This thesis presents a tool for obtaining worst-case execution time (WCET) guarantees for ARM processors. This tool is an interface between ARM¡¦s GCC compiler and the SWEET WCET analyzer. SWEET is an open-source static analyzer that derives a guaranteed upper bound on the WCET of a program.
The WCET of a program is an important metric in real-time systems. The task scheduler must decide how much time to allot for each process; if the allotted time exceeds the WCET, the process can be guaranteed to always finish in time. Although the WCET value is therefore useful, it is difficult to find. But, for the purpose of guaranteeing that a process finishes on time, an upper bound on the WCET suffices. Static program analysis has been proposed as a method to derive such an upper-bound on the WCET, by means of conservatively approximating the runtime of the individual parts of a complete program. SWEET is one such static analyzer.
Our tool works inside of ARM-GCC, extracting all of the information that SWEET needs about the program¡¦s behavior. Our tool then packages the information into the SWEET¡¦s ALF format. The tool has been tested and works correctly for every input source that we have tested (including all 34 benchmarks from the WCET BENCHMARK SUITE[1]).
This work was funded by Taiwan¡¦s National Science Council, grant NSC 97-2218-E-110-003
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0809110-112924 |
| Date | 09 August 2010 |
| Creators | Yen, Cheng-Yu |
| Contributors | Chung-Nan Lee, Steve W. Haga, Ming-Chao Chiang |
| 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-0809110-112924 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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