More Tales from the Bringup Lab
Bryan Cantrill and the Oxide Computer Company team, including Arjen Roodselaar, Eric Aasen, and Matt Keeter, detail the bring-up of Sidecar, a switching board based on the Intel Tofino 2 ASIC, and Gimlet, their compute node. They discuss the extreme difficulty of designing the Power Delivery Network (PDN) to handle 300-amp load steps with only 7 millivolts of margin, requiring a custom 'load slammer' for testing. The team also recounts debugging firmware and hardware issues, including TOML parsing errors, slew rate mismatches on SPI traces, and a critical 500-ohm pull-down resistor error on the T6 NIC that nearly halted production.