Mesh Testing

This page describes the network testing that will be performed on Monday Feb 25th at 1cc.

Setup:

• Start with ten machines, keep adding ten until data doesn't change.

Measurements to make during each test:

• Spectrum utilization -- estimate rate, integral, vs. idle
• Remaining bandwidth -- attempt to download a large file on one machine during test, record time taken.
• Total # of laptops seen on mesh view on all numbers (should be n^2).

Workloads -- tests to perform, along with their quantitative metrics:

1. Idle load.
2. Every machine coming out of suspend.
3. Every machine trying to register with school server -- Number of machines that failed the first attempt, failed second attempt, etc.
4. Ricardo's web spider -- record rates
5. Read -- if one laptop shares a PDF, how many laptops fail to retrieve it?
6. Distance
7. Write -- automate pressing 1 character every second, look at received rate/update time, increase number of participants
8. olpc-update -- number of machines upgraded in 1 hour

Variables to investigate:

• Set mesh ttl to 1 for every packet
• Change bcast/mcast rate on every node
• Jim's Avahi config 30% fix?
• Presence: Benchmark bandwidth use of Avahi vs. Cerebro vs. no presence?
• Collaboration: Benchmark switching from multicast to unicast?
• Suspend/resume: Off vs. on, wake-on-unicast vs. wake-on-multicast