By Karama Kanoun (auth.), Rogério de Lemos, Taisy Silva Weber, João Batista Camargo Jr. (eds.)
This e-book constitutes the refereed complaints of the 1st Latin-American Symposium on in charge Computing, LADC 2003, held in Sao Paulo, Brazil in October 2003.
The 21 revised complete papers provided including abstracts of invited talks, a panel, workshops, and tutorials have been rigorously reviewed and chosen for presentation. The papers are geared up in topical sections on fault injection, defense, adaptive fault tolerance, disbursed algorithms, and parts and fault tolerance.
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Extra info for Dependable Computing: First Latin-American Symposium, LADC 2003, São Paulo, Brazil, October 21-24, 2003. Proceedings
Fig. 7 shows the failure modes observed from the SUT point-of-view. As we can see, results show that, in most of the experiments, the faults injected in the Oracle SGA caused the server abrupt shutdown (DBMS Crash) and only in a few cases the operating system hanged. There is also a considerable set of cases where the DBMS, although still running, aborted some of the transactions submitted due to errors caused by the faults injected. Finally, only in 2% of the experiments the faults injected have not caused the SUT to produce any erroneous behavior.
In order to quantify the effect of these faults in the system behaviour, experiments with longer observation times are required. Errors affecting the normal behaviour of the ECU are distributed as follows: • 37% of the errors had provoked an ECU failure. We say that the ECU fails when the control actions it applies on the engine in presence of faults deviates from the ones that it provides in absence of them. A failure in the ECU may provoke some noise and vibration in the engine, but it may also have more catastrophic consequences leading to damage or to stop the engine.
Fault Injector (FI) The fault injector is implemented as a script. This script contains complex sequences of processor debugger commands. A commercial Nexus debug tool (Trace32 from Lauterbach GmbH in our case) interprets and executes this script. Inputs for this script are the fault injection parameters that the EGM stores in each configuration file. Before each experiment, the target system (in our case the ECU) suffers a reset in order to return to its initial state. Then, the ECU begins its normal execution and the FI injects a fault and waits for its activation.