US5046068A
Expired / Lapsed
US
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Multi-processor system testing method
Assignee: Hitachi Ltd
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Filing: 1989-04-18
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Granted: 1991-09-03
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Expires: 2009-04-18
Abstract
Abstract In testing the fault handling function of a multi-processor system including a master processor, a slave processor, a storage control unit shared by these processors, and a service processor, the master processor and the slave processor cooperate to synchronize with each other issuing to the storage control unit successive storage access requests all designating the same storage area. The master processor also requests the service processor to generate a pseudo-fault in the above-mentioned storage area while these access requests are being successively issued in synchronism. Upon detecting a fault, the master processor collects and examines fault information, and outputs it when an abnormal result is detected.
Inventors
- 👤 Masaya Kubo
- 👤 Kaoru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/1675; G06F11/1691; G06F11/22; G06F11/26; G06F11/273; G06F11/2736; G06F11/2205; G06F11/2215
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A method for testing the fault handling function of a multi-processor system including a first processor, a second processor and a shared unit shared by said first and second processors, comprising the steps of: synchronizing issuance of an operation request from said first processor to said shared unit with issuance of an operation request from said second processor to said shared unit such that said operation requests are issued without an interval therebetween sufficient for said shared unit to respond; generating a pseudo-fault during synchronized issuance of said operation requests; and collecting fault information resulting from said pseudo-fault.
Claim 2
Independent Claim
98 words
A method for testing the fault handling function of a multi-processor system including a first processor, a second processor and a shared unit shared by said first and second processors, comprising the steps of: synchronizing issuance of an operation request from said first processor to said shared unit with issuance of an operation request from said second processor to said shared unit such that said operation requests are issued without an interval therebetween sufficient for said shared unit to respond; generating a pseudo-fault during synchronized issuance of said operation requests; and collecting fault information resulting from said pseudo-fault.
Claim 3
Dependent Claim
59 words
A method as claimed in claim 1, wherein said synchronizing step includes the step of: synchronizing initiation of execution by said first processor of a first sequence of instructions each requiring an operation of said shared unit with initiation of execution by said second processor of a second sequence of instructions each requiring an operation of said shared unit.
Claim 4
Dependent Claim
38 words
A method as claimed in claim 2, wherein said generating a pseudo-fault step includes the step of: generating said pseudo-fault when an arbitrary one of instructions contained in a predetermined section of said first instruction sequence is executed.
Claim 5
Independent Claim
113 words
A method for testing the fault handling function of a multi-processor including a first processor, a second processor and a storage control unit shared by said first and second processors, comprising the steps of: synchronizing issuance of an access request for a storage area from said first processor to said storage control unit with issuance of an access request for said storage area from said second processor to said storage control unit such that said access requests are issued without an interval therebetween sufficient for said storage control unit to respond; generating a pseudo-fault in said storage area during synchronized issuance of said access requests; and collecting fault information resulting from said pseudo-fault.
Claim 6
Independent Claim
113 words
A method for testing the fault handling function of a multi-processor including a first processor, a second processor and a storage control unit shared by said first and second processors, comprising the steps of: synchronizing issuance of an access request for a storage area from said first processor to said storage control unit with issuance of an access request for said storage area from said second processor to said storage control unit such that said access requests are issued without an interval therebetween sufficient for said storage control unit to respond; generating a pseudo-fault in said storage area during synchronized issuance of said access requests; and collecting fault information resulting from said pseudo-fault.
Claim 7
Dependent Claim
59 words
A method as claimed in claim 4, wherein said synchronizing step includes the step of: synchronizing initiation of execution by said first processor of a first sequence of instructions all requiring accesses to the same storage area with initiation of execution by said second processor of a second sequence of instructions all requiring accesses to the same storage area.
Claim 8
Dependent Claim
38 words
A method as claimed in claim 5, wherein said generating a pseudo-fault step includes the step of: generating said pseudo-fault when an arbitrary one of instructions contained in a predetermined section of said first instruction sequence is executed.
Claim 9
Independent Claim
172 words
A method for testing the fault handling function of a multi-processor system including a first processor, a second processor, a storage control unit shared by said first and second processors, and a service processor, comprising the steps of: transferring from said first processor to said service processor information specifying a position in a program and a storage area in which a pseudo-fault is to be generated; synchronizing initiation of execution by said first processor for a first sequence of instructions all requiring accesses via said storage control unit to said specified storage area with initiation of execution by said second processor of a second sequence of instructions all requiring accesses via said storage control unit to said specified storage area such that a plurality of accesses are required without an interval therebetween sufficient for said storage control unit to respond; generating said pseudo-fault with said service processor in said specified storage area when the instruction in said specified position in said program is executed; and collecting fault information resulting from said pseudo-fault.
Claim 10
Independent Claim
172 words
A method for testing the fault handling function of a multi-processor system including a first processor, a second processor, a storage control unit shared by said first and second processors, and a service processor, comprising the steps of: transferring from said first processor to said service processor information specifying a position in a program and a storage area in which a pseudo-fault is to be generated; synchronizing initiation of execution by said first processor for a first sequence of instructions all requiring accesses via said storage control unit to said specified storage area with initiation of execution by said second processor of a second sequence of instructions all requiring accesses via said storage control unit to said specified storage area such that a plurality of accesses are required without an interval therebetween sufficient for said storage control unit to respond; generating said pseudo-fault with said service processor in said specified storage area when the instruction in said specified position in said program is executed; and collecting fault information resulting from said pseudo-fault.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |