What We Measured
233 POSIX Calls (including real-time extensions)
- That take at least one parameter
- That don’t intentionally hang or generate signals
- 92,658 tests per OS if all 233 functions are supported
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“Single-number” summary metric
- Failure rate computed for each function and then averaged
- Should weight by usage frequency for any particular application environment
- Gives a portable comparative metric for robustness(!)