Electrical computers and digital processing systems: multicomput – Computer-to-computer data routing – Least weight routing
Patent
1998-08-25
2000-08-29
Banankhah, Majid
Electrical computers and digital processing systems: multicomput
Computer-to-computer data routing
Least weight routing
709104, G06F 900
Patent
active
06112222&
ABSTRACT:
Hybrid lock and unlock capabilities are provided for a threaded computing environment. For example, kernel locking services are selectively employed in conjunction with functions in the POSIX threads standard to provide a lock capability and an unlock capability. The hybrid approach determines which lock scheme to employ by evaluating whether one thread or multiple threads concurrently desire a resource lock. When only one thread desires the lock, the thread is directly assigned resource ownership employing one of an operating system primitive lock process or a hardware lock process. An alternate lock process is used to obtain resource ownership when multiple threads concurrently desire the lock. This alternate process employs at least one function in the POSIX threads standard to implement a queue of waiting threads. A similar hybrid approach to the unlock capability is also provided.
REFERENCES:
patent: 4604694 (1986-08-01), Hough
patent: 5012409 (1991-04-01), Fletcher et al.
patent: 5285528 (1994-02-01), Hart
patent: 5421014 (1995-05-01), Bucher
patent: 5442758 (1995-08-01), Slingwine et al.
patent: 5450592 (1995-09-01), McLeod
patent: 5452459 (1995-09-01), Drury et al.
patent: 5481706 (1996-01-01), Peek
patent: 5511192 (1996-04-01), Shirakihara
patent: 5590326 (1996-12-01), Manabe
patent: 5608893 (1997-03-01), Slingwine et al.
patent: 5630136 (1997-05-01), Davidson et al.
patent: 5669500 (1997-09-01), Sutherland
patent: 5946711 (1999-08-01), Donnelly
Performance Characteristic of Protocols With Ordered Shared Locks, D. Agrawal, A. El Abbadi, A.E. Lang, Department of Computer Science, University of California, Santa Barbara, Ca 93106, ICDE, Apr. 1991.
IBM Publication: D. Blakely-Fogel, "Porting Applications to the AIX 4.1 OS SMP environment", pp. 28-29 (Nov., 1994).
K.A. Robbins and S. Robbins, "Practical UNIX Programming: A Guide to Concurrency, Communication, and Multithreading", p. 10, pp. 333-334, 347-349 & 365-369, (1996).
IBM Publication: "AIX Technical Reference, vol. 2: Base Operating System & Extensions", Version 4, 4th edition, pp. 1-1065-1-1072 & p. 1-1092 (Oct., 1996).
IBM Publication: "IBM Parallel Environment for AIX: MPI Programming and Subroutine Reference", Version 2, Release 2, 2nd edition, pp. 319-325 (Nov., 1996).
W. Richard Stevens, "UNIX network Programming", Health Systems International, pp.326-328 & pp. 333-334 (1990).
M. Snir et al., "The communication software and parallel environment of the IBM SP2", IBM Systems Journal, vol. 34, No. 2, pp. 205-215, (1995).
IBM Publication: "IBM Parallel Environment for AIX: MPI Programming and Subroutine Reference", Version 2, Release 3, 3rd edition, pp. 151 & 152; pp. 179 & 180 (Aug. 25, 1997).
IBM Publication: "AIX Technical Reference, vol. 1: Base Operating System & Extensions", Version 4, 4th edition, pp. 1-840-1-842; pp. 1-850 & 1-851; pp. 1-875 & 1-876; & p. 1-879 (Oct. 1996).
Govindaraju Rama K.
Kon Elizabeth Anne
Straub Robert Michael
Tuel, Jr. William G.
Banankhah Majid
Gonzalez, Esq. Floyd A.
International Business Machines - Corporation
LandOfFree
Method for resource lock/unlock capability in multithreaded comp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for resource lock/unlock capability in multithreaded comp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for resource lock/unlock capability in multithreaded comp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1259252