Hi, Here's a plan for Monday's mesh test. Feel free to edit it.
http://wiki.laptop.org/go/Mesh_Testing Plaintext copy of the current revision enclosed below: === This page describes the network testing that will be performed on Monday Feb 25th at 1cc. Setup: * Start with ten machines, keep adding ten at a time while it is useful to do so. Measurements to make during each test (in addition to workload-specific measurements): * Spectrum utilization -- as measured w/ spectrum analyzer and/or from wireshark o Wireshark may be able to break down bandwidth by packet type * Remaining bandwidth -- attempt to download a large file on one machine during test, record time taken or bandwidth achieved. * 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 (or booting). 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 at various rates of download (download 1k page/second, etc) 5. Read -- if one laptop shares a PDF, how many laptops fail to retrieve it? 6. Distance -- binary success/fail. Are there other metrics? 7. Write -- automate pressing N characters a second for small N, 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% fixes? * 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 * Block multicast in route table (are there other sources of multicast packets other than the above?) * Are there other mesh parameters to tweak? Path request timeout, for example. - Chris. -- Chris Ball <[EMAIL PROTECTED]> _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
