ACM Computing Surveys (CSUR)
Program Behavior: Models and Measurements
Program Behavior: Models and Measurements
Computation of Cold-Start Miss Ratios
IEEE Transactions on Computers
IEEE Transactions on Software Engineering
Experiments with program locality
AFIPS '72 (Fall, part I) Proceedings of the December 5-7, 1972, fall joint computer conference, part I
Cache performance of operating system and multiprogramming workloads
ACM Transactions on Computer Systems (TOCS)
Accurate Low-Cost Methods for Performance Evaluation of Cache Memory Systems
IEEE Transactions on Computers
The Stack Growth Function: Cache Line Reference Models
IEEE Transactions on Computers
ACM SIGMETRICS Performance Evaluation Review
The pool of subsectors cache design
ICS '99 Proceedings of the 13th international conference on Supercomputing
| Hi-index | 14.99 |
The "hit ratio" of a high-speed buffer (cache) depends on the "locality" of memory references. However, locality of reference is disturbed and the hit ratio decreases whenever a task switch occurs. This performance degradation can be minimized if "locality of task switching," the tendency for a small set of favored tasks to be frequently executed, exists and the cache is organized in such a way that it can hold blocks (lines) of multiple tasks. Locality of task switching and locality of memory references in individual tasks exhibit overall locality of memory references at a system level. This paper addresses the following questions. Does locality of task switching really exist? How can it be modeled? Task switching in IBM operating system/virtual storage with multiple virtual storage (OS/VS2 MVS) was measured using event traces for three different workloads to show that locality of task switching actually exists in MVS. Two different models of task switching are proposed. These models can be incorporated into cache multitasking models to predict more accurately the misses in real computer systems. A key parameter of these models is the task execution interval; measurements of execution intervals for the workloads used in the paper are presented and discussed.