Electrical computers and digital processing systems: memory – Storage accessing and control – Memory configuring
Reexamination Certificate
2005-05-24
2005-05-24
Sparks, Donald (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Memory configuring
C711S141000, C711S118000, C711S154000, C709S213000
Reexamination Certificate
active
06898687
ABSTRACT:
Resources may be shared between multiple controllers configured to access those resources by associating a portion of a semaphore shared memory region with each different shared resource. Whenever a local write request to the portion of the semaphore shared memory region is detected by a memory controller, the memory controller may broadcast the write request to other remote memory controllers. The memory controller may delay performing a memory access to a local copy of that portion of the semaphore shared memory region until the other memory controllers have performed the write access to their copy of the semaphore shared memory region. The values stored in the semaphore shared memory region indicate which controller currently has access to the shared resource.
REFERENCES:
patent: 4991079 (1991-02-01), Dann
patent: 5072373 (1991-12-01), Dann
patent: 5146607 (1992-09-01), Sood et al.
patent: 5255369 (1993-10-01), Dann
patent: 5544319 (1996-08-01), Acton et al.
patent: 5581732 (1996-12-01), Dann
patent: 6094709 (2000-07-01), Baylor et al.
patent: 6122713 (2000-09-01), Huang et al.
patent: 6446149 (2002-09-01), Moriarty et al.
patent: 6457100 (2002-09-01), Ignatowski et al.
patent: 6594736 (2003-07-01), Parks
patent: 6675262 (2004-01-01), Wilson et al.
patent: 6711652 (2004-03-01), Arimilli et al.
patent: 6738872 (2004-05-01), Van Huben et al.
patent: 6795850 (2004-09-01), Wu et al.
patent: 20030126381 (2003-07-01), Vo
patent: 20040117562 (2004-06-01), Wu et al.
patent: 20040117579 (2004-06-01), Wu et al.
Zuberi, et al., “An Efficient Semaphore Implementation Scheme for Small-Memory Embedded Systems”, © 1997 IEEE, p. 25-3.*
Petit, et al., “Characterizing Parallel Workloads to Reduce Multiple Writer Overhead in Shared Virtual Memory Systems”, © 200 IEEE, p. 1-8.*
“Sun Storeddge A1000/D1000, Detailed View,” printed from http://www.sun.com/storage/workgroup/a1000/details.html, Jun. 25, 2002, 24 pages.
“VA 7100 Hardware High Availability Features,” Hewlett-Packard Company, White Paper, Jun. 2001, 16 pages.
“Fast Locks in Distributed Shared Memory Systems,” Appeared in HICSS Jan. 1994, 12 pages.
Acton John D.
Wu Chia Y.
Kowert Robert C.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Peugh Brian R.
Sparks Donald
Sun Microsystems Inc.
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