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Air traffic control
Voice servers that don't drop a call
A radio server reworked to carry far more simultaneous calls on the same hardware, with memory use cut from 70% to 12%.
Results
- simultaneous calls, up from 600
- 1,000+
- faster overall
- 2×
- memory use, down from 70%
- 12%
The challenge
A supplier of air traffic communication systems couldn't meet the demands of a major customer: its radio server ran out of capacity when too many voice streams arrived at once.
What we built
- An in-depth analysis of the server's source code to find the real bottlenecks
- Redesigned audio conferencing routines, the hottest path in the system
- More than 120 new failure-control mechanisms
- Rebuilt internal data structures and smarter memory allocation
Built with
- C
- Linux
- Data structures
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