Sep 12 – 14, 2022
Europe/Dublin timezone

CPUfreq/sched and VM guest workload problems

Sep 14, 2022, 5:15 PM
25m
"Pembroke" (Clayton Hotel on Burlington Road)

"Pembroke"

Clayton Hotel on Burlington Road

262
Power Management and Thermal Control MC Power Management and Thermal Control MC

Speaker

Saravana Kannan

Description

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.

This talk will highlight some of the CPUfreq and scheduler load tracking issues/questions both at the guest thread level and at the host vCPU thread level and explore potential solutions.

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Primary author

Saravana Kannan

Presentation materials

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