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PID Controller for Cinnamon

November 1, 2023 / Global
Featured image for PID Controller for Cinnamon
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Figure 1: Pneumatic PID controller, where the three buttons control the P, I, and D terms.
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Figure 2: Architecture diagram of Cinnamon, with the PID controller part highlighted. 
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Figure 3: The PID controller schematics for Cinnamon
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Figure 4: Inner components of the scheduler and the relationship between inflights and request queue
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Figure 5: Example cumulative distribution of request priorities
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Figure 6: Top graphs show the inbound RPS (yellow line) and how many were accepted (green line). Bottom graph shows the varying rejection threshold, that is adjusted to the inbound RPS.
Jakob Holdgaard Thomsen

Jakob Holdgaard Thomsen

Jakob Holdgaard Thomsen is a Principal Engineer at Uber, working out of the Aarhus office, helping to make Uber's systems more performant and more reliable.

Vladimir Gavrilenko

Vladimir Gavrilenko

Vladimir Gavrilenko is a Software Engineer at Uber on the Inventory and Catalog team based in Aarhus, where he focuses on reliability and scalability.

Jesper Lindstrom Nielsen

Jesper Lindstrom Nielsen

Jesper Lindstrom Nielsen is a Staff Engineer at Uber on the Inventory and Catalog team based in Aarhus, trying to make everything run a bit faster and scale a bit more.

Timothy Smyth

Timothy Smyth

Timothy Smyth is a Staff Engineer at Uber on the Delivery Backend Platform team based in New York City, helping to increase the resilience of Uber Delivery.

Posted by Jakob Holdgaard Thomsen, Vladimir Gavrilenko, Jesper Lindstrom Nielsen, Timothy Smyth

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