...
Performance & Virtual Machines,
speaker: Alessandra Scicchitano, SWITCH
...
Update of ESNet perfSONAR Activities
speaker: Brian Tierney, ESnet
slides: https://spaces.at.internet2.edu/download/attachments/10402/20130114-tierny-perfsonarupdate.pdf
Recently upgraded ESnet backbone to 100G. ESnet runs perfSONAR everywhere. Just released beta perfSONAR-PS Toolkit 3.3-rc1, a major overhaul. More to come in next few weeks, including integration of Web10G. ESnet has 1.5 FTEs dedicated to perfSONAR support. ESNet has 80 machines deployed. They run BWCTL and OWAMP on separate hosts so that throughput tests (BWCTL) don't mess up latency tests (OWAMP) or vice-versa.
...
Centrally Managing perfSONAR Tests for Organizations and VOs
- speaker: Aaron Brown, Internet2
slides: https://spaces.at.internet2.edu/download/attachments/10402/20130114-brown-meshconfg.pdf
Problem: each perfSONAR server is a testing island. How do we avoid doing the same test between servers, or missing a path in a mesh? Solution: a centrally-managed description of the "mesh", in JSON format. Each server downloads the the shared description periodically. This is integrated with MaDDash.
...
The Effects Of GSO/TSO On TCP Performance –
speaker: Andy Germain
The TSO feature of modern NICs will screw up tcpdump because a large packet is sent to the NIC and is then fragmented by the NIC. It makes sense to offload the CPU.
...