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Multiprocessor computer system with user specifiable process placement
| Details |
Inventors: Krueger, Phillip Eric; Casper, Corene; Dove, Kenneth Frank; Kingsbury, Brent Alan; McKenney, Paul Edward;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Banankhah; Majid
Assistant Examiner:
Attorney, Agent or Firm: Klarquist Sparkman Campbell Leigh and Whinston LLP
An apparatus and method is disclosed for allowing a user process to advise or control an operating system to place a process on a particular node or a node within a set of nodes. When a user process makes a system call to the operating system to either create, execute, move, or attach a process, a specified system resource is passed to the operating system with the system call. This advises the operating system to store the process on a node containing the system resource identified in the system call. The user process can also require the operating system to store a process on a particular node. |
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DETAILED DESCRIPTION The present invention allows a user process to advise or control where an operating system in a distributed shared-memory multiprocessor computer system stores a process.
Additionally, the user can advise the operating system of the system resources the process frequently accesses.
Still further, different components of the process are stored on a single node to maximize efficiency.
In one aspect of the invention, a user process may advise an operating system to store a process (i.
e.
, another process or the user process itself on a node having a specified system resource.
When the user process makes a system call to the operating system to either create or move a process, a specified system resource is passed with the call to the operating system.
This advises the operating system to store the process on a node containing the specified system resource.
The operating system does not have to accept this advice.
Other factors, such as the node containing the system resource is overloaded, may cause the operating system to chose a different node.
In any event, the process is stored on a node that maximizes efficiency in execution of the process.
In another aspect of the invention, the user process may advise the operating system to store a process on a particular node (rather than a node having a particular system resource).
In this case, a set of one or more nodes is passed to the operating system in a system call.
The operating system uses the set as advice to store the process on a node within the set.
Again, the advice can be ignored if the operating system determines that maximum efficiency can be achieved by storing the process on a different node.
In yet another aspect of the invention, the user process can require (rather than advise) the operating system to store a process on a particular node or on a node having a particular system resource.
This provides control over the operating system not traditionally available.
In still a further aspect of the present invention, a user process can request the operating system for information not typically available to user processes
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Processing Data 
