| Publisher | Sun Microsystems | ||
|---|---|---|---|
| Format | 273.6KB PDF | Date added | 23 Jul 2007 |
| Topics | Processors, Software Engineering | ||
| Downloads | 15 | ||
This paper makes a case that a thread scheduler for heterogeneous multicore systems should target three objectives: optimal performance, core assignment balance and response time fairness. Performance optimization via optimal thread-to-core assignment has been explored in the past; this paper demonstrates the need for balanced core assignment. The paper shows that unbalanced core assignment results in completion time jitter and inconsistent priority enforcement; it then presents a simple fix to the Linux scheduler that eliminates these problems. The second part of the paper addresses the problem of building the HMC scheduler that balances all three objectives. This is a difficult optimization problem.
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