mirror of
https://github.com/kata-containers/kata-containers.git
synced 2026-03-18 10:44:10 +00:00
c3d3684f81
Introduce independent IOThread framework for Kata container. What is the indep_iothreads: This new feature introduce a way to pre-alloc IOThreads for QEMU hypervisor (maybe other hypervisor can support too). Independent IOThreads enables IO to be processed in a separate thread. To generally improve the performance of each module, avoid them running in the QEMU main loop. Why need indep_iothreads: In Kata container implementation, many devices based on hotplug mechanism. The real workload container may not sync the same lifecycle with the VM. It may require to hotplug/unplug new disks or other devices without destroying the VM. So we can keep the IOThread with the VM as a IOThread pool(some devices need multi iothreads for performance like virtio-blk vq-mapping), the hotplug devices can attach/detach with the IOThread according to business needs. At the same time, QEMU also support the "x-blockdev-set-iothread" to change iothreads(but it need stop VM for data secure). Current QEMU have many devices support iothread, virtio-blk, virtio-scsi, virtio-balloon, monitor, colo-compare...etc... How it works: Add new item in hypervisor struct named "indep_iothreads" in toml. The default value is 0, it reused the original "enable_iothreads" as the switch. If the "indep_iothreads" != 0 and "enable_iothreads" = true it will add qmp object -iothread indepIOThreadsPrefix_No when VM startup. The first user is the virtio-blk, it will attach the indep_iothread_0 as default when enable iothread for virtio-blk. Thanks Chen Signed-off-by: zhangchen.kidd <zhangchen.kidd@jd.com>
Kata golang packages
This repository contains a number of packages in addition to the
virtcontainers package:
| Package name | Description |
|---|---|
katatestutils |
Unit test utilities. |
katautils |
Utilities. |
signals |
Signal handling functions. |