US4733348A
Expired / Lapsed
US
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Virtual-memory multiprocessor system for parallel purge operation
Assignee: Toshiba Corp
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Filing: 1985-05-30
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Granted: 1988-03-22
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Expires: 2005-05-30
Abstract
Abstract A virtual memory control multiprocessor system has a plurality of processors each having a translation lookaside buffer (TLB). A purge request source processor commonly supplies a purge request signal to other processors so as to cause them to perform TLB purge operations. A purge end signal sent back from other processors is stored in flip-flops in the source processor in units of processors. The source processor detects the end of TLB purge operations of all processors, in accordance with the statuses of the flip-flops.
Inventors
- 👤 Takashi Hiraoka
- 👤 Toyohiko Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:30
CPC Classifications
G; G06; G06F; G06F12/00; G06F12/02; G06F12/08; G06F12/10; G06F12/1027; G06F12/0802; G06F12/0806; G06F12/0842; G06F2212/00; G06F2212/68; G06F2212/682
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A virtual-memory-type multiprocessor system having a plurality of processors each having a translation lookaside buffer, comprising: a first processor having a purge request signal generating means for supplying a common purge request signal requesting purging of translation lookaside buffers of said other processors; a plurality of flip-flops provided in each of said plurality of processors each of said flip-flop for storing a corresponding purge end signal, for each of said plurality of processors, each of said other processors, upon completion of purge operations in response to the common purge request signal, sending a corresponding processor number to each other processor; each of said processors further comprising: a decoder for decoding each processor number sent and setting the flip-flop corresponding to the decoded processor number; and purge end detecting means connected to each of said plurality of flip-flops for detecting the end of the purging of all processors.
Claim 2
Dependent Claim
147 words
A virtual-memory-type multiprocessor system having a plurality of processors each having a translation lookaside buffer, comprising: a first processor having a purge request signal generating means for supplying a common purge request signal requesting purging of translation lookaside buffers of said other processors; a plurality of flip-flops provided in each of said plurality of processors each of said flip-flop for storing a corresponding purge end signal, for each of said plurality of processors, each of said other processors, upon completion of purge operations in response to the common purge request signal, sending a corresponding processor number to each other processor; each of said processors further comprising: a decoder for decoding each processor number sent and setting the flip-flop corresponding to the decoded processor number; and purge end detecting means connected to each of said plurality of flip-flops for detecting the end of the purging of all processors.
Claim 3
Dependent Claim
81 words
A system according to claim 1, wherein said purge end detecting means comprises: first gates, respectively connected to said flip-flops, for receiving output signals therefrom, a signal indicating said source processor, and a signal indicating absence of any one of said processors from said multiprocessor system, and for outputting the logical sum of all input signals; and a second gate connected to each of said first gates for outputting the logical product of all the output signals from said first gates.
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) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |