The Practice Method to Speed Up 10x Boot-up Time for Guest in Alibaba Cloud

Explore a 15-minute conference talk that delves into Alibaba Cloud's innovative approach to significantly accelerate guest boot-up times. Learn about the challenges posed by passthrough devices and their impact on QEMU initialization. Discover the architecture overview, including virtio balloon communication, related functions, and structures. Understand the balloon range tracking workflow and the guest boot process with asynchronous DMA mapping. Gain insights into the optimization design and the impressive achievements in speeding up boot times by a factor of 10.

Intro
Agenda Background
What is the problem? Dma_map all the guest memory when there is passthrough device
Guest boot & QEMU initialization time vs memory size
Options
Architecture Overview
virtio balloon communication Related functions and struct
Balloon range tracking workflow
Guest boot process with async dma map
Optimization design
Achievements