{"guid":"8c4a0c5d-a567-5d74-947a-f61e7e6efcc4","title":"\"What can possibly go wrong?\" Stories of peculiarities of modern server hardware","subtitle":null,"slug":"denog17-75886-what-can-possibly-go-wrong-stories-of-peculiarities-of-modern-server-hardware","link":"https://pretalx.com/denog17/talk/VJJ9RC/","description":"After discussing building a 1 Tbps/1 Gpps load generator on commodity x86-64 hardware, one of the most common follow-up topics was the reasoning behind some of the decisions. And here I've realised that it is not commonly understood that modern systems are more complex than classic multi-socket NUMA systems, and that if you don't consider some of their peculiarities, you won't achieve the expected performance. In this talk, I want to explore what happens when you break those assumptions and how you can identify them. All examples would be based on the assumption that you are using Cisco T-Rex for load generation and fd.io VPP as a target load.\n\nLicensed to the public under http://creativecommons.org/licenses/by/4.0","original_language":"eng","persons":["Vladimir Smirnov"],"view_count":384,"promoted":false,"date":"2025-11-10T14:30:00.000+01:00","release_date":"2025-11-10T00:00:00.000+01:00","updated_at":"2026-04-20T12:15:06.629+02:00","tags":["75886","2025","denog17","Saal B","denog17-eng","Day 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