In the microprocessor system, exploiting ILP is an important key for improving performance. As instructions scheduling mechanism is designed complicated for employing ILP more efficient, the hardware cost will become larger in opposition. In the nowadays processor, they adopt the multiple scheduler queues to issue instructions so that the hardware cost will be not larger. But in this scheduling mechanism, it could successive issue the instructions that have dependence. This situation can makes that the utilization of execution units is not saturated. In the hyperthreading architecture, the instructions in the scheduler queue have high degree of parallelism. If we can
decrease the probability of situation that successive issue the instructions that have dependence, the utilization of execution units will heighten. In this paper, we propose
the scheduling mechanism called as priority-scheduling buffer to replace the original scheduler queues. The scheduling mechanism will divide an original scheduler queue
into multiple virtual scheduler queues according to the dependence of instructions. the instructions that have dependence will dispatch into the same virtual scheduler queue. The instructions can be issued from the ahead of different virtual scheduler queues. This can reduce the probability that successive issues the instructions that have dependence. According to result of simulation in SPEC CINT2000, we adopt the Intel Pentium 4 for basic architecture of our simulation. In the five threads executing simultaneously, the performance will increase 7.14% average that compares with the original scheduler queue.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0803104-231024 |
| Date | 03 August 2004 |
| Creators | du, ling-yan |
| Contributors | Shen-Fu Hsiao, Jih-ching Chiu, Chung-Oing Chung |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0803104-231024 |
| Rights | unrestricted, Copyright information available at source archive |
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