System and method for fast context switching between tasks

Details System and method for fast context switching between tasks System and method for fast context switching between tasks

1995-11-09

1998-03-10

Kriess, Kevin A.

Boots, shoes, and leggings

395569, 364230, 3642301, 3642302, G06F 946

Patent

active

057272115

ABSTRACT:
A system and method for fast context switching between tasks by tracking task utilization of shared system resources and optimizing swapping the shared system resources to backing store by computing the difference between the current task's utilization of the system resources and the incoming task's utilization of the shared system resources and only swapping to backing store the difference between the current task's utilization, the available system resources, and the incoming task's needs.

REFERENCES:
Research Disclosure, No. 318, "Register Mask Based Microprocessor Context Switching", pp. 825-826, 1 Oct. 1990, XPOOO148672.
IBM Technical Disclosure Bulletin, vol. 33, No. 3B, 1 Aug. 1990, "Technique to Improve Context Switching Performance in a CPU", pp. 472-473, XPOOO124425.
Sudarshan K. Dhall and C.L. Liu, "On a Real-Time Scheduling Problem", Operations Research, vol. 26, No. 1, Jan-Feb. 1978, pp. 127-140.
H.M. Abdel-Wahab and T. Kameda,"Scheduling to Minimize Cumulative Cost Subject to Series-Parallel Precedence Constrains", Operations Research, vol. 26, No.1, Jan-Feb. 1978, p. 141.
C.L. Lou and James W. Layland, "Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment", Journal of the Association for Computing Machinery, vol. 20, No. 1, Jan. 1978, pp. 46-61.
J.F. Bortolotti, P. Vernard, and E. Bouchet, "RTKM: A Real-Time Microkernel", Dr. Dobb's Journal, May 1994, pp. 70, 72, 74, 76, 105-106.
David Shear, "Three DSP RTOSs are Ready to Merge with Windows", EDN-Technology Update, Jun. 1994, pp. 2929-30, 32 and 34.

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