Nov 13 – 15, 2023
America/New_York timezone

CPUfreq/sched and VM guest workload problems

Nov 14, 2023, 3:45 PM
15m
"James River Salon B" (Omni Richmond Hotel)

"James River Salon B"

Omni Richmond Hotel

83
Power Management and Thermal Control MC Power Management and Thermal Control MC

Speakers

David Dai Saravana Kannan

Description

This is a continuation of the similarly titled talk from last year and will focus on the remaining open items.
https://lpc.events/event/16/contributions/1195/

Running a workload on VM results in very disparate CPUfreq/sched behavior compared to running the same workload on the host. This difference in CPUfreq/sched behavior can cause significant power/performance regression (on top of virtualization overhead) for a workload when it is run on a VM instead of the host.

We've already sent out v3 of the patch series we want to land, but that design still leave a lot of performance/power on the table. This talk will discuss any remaining issues and proposals on how we can solve them.

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