message across a PCI bus using Peer-to-Peer communication.

12. The method as recited in claim 8, wherein the step of allocating memory space in the memory of the remote IOP for use by the local IOP comprises the steps of:

determining whether the local IOP is authorized to remotely allocate memory space in the memory of the remote IOP;

determining whether there is adequate memory space in the memory of the remote IOP to allocate for use by the local IOP;

terminating the remote memory allocation if either the local IOP is unauthorized or if there is inadequate memory space to allocate for use by the local IOP;

otherwise

allocating memory space in the memory of the remote IOP for use by the local IOP.

13. The method as recited in claim 12, wherein the step of terminating the remote memory allocation further comprises the step of sending an unsuccessful reply message from the remote IOP to the local IOP.

14. The method as recited in claim 12, wherein the step of allocating memory space in the memory of the remote IOP for use by the local IOP further comprises the step of assigning the allocated memory space to the local IOP in a buffer table of the remote IOP.

15. The method as recited in claim 12, wherein the step of allocating memory space in the memory of the remote IOP for use by the local IOP further comprises the step of sending a successful reply message to the local IOP.

16. The method as recited in claim 15, further comprising the step of entering a description of the remotely allocated memory space into a buffer table of the local IOP designating it as an extension of the memory space available to the local IOP.