Loading...
Please wait, while we are loading the content...
Similar Documents
Measuring Cache Related Pre-emption Delay on a Multiprocessor Real-Time System
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sebek, Filip |
| Copyright Year | 2001 |
| Abstract | Cache memories in real-time systems can increase performance, but to the cost of unpredictable behavior which gives loose bounds on the worst case execution time analysis. Task preemption cause a swap of cache contents with an initial performance dip that is considered as a delay. This delay is necessary in execution time analysis and must be added to each taskswitch to determine if the task sets are schedulable. Cache performance and costs have traditionally been estimated through trace-driven simulations, but since representative traces and a true simulation models are hard to accomplish, a ”physical” measurement at the system might be the only way to get the status of the system. This paper suggests two methods to measure the cache related pre-emption delay on a Power PC750 multiprocessor system by using the processors’ built-in performance monitor. One method is completely hardware-based and the other has a minimal software support. Both methods pass information to an external monitor system that stores data with timestamps in a database for further analysis. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.idt.mdh.se/fsk/docs/rtes01sebek.pdf |
| Alternate Webpage(s) | http://www.mrtc.mdh.se/publications/0343.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
